10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

QUARTERLY PERIOD ENDED September 30, 2017

Commission File Number 1-34073

Huntington Bancshares Incorporated

Maryland	31-0724920
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

Registrant's address: 41 South High Street, Columbus, Ohio 43287

Registrant’s telephone number, including area code: (614) 480-8300

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months and (2) has been subject to such filing requirements for the past 90 days.     x  Yes    ¨  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website (if any) every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     x  Yes    ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. Refer to the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” and emerging growth company in Rule 12b-2 of the Securities Exchange Act. (Check one):

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)
		Smaller reporting company	¨
		Emerging growth company	¨

If an emerging growth company, indicate by checkmark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities Exchange Act).     ¨  Yes    x  No

There were 1,080,946,315 shares of the Registrant’s common stock ($0.01 par value) outstanding on September 30, 2017.

HUNTINGTON BANCSHARES INCORPORATED

INDEX

PART I. FINANCIAL INFORMATION
Item 1. Financial Statements (Unaudited)	39
Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016	40
Condensed Consolidated Statements of Income for the three months and nine months ended September 30, 2017 and 2016	41
Condensed Consolidated Statements of Comprehensive Income for the three months and nine months ended September 30, 2017 and 2016	43
Condensed Consolidated Statements of Changes in Shareholders’ Equity for the nine months ended September 30, 2017 and 2016	44
Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2017 and 2016	45
Notes to Unaudited Condensed Consolidated Financial Statements	47
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	6
Executive Overview	6
Discussion of Results of Operations	7
Risk Management and Capital:	19
Credit Risk	19
Market Risk	27
Liquidity Risk	29
Operational Risk	30
Compliance Risk	31
Capital	31
Fair Value	33
Business Segment Discussion	33
Additional Disclosures	37
Item 3. Quantitative and Qualitative Disclosures about Market Risk	98
Item 4. Controls and Procedures	99
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	100
Item 1A. Risk Factors	100
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	100
Item 6. Exhibits	100
Signatures	103

2

Glossary of Acronyms

The following listing provides a comprehensive reference of common acronyms used throughout this document.

ABS	Asset-Backed Securities
ACL	Allowance for Credit Losses
AFS	Available-for-Sale
ALCO	Asset-Liability Management Committee
ALLL	Allowance for Loan and Lease Losses
ANPR	Advance Notice of Proposed Rulemaking
ASC	Accounting Standards Codification
ATM	Automated Teller Machine
AULC	Allowance for Unfunded Loan Commitments
Basel III	Refers to the final rule issued by the FRB and OCC and published in the Federal Register on October 11, 2013
BHC	Bank Holding Companies
BHC Act	Bank Holding Company Act of 1956
C&I	Commercial and Industrial
CCAR	Comprehensive Capital Analysis and Review
CDO	Collateralized Debt Obligations
CDs	Certificate of Deposit
CET1	Common equity tier 1 on a transitional Basel III basis
CFPB	Consumer Financial Protection Bureau
CISA	Cybersecurity Information Sharing Act
CMO	Collateralized Mortgage Obligations
CRA	Community Reinvestment Act
CRE	Commercial Real Estate
CREVF	Commercial Real Estate and Vehicle Finance
DIF	Deposit Insurance Fund
Dodd-Frank Act	Dodd-Frank Wall Street Reform and Consumer Protection Act
EFT	Electronic Fund Transfer
EPS	Earnings Per Share
EVE	Economic Value of Equity
FASB	Financial Accounting Standards Board
FDIC	Federal Deposit Insurance Corporation
FDICIA	Federal Deposit Insurance Corporation Improvement Act of 1991
FHA	Federal Housing Administration
FHC	Financial Holding Company
FHLB	Federal Home Loan Bank
FICO	Fair Isaac Corporation

3

FirstMerit	FirstMerit Corporation
FRB	Federal Reserve Bank
FTE	Fully-Taxable Equivalent
FTP	Funds Transfer Pricing
GAAP	Generally Accepted Accounting Principles in the United States of America
HIP	Huntington Investment and Tax Savings Plan
HQLA	High Quality Liquid Asset
HTM	Held-to-Maturity
IRS	Internal Revenue Service
LCR	Liquidity Coverage Ratio
LGD	Loss-Given-Default
LIBOR	London Interbank Offered Rate
LIHTC	Low Income Housing Tax Credit
LTV	Loan to Value
MBS	Mortgage-Backed Securities
MD&A	Management’s Discussion and Analysis of Financial Condition and Results of Operations
MSA	Metropolitan Statistical Area
MSR	Mortgage Servicing Rights
NAICS	North American Industry Classification System
NALs	Nonaccrual Loans
NCO	Net Charge-off
NII	Net Interest Income
NIM	Net Interest Margin
NPAs	Nonperforming Assets
OCC	Office of the Comptroller of the Currency
OCI	Other Comprehensive Income (Loss)
OCR	Optimal Customer Relationship
OLEM	Other Loans Especially Mentioned
OREO	Other Real Estate Owned
OTTI	Other-Than-Temporary Impairment
PD	Probability-Of-Default
Plan	Huntington Bancshares Retirement Plan
RBHPCG	Regional Banking and The Huntington Private Client Group
REIT	Real Estate Investment Trust
ROC	Risk Oversight Committee
RWA	Risk-Weighted Assets
SAD	Special Assets Division
SBA	Small Business Administration
SEC	Securities and Exchange Commission

4

SERP	Supplemental Executive Retirement Plan
SRIP	Supplemental Retirement Income Plan
TCE	Tangible Common Equity
TDR	Troubled Debt Restructured Loan
U.S. Treasury	U.S. Department of the Treasury
UCS	Uniform Classification System
UPB	Unpaid Principal Balance
USDA	U.S. Department of Agriculture
VIE	Variable Interest Entity
XBRL	eXtensible Business Reporting Language

5

PART I. FINANCIAL INFORMATION

When we refer to “we”, “our”, and “us”, and "the Company" in this report, we mean Huntington Bancshares Incorporated and our consolidated subsidiaries, unless the context indicates that we refer only to the parent company, Huntington Bancshares Incorporated. When we refer to the “Bank” in this report, we mean our only bank subsidiary, The Huntington National Bank, and its subsidiaries.

Item 2: Management’s Discussion and Analysis of Financial Condition and Results of Operations

INTRODUCTION

We are a multi-state diversified regional bank holding company organized under Maryland law in 1966 and headquartered in Columbus, Ohio. Through the Bank, we have over 150 years of servicing the financial needs of our customers. Through our subsidiaries, we provide full-service commercial and consumer banking services, mortgage banking services, automobile financing, recreational vehicle and marine financing, equipment leasing, investment management, trust services, brokerage services, insurance programs, and other financial products and services. Our 958 branches and private client group offices are located in Ohio, Illinois, Indiana, Kentucky, Michigan, Pennsylvania, West Virginia, and Wisconsin. Select financial services and other activities are also conducted in various other states. International banking services are available through the headquarters office in Columbus, Ohio. Our foreign banking activities, in total or with any individual country, are not significant.

This MD&A provides information we believe necessary for understanding our financial condition, changes in financial condition, results of operations, and cash flows. The MD&A included in our 2016 Form 10-K should be read in conjunction with this MD&A as this discussion provides only material updates to the 2016 Form 10-K. This MD&A should also be read in conjunction with the Unaudited Condensed Consolidated Financial Statements, Notes to Unaudited Condensed Consolidated Financial Statements, and other information contained in this report.

EXECUTIVE OVERVIEW

Summary of 2017 Third Quarter Results Compared to 2016 Third Quarter

For the quarter, we reported net income of $275 million, or $0.23 per common share, compared with $127 million, or $0.11 per common share, in the year-ago quarter (see Table 1). Reported net income was impacted by FirstMerit acquisition-related net expenses totaling $31 million pre-tax, or $0.02 per common share.

Fully-taxable equivalent net interest income was $771 million, up $135 million, or 21%. The results reflected the benefit from a $13.2 billion, or 17%, increase in average earning assets and an 11 basis point improvement in the net interest margin to 3.29%. Average earning asset growth included a $7.6 billion, or 12%, increase in average loans and leases, and a $5.6 billion, or 31%, increase in average securities. The net interest margin expansion reflected a 26 basis point increase in earning asset yields, including an approximate 12 basis point impact of purchase accounting, and a 4 basis point increase in the benefit from noninterest-bearing funds, partially offset by a 19 basis point increase in funding costs.

The provision for credit losses decreased$20 million year-over-year to $44 million in the 2017 third quarter. NCOs increased $3 million to $43 million. NCOs represented an annualized 0.25% of average loans and leases, which remains below our long-term expectation of 35 to 55 basis points.

Non-interest income was $330 million, up $28 million, or 9%. The increase was primarily a result of the FirstMerit acquisition. In addition, card and payment processing income increased due to higher credit and debit card related income and underlying customer growth. Capital markets fees increased reflecting our continued strategic focus on expanding the business.

Non-interest expense was $680 million, down $32 million, or 4%, primarily reflecting the impact of the FirstMerit acquisition. Personnel costs decreased primarily related to acquisition-related personnel expense partially offset by an increase in average full-time equivalent employees. Further, professional services, outside data processing and other services decreased primarily reflecting a net decrease in acquisition-related Significant Items, partially offset by higher card and data processing expense from increased usage. Partially offsetting these decreases, other expense increased primarily reflecting an increase in donations and sponsorships and equipment lease residual impairments.

6

The tangible common equity to tangible assets ratio was 7.42%, up 28 basis points from a year-ago. The CET1 risk-based capital ratio was 9.94% at September 30, 2017, compared to 9.09% a year ago. The regulatory Tier 1 risk-based capital ratio was 11.30% compared to 10.40% at September 30, 2016. All capital ratios were impacted by the repurchase of $123 million of common stock at an average cost of $12.75 per share during the 2017 third quarter. The total risk-based capital ratio was impacted by the repurchase of trust preferred securities during the 2016 fourth quarter.

Business Overview

General

Our general business objectives are:

1.Grow net interest income and fee income.

2.Deliver positive operating leverage.

3.Increase primary customer relationships across all business segments.

4.Continue to strengthen risk management.

5.Maintain capital and liquidity positions consistent with our risk appetite.

Economy

We expect consumer and business optimism to remain high across our footprint. Labor markets and consumer spending are strong with some inflationary pressures. Throughout 2017, consumer loan growth has remained steady. To date manufacturing has benefited the Midwest. Our pipelines support commercial loan growth, although the commercial lending environment is competitive on both structures and rates.

DISCUSSION OF RESULTS OF OPERATIONS

This section provides a review of financial performance from a consolidated perspective. It also includes a “Significant Items” section that summarizes key issues important for a complete understanding of performance trends. Key Unaudited Condensed Consolidated Balance Sheet and Unaudited Condensed Statement of Income trends are discussed. All earnings per share data are reported on a diluted basis. For additional insight on financial performance, please read this section in conjunction with the “Business Segment Discussion.

7

Table 1 - Selected Quarterly Income Statement Data (1)
(dollar amounts in thousands, except per share amounts)
	Three Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,
	2017			2017			2017			2016			2016
Interest income	$	872,987		$	846,424		$	820,360		$	814,858		$	694,346
Interest expense	114,554			101,912			90,385			79,877			68,956
Net interest income	758,433			744,512			729,975			734,981			625,390
Provision for credit losses	43,590			24,978			67,638			74,906			63,805
Net interest income after provision for credit losses	714,843			719,534			662,337			660,075			561,585
Service charges on deposit accounts	90,681			87,582			83,420			91,577			86,847
Cards and payment processing income	53,647			52,485			47,169			49,113			44,320
Mortgage banking income	33,615			32,268			31,692			37,520			40,603
Trust and investment management services	33,531			32,232			33,869			34,016			28,923
Insurance income	13,992			15,843			15,264			16,486			15,865
Brokerage income	14,458			16,294			15,758			17,014			14,719
Capital markets fees	21,719			16,836			14,200			18,730			14,750
Bank owned life insurance income	16,453			15,322			17,542			17,067			14,452
Gain on sale of loans	13,877			12,002			12,822			24,987			7,506
Net securities gains (losses)	(33		)	135			(8		)	(1,771		)	1,031
Other noninterest income	38,157			44,219			40,735			29,598			33,399
Total noninterest income	330,097			325,218			312,463			334,337			302,415
Personnel costs	377,088			391,997			382,000			359,755			405,024
Outside data processing and other services	79,586			75,169			87,202			88,695			91,133
Equipment	45,458			42,924			46,700			59,666			40,792
Net occupancy	55,124			52,613			67,700			49,450			41,460
Professional services	15,227			18,190			18,295			23,165			47,075
Marketing	16,970			18,843			13,923			21,478			14,438
Deposit and other insurance expense	18,514			20,418			20,099			15,772			14,940
Amortization of intangibles	14,017			14,242			14,355			14,099			9,046
Other noninterest expense	58,444			59,968			57,148			49,417			48,339
Total noninterest expense	680,428			694,364			707,422			681,497			712,247
Income before income taxes	364,512			350,388			267,378			312,915			151,753
Provision for income taxes	89,944			78,647			59,284			73,952			24,749
Net income	274,568			271,741			208,094			238,963			127,004
Dividends on preferred shares	18,903			18,889			18,878			18,865			18,537
Net income applicable to common shares	$	255,665		$	252,852		$	189,216		$	220,098		$	108,467
Average common shares—basic	1,086,038			1,088,934			1,086,374			1,085,253			938,578
Average common shares—diluted	1,106,491			1,108,527			1,108,617			1,104,358			952,081
Net income per common share—basic	$	0.24		$	0.23		$	0.17		$	0.20		$	0.12
Net income per common share—diluted	0.23			0.23			0.17			0.20			0.11
Cash dividends declared per common share	0.08			0.08			0.08			0.08			0.07
Return on average total assets	1.08		%	1.09		%	0.84		%	0.95		%	0.58		%
Return on average common shareholders’ equity	10.5			10.6			8.2			9.4			5.4
Return on average tangible common shareholders’ equity (2)	14.1			14.4			11.3			12.9			7.0
Net interest margin (3)	3.29			3.31			3.30			3.25			3.18
Efficiency ratio (4)	60.5			62.9			65.7			61.6			75.0
Effective tax rate	24.7			22.4			22.2			23.6			16.3
Revenue—FTE
Net interest income	$	758,433		$	744,512		$	729,975		$	734,981		$	625,390
FTE adjustment	12,209			12,069			12,058			12,560			10,598
Net interest income (3)	770,642			756,581			742,033			747,541			635,988
Noninterest income	330,097			325,218			312,463			334,337			302,415
Total revenue (3)	$	1,100,739		$	1,081,799		$	1,054,496		$	1,081,878		$	938,403

8

Table 2 - Selected Year to Date Income Statements (1)
	Nine Months Ended September 30,				Change
(dollar amounts in thousands, except per share amounts)	2017		2016		Amount			Percent
Interest income	$	2,539,771	$	1,817,255	$	722,516		40	%
Interest expense	306,851		182,918		123,933			68
Net interest income	2,232,920		1,634,337		598,583			37
Provision for credit losses	136,206		115,896		20,310			18
Net interest income after provision for credit losses	2,096,714		1,518,441		578,273			38
Service charges on deposit accounts	261,683		232,722		28,961			12
Cards and payment processing income	153,301		119,951		33,350			28
Mortgage banking income	97,575		90,737		6,838			8
Trust and investment management services	99,633		74,258		25,375			34
Insurance income	45,099		48,037		(2,938		)	(6	)
Brokerage income	46,510		44,819		1,691			4
Capital markets fees	52,755		40,797		11,958			29
Bank owned life insurance income	49,317		40,500		8,817			22
Gain on sale of loans	38,701		22,166		16,535			75
Net securities gains (losses)	94		1,687		(1,593		)	(94	)
Other noninterest income	123,110		99,720		23,390			23
Total noninterest income	967,778		815,394		152,384			19
Personnel costs	1,151,085		989,369		161,716			16
Outside data processing and other services	241,957		216,047		25,910			12
Equipment	135,082		105,173		29,909			28
Net occupancy	175,437		103,640		71,797			69
Professional services	51,712		82,101		(30,389		)	(37	)
Marketing	49,736		41,479		8,257			20
Deposit and other insurance expense	59,031		38,335		20,696			54
Amortization of intangibles	42,614		16,357		26,257			161
Other noninterest expense	175,560		134,487		41,073			31
Total noninterest expense	2,082,214		1,726,988		355,226			21
Income before income taxes	982,278		606,847		375,431			62
Provision for income taxes	227,875		133,989		93,886			70
Net income	754,403		472,858		281,545			60
Dividends declared on preferred shares	56,670		46,409		10,261			22
Net income applicable to common shares	$	697,733	$	426,449	$	271,284		64	%
Average common shares—basic	1,087,115		844,167		242,948			29	%
Average common shares—diluted	1,107,878		856,934		250,944			29
Net income per common share—basic	$	0.64	$	0.51	$	0.13		25
Net income per common share—diluted	0.63		0.50		0.13			26
Cash dividends declared per common share	0.24		0.21		0.03			14
Revenue—FTE
Net interest income	$	2,232,920	$	1,634,337	$	598,583		37	%
FTE adjustment	36,336		29,848		6,488			22
Net interest income (3)	2,269,256		1,664,185		605,071			36
Noninterest income	967,778		815,394		152,384			19
Total revenue (3)	$	3,237,034	$	2,479,579	$	757,455		31	%

(1) Comparisons for presented periods are impacted by a number of factors. Refer to the “Significant Items” for additional discussion regarding these key factors.

(2) Net income excluding expense for amortization of intangibles for the period divided by average tangible common shareholders’ equity. Average tangible common shareholders’ equity equals average total common shareholders’ equity less average intangible assets and goodwill. Expense for amortization of intangibles and average intangible assets are net of deferred tax liability, and calculated assuming a 35% tax rate.

(3) On a fully-taxable equivalent (FTE) basis assuming a 35% tax rate.

(4) Noninterest expense less amortization of intangibles and goodwill impairment divided by the sum of FTE net interest income and noninterest income excluding securities gains.

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Significant Items

Earnings comparisons are impacted by the Significant Items summarized below:

Mergers and Acquisitions. Significant events relating to mergers and acquisitions, and the impacts of those events on our reported results, are as follows:

• During the 2017third quarter, $31 million of noninterest expense was recorded related to the acquisition of FirstMerit. This resulted in a negative impact of $0.02 per common share.

• During the 2017 second quarter, $50 million of noninterest expense was recorded related to the acquisition of FirstMerit. This resulted in a negative impact of $0.03 per common share.

• During the2016third quarter,$159 millionof noninterest expense was recorded related to the then pending acquisition of FirstMerit. This resulted in a negative impact of $0.11 per common share.

The following table reflects the earnings impact of the above-mentioned Significant Items for periods affected:

Table 3 - Significant Items Influencing Earnings Performance Comparison
(dollar amounts in thousands, except per share amounts)
	Three Months Ended
	September 30, 2017						June 30, 2017						September 30, 2016
	Amount			EPS (1)			Amount			EPS (1)			Amount			EPS (1)
Net income	$	274,568					$	271,741					$	127,004
Earnings per share, after-tax				$	0.23					$	0.23					$	0.11
Significant Items—favorable (unfavorable) impact:	Earnings			EPS (1)			Earnings			EPS (1)			Earnings			EPS (1)
Mergers and acquisitions, net expenses	$	(30,733	)				$	(50,243	)				$	(158,749	)
Tax impact	10,757						17,585						52,033
Mergers and acquisitions, after-tax	$	(19,976	)	$	(0.02	)	$	(32,658	)	$	(0.03	)	$	(106,716	)	$	(0.11	)

(1) Based upon the quarterly average outstanding diluted common shares.

	Nine Months Ended
	September 30, 2017						September 30, 2016
	Amount			EPS (1)			Amount			EPS (1)
Net income	$	754,403					$	472,858
Earnings per share, after-tax				$	0.63					$	0.50
Significant Items—favorable (unfavorable) impact:	Earnings			EPS (1)			Earnings			EPS (1)
Mergers and acquisitions, net expenses	$	(152,121	)				$	(185,944	)
Tax impact	53,243						61,252
Mergers and acquisitions, after-tax	$	(98,878	)	$	(0.09	)	$	(124,692	)	$	(0.14	)

(1) Based upon the year to date average outstanding diluted common shares.

10

Net Interest Income / Average Balance Sheet

The following tables detail the change in our average balance sheet and the net interest margin:

Table 4 - Consolidated Average Balance Sheet and Net Interest Margin Analysis
	Average Balances
(dollar amounts in millions)	Three Months Ended															Change
	September 30,			June 30,			March 31,			December 31,			September 30,			3Q17 vs. 3Q16
	2017			2017			2017			2016			2016			Amount			Percent
Assets:
Interest-bearing deposits in banks	$	102		$	102		$	100		$	110		$	95		$	7		8	%
Loans held for sale	678			525			415			2,507			695			(17		)	(2	)
Securities:
Available-for-sale and other securities:
Taxable	12,275			13,135			12,801			13,734			9,785			2,490			25
Tax-exempt	3,161			3,104			3,049			3,136			2,854			307			11
Total available-for-sale and other securities	15,436			16,239			15,850			16,870			12,639			2,797			22
Trading account securities	92			91			137			139			49			43			88
Held-to-maturity securities—taxable	8,264			7,427			7,656			5,432			5,487			2,777			51
Total securities	23,793			23,756			23,643			22,441			18,175			5,618			31
Loans and leases: (1)
Commercial:
Commercial and industrial	27,643			27,992			27,922			27,727			24,957			2,686			11
Commercial real estate:
Construction	1,152			1,130			1,314			1,413			1,132			20			2
Commercial	6,064			5,940			6,039			5,805			5,227			837			16
Commercial real estate	7,216			7,070			7,353			7,218			6,359			857			13
Total commercial	34,859			35,062			35,276			34,945			31,316			3,543			11
Consumer:
Automobile	11,713			11,324			11,063			10,866			11,402			311			3
Home equity	9,960			9,958			10,072			10,101			9,260			700			8
Residential mortgage	8,402			7,979			7,777			7,690			7,012			1,390			20
RV and marine finance	2,296			2,039			1,874			1,844			915			1,381			151
Other consumer	1,046			983			919			959			817			229			28
Total consumer	33,417			32,283			31,705			31,460			29,406			4,011			14
Total loans and leases	68,276			67,345			66,981			66,405			60,722			7,554			12
Allowance for loan and lease losses	(672		)	(672		)	(636		)	(614		)	(623		)	(49		)	8
Net loans and leases	67,604			66,673			66,345			65,791			60,099			7,505			12
Total earning assets	92,849			91,728			91,139			91,463			79,687			13,162			17
Cash and due from banks	1,299			1,287			2,011			1,538			1,325			(26		)	(2	)
Intangible assets	2,359			2,373			2,387			2,421			1,547			812			52
All other assets	5,455			5,405			5,442			5,559			4,962			493			10
Total assets	$	101,290		$	100,121		$	100,343		$	100,367		$	86,898		$	14,392		17	%
Liabilities and Shareholders’ Equity:
Deposits:
Demand deposits—noninterest-bearing	$	21,723		$	21,599		$	21,730		$	23,250		$	20,033		$	1,690		8	%
Demand deposits—interest-bearing	17,878			17,445			16,805			15,294			12,362			5,516			45
Total demand deposits	39,601			39,044			38,535			38,544			32,395			7,206			22
Money market deposits	20,314			19,212			18,653			18,618			18,453			1,861			10
Savings and other domestic deposits	11,590			11,889			11,970			12,272			8,889			2,701			30
Core certificates of deposit	2,044			2,146			2,342			2,636			2,285			(241		)	(11	)
Total core deposits	73,549			72,291			71,500			72,070			62,022			11,527			19
Other domestic time deposits of $250,000 or more	432			479			470			391			382			50			13
Brokered deposits and negotiable CDs	3,563			3,783			3,969			4,273			3,904			(341		)	(9	)
Deposits in foreign offices	—			—			—			152			194			(194		)	—
Total deposits	77,544			76,553			75,939			76,886			66,502			11,042			17
Short-term borrowings	2,391			2,687			3,792			2,628			1,306			1,085			83
Long-term debt	8,949			8,730			8,529			8,594			8,488			461			5
Total interest-bearing liabilities	67,161			66,371			66,530			64,858			56,263			10,898			19
All other liabilities	1,661			1,557			1,661			1,833			1,608			53			3
Shareholders’ equity	10,745			10,594			10,422			10,426			8,994			1,751			19
Total liabilities and shareholders’ equity	$	101,290		$	100,121		$	100,343		$	100,367		$	86,898		$	14,392		17	%

11

Table 4 - Consolidated Average Balance Sheet and Net Interest Margin Analysis (Continued)
	Average Yield Rates (2)
	Three Months Ended
	September 30,		June 30,		March 31,		December 31,		September 30,
Fully-taxable equivalent basis (3)	2017		2017		2017		2016		2016
Assets:
Interest-bearing deposits in banks	1.77	%	1.53	%	1.09	%	0.64	%	0.64	%
Loans held for sale	3.83		3.73		3.82		2.95		3.53
Securities:
Available-for-sale and other securities:
Taxable	2.42		2.38		2.38		2.43		2.35
Tax-exempt	3.62		3.71		3.77		3.60		3.01
Total available-for-sale and other securities	2.67		2.64		2.65		2.65		2.50
Trading account securities	0.16		0.25		0.11		0.18		0.58
Held-to-maturity securities—taxable	2.36		2.38		2.36		2.43		2.41
Total securities	2.55		2.55		2.54		2.58		2.47
Loans and leases: (1)
Commercial:
Commercial and industrial	4.05		4.04		3.98		3.83		3.68
Commercial real estate:
Construction	4.55		4.26		3.95		3.65		3.76
Commercial	4.08		3.97		3.69		3.54		3.54
Commercial real estate	4.16		4.02		3.74		3.56		3.58
Total commercial	4.07		4.04		3.93		3.78		3.66
Consumer:
Automobile	3.60		3.55		3.55		3.57		3.37
Home equity	4.72		4.61		4.45		4.24		4.21
Residential mortgage	3.65		3.66		3.63		3.58		3.61
RV and marine finance	5.43		5.57		5.63		5.64		5.70
Other consumer	11.59		11.47		12.05		10.91		10.93
Total consumer	4.32		4.27		4.23		4.13		3.97
Total loans and leases	4.20		4.15		4.07		3.95		3.81
Total earning assets	3.78		3.75		3.70		3.60		3.52
Liabilities:
Deposits:
Demand deposits—noninterest-bearing	—		—		—		—		—
Demand deposits—interest-bearing	0.23		0.20		0.15		0.11		0.11
Total demand deposits	0.10		0.09		0.07		0.04		0.04
Money market deposits	0.36		0.31		0.26		0.24		0.24
Savings and other domestic deposits	0.20		0.21		0.22		0.25		0.21
Core certificates of deposit	0.73		0.56		0.39		0.29		0.43
Total core deposits	0.30		0.26		0.22		0.20		0.20
Other domestic time deposits of $250,000 or more	0.61		0.49		0.45		0.39		0.40
Brokered deposits and negotiable CDs	1.16		0.95		0.72		0.48		0.44
Deposits in foreign offices	—		—		—		0.13		0.13
Total deposits	0.35		0.31		0.26		0.23		0.22
Short-term borrowings	0.95		0.78		0.63		0.36		0.29
Long-term debt	2.65		2.49		2.33		2.19		1.97
Total interest-bearing liabilities	0.68		0.61		0.54		0.48		0.49
Net interest rate spread	3.10		3.14		3.16		3.12		3.03
Impact of noninterest-bearing funds on margin	0.19		0.17		0.14		0.13		0.15
Net interest margin	3.29	%	3.31	%	3.30	%	3.25	%	3.18	%

(1) For purposes of this analysis, NALs are reflected in the average balances of loans.

(2) Loan and lease and deposit average rates include impact of applicable derivatives, non-deferrable fees, and amortized fees.

(3) FTE yields are calculated assuming a 35% tax rate.

12

2017 Third Quarter versus 2016 Third Quarter

Fully-taxable equivalent (FTE) net interest income for the 2017 third quarterincreased$135 million, or 21%, from the 2016 third quarter. This reflected the benefit from the $13.2 billion, or 17%, increase in average earning assets coupled with an 11 basis point improvement in the FTE net interest margin (NIM) to 3.29%. Average earning asset growth included a $7.6 billion, or 12%, increase in average loans and leases and a $5.6 billion, or 31%, increase in average securities.The NIM expansion reflected a 26 basis point increase related to the mix and yield of earning assets and a 4 basis point increase in the benefit from noninterest-bearing funds, partially offset by a 19 basis point increase in funding costs. FTE net interest income during the 2017 third quarter included $27 million, or approximately 12 basis points, of purchase accounting impact.

Average earning assets for the 2017 third quarterincreased$13.2 billion, or 17%, from the year-ago quarter, primarily reflecting the impact of the FirstMerit acquisition. Average securities increased $5.6 billion, or 31%, which included a $0.3 billion increase in direct purchase municipal instruments in our commercial banking segment. Average residential mortgage loans increased $1.4 billion, or 20%, as we continue to see the benefits associated with the expansion of our home lending business. Average RV and marine finance loans increased$1.4 billion, or 151%, reflecting the expansion of the acquired business into 17 new states over the past year.

Average total deposits for the 2017 third quarterincreased$11.0 billion, or 17%, from the year-ago quarter, while average total core deposits increased$11.5 billion, or 19%. Average total interest-bearing liabilities increased$10.9 billion, or 19%, from the year-ago quarter. These increases primarily reflect the impact of the FirstMerit acquisition. Average demand deposits increased $7.2 billion, or 22%, comprised of a $5.1 billion, or 24%, increase in average commercial demand deposits and a $2.1 billion, or 20%, increase in average consumer demand deposits. Average long-term borrowings increased $0.5 billion, or 5%, reflecting the issuance of $2.7 billion and maturity of $1.6 billion of senior debt over the past five quarters.

2017 Third Quarter versus 2017 Second Quarter

Compared to the 2017 second quarter, FTE net interest income increased $14 million, or 2%. Average earning assets increased $1.1 billion, or 1%, sequentially, while the NIM decreased 2 basis points.The decrease in the NIM reflected a 7 basis point increase in the cost of interest-bearing liabilities, partially offset by a 3 basis point increase in earning asset yields and a 2 basis point increase in the benefit from noninterest-bearing funds. The purchase accounting impact on the net interest margin was approximately 12 basis points in the 2017 third quarter compared to approximately 15 basis points in the prior quarter.

Compared to the 2017 second quarter, average earning assets increased$1.1 billion, or 1%. Average loans and leases increased$0.9 billion, or 1%, primarily reflecting growth in residential mortgage, automobile, and RV and marine loans partially offset by a decline in average commercial and industrial loans. Average commercial and industrial loans were negatively impacted by the seasonal decline in automobile floorplan lending, a reduction in mortgage warehouse lending, and continued runoff in corporate banking, partially offset by growth in asset finance.

Compared to the 2017 second quarter, average total core deposits increased$1.3 billion, or 2%, primarily reflecting a $1.1 billion, or 6%, increase in money market deposits and a $0.6 billion, or 1%, increase in average demand deposits.

13

Table 5 - Consolidated YTD Average Balance Sheets and Net Interest Margin Analysis
(dollar amounts in millions)	YTD Average Balances											YTD Average Rates (2)
	Nine Months Ended September 30,						Change					Nine Months Ended September 30,
Fully-taxable equivalent basis (1)	2017			2016			Amount			Percent		2017		2016
Assets:
Interest-bearing deposits in banks	$	102		$	97		$	5		5	%	1.46	%	0.37	%
Loans held for sale	540			567			(27		)	(5	)	3.79		3.76
Securities:
Available-for-sale and other securities:
Taxable	12,735			7,781			4,954			64		2.40		2.37
Tax-exempt	3,105			2,576			529			21		3.70		3.25
Total available-for-sale and other securities	15,840			10,357			5,483			53		2.65		2.59
Trading account securities	107			43			64			149		0.17		0.68
Held-to-maturity securities—taxable	7,785			5,781			2,004			35		2.37		2.43
Total securities	23,732			16,181			7,551			47		2.55		2.53
Loans and leases: (3)
Commercial:
Commercial and industrial	27,852			22,326			5,526			25		4.03		3.57
Commercial real estate:
Construction	1,198			979			219			22		4.24		3.66
Commercial	6,014			4,621			1,393			30		3.92		3.50
Commercial real estate	7,212			5,600			1,612			29		3.97		3.52
Total commercial	35,064			27,926			7,138			26		4.01		3.56
Consumer:
Automobile	11,369			10,430			939			9		3.57		3.24
Home equity	9,983			8,708			1,275			15		4.60		4.19
Residential mortgage	8,055			6,406			1,649			26		3.65		3.65
RV and marine finance	2,071			307			1,764			575		5.54		5.70
Other consumer	997			670			327			49		11.53		10.46
Total consumer	32,475			26,521			5,954			22		4.27		3.86
Total loans and leases	67,539			54,447			13,092			24		4.14		3.71
Allowance for loan and lease losses	(660		)	(614		)	(46		)	7
Net loans and leases	66,879			53,833			13,046			24
Total earning assets	91,913			71,292			20,621			29		3.75	%	3.46	%
Cash and due from banks	1,530			1,114			416			37
Intangible assets	2,373			1,003			1,370			137
All other assets	5,433			4,446			987			22
Total assets	$	100,589		$	77,241		$	23,348		30	%
Liabilities and Shareholders’ Equity:
Deposits:
Demand deposits—noninterest-bearing	$	21,684		$	17,634		$	4,050		23	%	—	%	—	%
Demand deposits—interest-bearing	17,380			9,538			7,842			82		0.20		0.10
Total demand deposits	39,064			27,172			11,892			44		0.09		0.03
Money market deposits	19,399			19,220			179			1		0.31		0.24
Savings and other domestic deposits	11,815			6,541			5,274			81		0.21		0.16
Core certificates of deposit	2,176			2,186			(10		)	—		0.55		0.67
Total core deposits	72,454			55,119			17,335			31		0.26		0.21
Other domestic time deposits of $250,000 or more	460			413			47			11		0.51		0.40
Brokered deposits and negotiable CDs	3,770			3,239			531			16		0.93		0.41
Deposits in foreign offices	—			222			(222		)	—		—		0.13
Total deposits	76,684			58,993			17,691			30		0.31		0.23
Short-term borrowings	2,952			1,161			1,791			154		0.76		0.32
Long-term debt	8,738			7,866			872			11		2.49		1.84
Total interest-bearing liabilities	66,690			50,386			16,304			32		0.61		0.48
All other liabilities	1,627			1,513			114			8
Shareholders’ equity	10,588			7,708			2,880			37
Total liabilities and shareholders’ equity	$	100,589		$	77,241		$	23,348		30	%
Net interest rate spread												3.13		2.98
Impact of noninterest-bearing funds on margin												0.17		0.14
Net interest margin												3.30	%	3.12	%

(1) FTE yields are calculated assuming a 35% tax rate.

(2) Loan, lease, and deposit average rates include the impact of applicable derivatives, non-deferrable fees, and amortized deferred fees.

(3) For purposes of this analysis, nonaccrual loans are reflected in the average balances of loans.

14

2017 First Nine Months versus 2016 First Nine Months

FTE net interest income for the first nine-month period of 2017increased$605 million, or 36%. This reflected the benefit of a $20.6 billion, or 29%, increase in average total earning assets coupled with a FTE net interest margin, which increased to 3.30% from 3.12%. Average securities increased $7.6 billion, or 47%, primarily reflecting the acquisition of FirstMerit and an increase in direct purchase municipal instruments in our commercial banking segment. Average loans and leases increased$13.1 billion, or 24%, primarily reflecting an increase in C&I lending, residential mortgage loans and RV and marine finance resulting from the acquisition of FirstMerit.

Provision for Credit Losses

(This section should be read in conjunction with the Credit Risk section.)

The provision for credit losses is the expense necessary to maintain the ALLL and the AULC at levels appropriate to absorb our estimate of credit losses in the loan and lease portfolio and the portfolio of unfunded loan commitments and letters-of-credit.

The provision for credit losses for the 2017 third quarter was $44 million, which decreased$20 million, or 32%, compared to the third quarter2016. NCOs increased$3 million to $43 million compared with the same period in the prior year reflecting an increase in consumer net charge-offs, partially offset by a decrease in commercial net charge-offs. Net charge-offs represented an annualized 0.25% of average loans and leases, which remains below our long-term expectation of 35 to 55 basis points.

On a year-to-date basis, provision for credit losses for the first nine-month period of 2017 was $136 million, an increase of $20 million, or 18%, compared to the year-ago period, reflecting increased net charge-offs due to portfolio loan growth.

Noninterest Income

The following table reflects noninterest income for each of the periods presented: 

Table 6 - Noninterest Income
	Three Months Ended							3Q17 vs. 3Q16					3Q17 vs. 2Q17
	September 30,			June 30,		September 30,		Change					Change
(dollar amounts in thousands)	2017			2017		2016		Amount			Percent		Amount			Percent
Service charges on deposit accounts	$	90,681		$	87,582	$	86,847	$	3,834		4	%	$	3,099		4	%
Cards and payment processing income	53,647			52,485		44,320		9,327			21		1,162			2
Mortgage banking income	33,615			32,268		40,603		(6,988		)	(17	)	1,347			4
Trust and investment management services	33,531			32,232		28,923		4,608			16		1,299			4
Insurance income	13,992			15,843		15,865		(1,873		)	(12	)	(1,851		)	(12	)
Brokerage income	14,458			16,294		14,719		(261		)	(2	)	(1,836		)	(11	)
Capital markets fees	21,719			16,836		14,750		6,969			47		4,883			29
Bank owned life insurance income	16,453			15,322		14,452		2,001			14		1,131			7
Gain on sale of loans	13,877			12,002		7,506		6,371			85		1,875			16
Net securities gains (losses)	(33		)	135		1,031		(1,064		)	(103	)	(168		)	(124	)
Other noninterest income	38,157			44,219		33,399		4,758			14		(6,062		)	(14	)
Total noninterest income	$	330,097		$	325,218	$	302,415	$	27,682		9	%	$	4,879		2	%

2017 Third Quarter versus 2016 Third Quarter

Noninterest income for the 2017 third quarterincreased$28 million, or 9%, from the year-ago quarter, primarily reflecting the impact of the FirstMerit acquisition. Card and payment processing income increased$9 million, or 21%, due to higher credit and debit card related income and underlying customer growth. Capital markets fees increased$7 million, or 47%, reflecting our ongoing strategic focus on expanding the business. Gain on sale of loans increased$6 million, or 85%, as a result of continued expansion of our SBA lending business. Other income increased$5 million, or 14%, primarily reflecting a $5 million benefit from derivative ineffectiveness and a $3 million increase in servicing income. These increases were partially offset by a $7 million decline in mortgage banking income due to lower spreads on origination volume.

15

2017 Third Quarter versus 2017 Second Quarter

Compared to the 2017 second quarter, total noninterest income increased$5 million, or 2%. Capital markets fees increased$5 million, or 29%, as a result of the previously-mentioned expansion of the business. Conversely, other income decreased$6 million, or 14%, primarily reflecting a decrease in loan syndication fees.

Table 7 - Noninterest Income—2017 First Nine Months vs. 2016 First Nine Months
	Nine Months Ended September 30,				Change
(dollar amounts in thousands)	2017		2016		Amount			Percent
Service charges on deposit accounts	$	261,683	$	232,722	$	28,961		12	%
Cards and payment processing income	153,301		119,951		33,350			28
Mortgage banking income	97,575		90,737		6,838			8
Trust and investment management services	99,633		74,258		25,375			34
Insurance income	45,099		48,037		(2,938		)	(6	)
Brokerage income	46,510		44,819		1,691			4
Capital markets fees	52,755		40,797		11,958			29
Bank owned life insurance income	49,317		40,500		8,817			22
Gain on sale of loans	38,701		22,166		16,535			75
Net securities gains (losses)	94		1,687		(1,593		)	(94	)
Other noninterest income	123,110		99,720		23,390			23
Total noninterest income	$	967,778	$	815,394	$	152,384		19	%

Noninterest income for the first nine-month period of 2017increased$152 million, or 19%, from the year-ago period, primarily reflecting the impact of the FirstMerit acquisition. Service charges on deposit accounts increased $29 million, or 12%, reflecting the benefit of the FirstMerit acquisition and continued new customer acquisition. Cards and payment processing income increased $33 million, or 28%, due to an increase in credit and debit card transactions and underlying customer growth. Trust and investment management services increased $25 million, or 34%, primarily reflecting an increase in assets under management as a result of the FirstMerit acquisition.

Noninterest Expense

(This section should be read in conjunction with Significant Items 1.)

The following table reflects noninterest expense for each of the periods presented:

Table 8 - Noninterest Expense
	Three Months Ended						3Q17 vs. 3Q16					3Q17 vs. 2Q17
	September 30,		June 30,		September 30,		Change					Change
(dollar amounts in thousands)	2017		2017		2016		Amount			Percent		Amount			Percent
Personnel costs	$	377,088	$	391,997	$	405,024	$	(27,936	)	(7	)%	$	(14,909	)	(4	)%
Outside data processing and other services	79,586		75,169		91,133		(11,547		)	(13	)	4,417			6
Equipment	45,458		42,924		40,792		4,666			11		2,534			6
Net occupancy	55,124		52,613		41,460		13,664			33		2,511			5
Professional services	15,227		18,190		47,075		(31,848		)	(68	)	(2,963		)	(16	)
Marketing	16,970		18,843		14,438		2,532			18		(1,873		)	(10	)
Deposit and other insurance expense	18,514		20,418		14,940		3,574			24		(1,904		)	(9	)
Amortization of intangibles	14,017		14,242		9,046		4,971			55		(225		)	(2	)
Other noninterest expense	58,444		59,968		48,339		10,105			21		(1,524		)	(3	)
Total noninterest expense	$	680,428	$	694,364	$	712,247	$	(31,819	)	(4	)%	$	(13,936	)	(2	)%
Number of employees (average full-time equivalent)	15,508		15,877		14,511		997			7	%	(369		)	(2	)%

16

Impacts of Significant Items:

	Three Months Ended
	September 30,		June 30,		September 30,
(dollar amounts in thousands)	2017		2017		2016
Personnel costs	$	4,362	$	17,934	$	76,199
Outside data processing and other services	3,304		6,246		27,639
Equipment	6,505		3,994		4,739
Net occupancy	14,255		14,415		7,116
Professional services	2,038		3,804		33,679
Marketing	17		112		926
Other noninterest expense	252		3,738		8,451
Total noninterest expense adjustments	$	30,733	$	50,243	$	158,749

Adjusted Noninterest Expense (See Non-GAAP Financial Measures in the Additional Disclosures section):

	Three Months Ended						3Q17 vs. 3Q16					3Q17 vs. 2Q17
	September 30,		June 30,		September 30,		Change					Change
(dollar amounts in thousands)	2017		2017		2016		Amount			Percent		Amount			Percent
Personnel costs	$	372,726	$	374,063	$	328,825	$	43,901		13	%	$	(1,337	)	—	%
Outside data processing and other services	76,282		68,923		63,494		12,788			20		7,359			11
Equipment	38,953		38,930		36,053		2,900			8		23			—
Net occupancy	40,869		38,198		34,344		6,525			19		2,671			7
Professional services	13,189		14,386		13,396		(207		)	(2	)	(1,197		)	(8	)
Marketing	16,953		18,731		13,512		3,441			25		(1,778		)	(9	)
Deposit and other insurance expense	18,514		20,418		14,940		3,574			24		(1,904		)	(9	)
Amortization of intangibles	14,017		14,242		9,046		4,971			55		(225		)	(2	)
Other noninterest expense	58,192		56,230		39,888		18,304			46		1,962			3
Total adjusted noninterest expense (Non-GAAP)	$	649,695	$	644,121	$	553,498	$	96,197		17	%	$	5,574		1	%

2017 Third Quarter versus 2016 Third Quarter

Reported noninterest expense for the 2017 third quarterdecreased$32 million, or 4%, from the year-ago quarter, primarily reflecting the year-over-year decrease in FirstMerit acquisition-related Significant Items. Personnel costs decreased$28 million, or 7%, primarily reflecting a $72 million net decrease in acquisition-related personnel expense partially offset by a 7% increase in average full-time equivalent employees. Professional services decreased$32 million, or 68%, reflecting the net decrease in Significant Items. Outside data processing and other services decreased$12 million, or 13%, reflecting the $24 million net decrease in Significant Items partially offset by higher card and data processing expense from increased usage. Partially offsetting these decreases, other expense increased$10 million, or 21%, primarily reflecting a $5 million increase in donations and sponsorships and a $3 million impairment of certain equipment lease residuals. The 2017 third quarter noninterest expense also included approximately $12 million of nonrecurring net expense, not included in Significant Items, from personnel, operational, and efficiency improvement efforts, including the previously announced consolidation of 38 full-service branches, 7 drive-through only locations, and 3 corporate offices.

2017 Third Quarter versus 2017 Second Quarter

Reported noninterest expense decreased$14 million, or 2%, from the 2017 second quarter, including a $20 million net decrease in Significant Items. Personnel costs decreased$15 million, or 4%, reflecting a $14 million net decrease in acquisition-related expenses.

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Table 9 - Noninterest Expense—2017 First Nine Months vs. 2016 First Nine Months
	Nine Months Ended September 30,				Change
(dollar amounts in thousands)	2017		2016		Amount			Percent
Personnel costs	$	1,151,085	$	989,369	$	161,716		16	%
Outside data processing and other services	241,957		216,047		25,910			12
Equipment	135,082		105,173		29,909			28
Net occupancy	175,437		103,640		71,797			69
Professional services	51,712		82,101		(30,389		)	(37	)
Marketing	49,736		41,479		8,257			20
Deposit and other insurance expense	59,031		38,335		20,696			54
Amortization of intangibles	42,614		16,357		26,257			161
Other noninterest expense	175,560		134,487		41,073			31
Total noninterest expense	$	2,082,214	$	1,726,988	$	355,226		21	%

Impacts of Significant Items:

	Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016
Personnel costs	$	41,851	$	81,405
Outside data processing and other services	24,025		31,047
Equipment	16,262		4,743
Net occupancy	52,012		7,626
Professional services	10,060		48,676
Marketing	945		1,180
Other noninterest expense	9,116		11,267
Total noninterest expense adjustments	$	154,271	$	185,944

Adjusted Noninterest Expense (See Non-GAAP Financial Measures in Additional Disclosures section):

	Nine Months Ended September 30,				Change
(dollar amounts in thousands)	2017		2016		Amount		Percent
Personnel costs	$	1,109,234	$	907,964	$	201,270	22	%
Outside data processing and other services	217,932		185,000		32,932		18
Equipment	118,820		100,430		18,390		18
Net occupancy	123,425		96,014		27,411		29
Professional services	41,652		33,425		8,227		25
Marketing	48,791		40,299		8,492		21
Deposit and other insurance expense	59,031		38,335		20,696		54
Amortization of intangibles	42,614		16,357		26,257		161
Other noninterest expense	166,444		123,220		43,224		35
Total adjusted noninterest expense (Non-GAAP)	$	1,927,943	$	1,541,044	$	386,899	25	%

Reported noninterest expense increased$355 million, or 21%, from the year-ago period, primarily reflecting the impact of the FirstMerit acquisition, including Significant Items. Personnel costs increased $162 million, or 16%, primarily reflecting a 21% increase in the number of average full-time equivalent employees largely related to the additional colleagues during the integration and conversion of FirstMerit as well as the in-store branch expansion. Net occupancy expense increased $72 million, or 69%, largely due to an increase of $44 million of acquisition-related expense. Outside data processing and other services increased $26 million, or 12%, primarily reflecting higher card and data processing expense from increased usage partially offset by a decline in acquisition-related expenses. Deposit and other insurance expense increased $21 million, or 54%, reflecting the larger assessment based and the FDIC Large Institution Surcharge implemented during the 2016 third quarter. Other noninterest expense increased $41 million, or 31%, reflecting the impact of the acquisition as well as a $5 million

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increase in donations and sponsorships and a $3 million impairment on certain equipment lease residuals. These increases were partially offset by a decrease of $30 million, or 37%, in professional services reflecting a $39 million decrease in acquisition-related expenses.

Provision for Income Taxes

The provision for income taxes in the 2017 third quarter was $90 million. This compared with a provision for income taxes of $25 million in the 2016 third quarter and $79 million in the 2017 second quarter. The provision for income taxes for the nine month periods ended September 30, 2017 and September 30, 2016 was $228 million and $134 million, respectively. All periods included the benefits from tax-exempt income, tax-advantaged investments, general business credits, investments in qualified affordable housing projects, excess tax deductions for stock-based compensation, and capital losses. The effective tax rates for the 2017 third quarter, 2016 third quarter, and 2017 second quarter were 24.7%, 16.3%, and 22.4%, respectively. The effective tax rates for the nine-month periods ended September 30, 2017 and September 30, 2016 were 23.2% and 22.1%, respectively. The variance between the 2017 third quarter compared to the 2016 third quarter and 2017 second quarter and for the nine-month period ended September 30, 2017 compared to the nine-month period ended September 30, 2016 in the provision for income taxes and effective tax rates relates primarily to the Significant Items. The net federal deferred tax asset was $29 million and the net state deferred tax asset was $35 million at September 30, 2017.

We file income tax returns with the IRS and various state, city, and foreign jurisdictions. Federal income tax audits have been completed for tax years through 2009. The IRS is currently examining our 2010 and 2011 consolidated federal income tax returns. While the statute of limitations remains open for tax years 2012-2016, the IRS has advised that tax years 2012-2014 will not be audited, and plans to begin the examination of the 2015 federal income tax return during the 2017 fourth quarter. Various state and other jurisdictions remain open to examination, including Ohio, Kentucky, Indiana, Michigan, Pennsylvania, West Virginia, Wisconsin, and Illinois.

RISK MANAGEMENT AND CAPITAL

We use a multi-faceted approach to risk governance. It begins with the board of directors defining our risk appetite as aggregate moderate-to-low. Risk awareness, identification and assessment, reporting, and active management are key elements in overall risk management. Controls include, among others, effective segregation of duties, access, authorization and reconciliation procedures, as well as staff education and a disciplined assessment process.

We believe that our primary risk exposures are credit, market, liquidity, operational, and compliance oriented. More information on risk can be found in the Risk Factors section included in Item 1A of our 2016 Form 10-K and subsequent filings with the SEC. The MD&A included in our 2016 Form 10-K should be read in conjunction with this MD&A as this discussion provides only material updates to the Form 10-K. This MD&A should also be read in conjunction with the financial statements, notes and other information contained in this report. Our definition, philosophy, and approach to risk management have not materially changed from the discussion presented in the 2016 Form 10-K.

Credit Risk

Credit risk is the risk of financial loss if a counterparty is not able to meet the agreed upon terms of the financial obligation. The majority of our credit risk is associated with lending activities, as the acceptance and management of credit risk is central to profitable lending. We also have credit risk associated with our AFS and HTM securities portfolios (see Note 4 and Note 5 of the Notes to the Unaudited Condensed Consolidated Financial Statements). We engage with other financial counterparties for a variety of purposes including investing, asset and liability management, mortgage banking, and trading activities. While there is credit risk associated with derivative activity, we believe this exposure is minimal.

We continue to focus on the identification, monitoring, and managing of our credit risk. In addition to the traditional credit risk mitigation strategies of credit policies and processes, market risk management activities, and portfolio diversification, we use quantitative measurement capabilities utilizing external data sources, enhanced modeling technology, and internal stress testing processes. Our portfolio management resources demonstrate our commitment to maintaining an aggregate moderate-to-low risk profile. In our efforts to continue to identify risk mitigation techniques, we have focused on product design features, origination policies, and solutions for delinquent or stressed borrowers.

Loan and Lease Credit Exposure Mix

Refer to the “Loan and Lease Credit Exposure Mix” section of our 2016 Form 10-K for a brief description of each portfolio segment.

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The table below provides the composition of our total loan and lease portfolio:

Table 10 - Loan and Lease Portfolio Composition
(dollar amounts in millions)	September 30, 2017				June 30, 2017				March 31, 2017				December 31, 2016				September 30, 2016
Ending Balances by Type:
Commercial:
Commercial and industrial	$	27,469	40	%	$	27,969	41	%	$	28,176	42	%	$	28,059	42	%	$	27,668	42	%
Commercial real estate:
Construction	1,182		2		1,145		2		1,107		2		1,446		2		1,414		2
Commercial	6,024		9		6,000		9		5,986		9		5,855		9		5,842		9
Commercial real estate	7,206		11		7,145		11		7,093		11		7,301		11		7,256		11
Total commercial	34,675		51		35,114		52		35,269		53		35,360		53		34,924		53
Consumer:
Automobile	11,876		17		11,555		17		11,155		17		10,969		16		10,791		16
Home equity	9,985		15		9,966		15		9,974		15		10,106		15		10,120		15
Residential mortgage	8,616		13		8,237		12		7,829		12		7,725		12		7,665		12
RV and marine finance	2,371		3		2,178		3		1,935		2		1,846		3		1,840		3
Other consumer	1,064		1		1,009		1		936		1		956		1		964		1
Total consumer	33,912		49		32,945		48		31,829		47		31,602		47		31,380		47
Total loans and leases	$	68,587	100	%	$	68,059	100	%	$	67,098	100	%	$	66,962	100	%	$	66,304	100	%

Our loan portfolio is composed of a managed mix of consumer and commercial credits. At the corporate level, we manage the overall credit exposure and portfolio composition in part via a credit concentration policy. The policy designates specific loan types, collateral types, and loan structures to be formally tracked and assigned maximum exposure limits as a percentage of capital. C&I lending by NAICS categories, specific limits for CRE project types, loans secured by residential real estate, shared national credit exposure, and designated high risk loan definitions represent examples of specifically tracked components of our concentration management process. There are no identified concentrations that exceed the assigned exposure limit. Our concentration management policy is approved by the ROC of the Board and is one of the strategies used to ensure a high quality, well diversified portfolio that is consistent with our overall objective of maintaining an aggregate moderate-to-low risk profile. Changes to existing concentration limits require the approval of the ROC prior to implementation, incorporating specific information relating to the potential impact on the overall portfolio composition and performance metrics.

Commercial Credit

Refer to the “Commercial Credit” section of our 2016 Form 10-K for our commercial credit underwriting and on-going credit management processes.

Consumer Credit

Refer to the “Consumer Credit” section of our 2016 Form 10-K for our consumer credit underwriting and on-going credit management processes.

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The table below provides our total loan and lease portfolio segregated by industry type. The changes in the industry composition from December 31, 2016 are consistent with the portfolio growth.

Table 11 - Loan and Lease Portfolio by Industry Type
(dollar amounts in millions)
	September 30, 2017				June 30, 2017				March 31, 2017				December 31, 2016				September 30, 2016
Commercial loans and leases:
Real estate and rental and leasing	$	7,461	11	%	$	7,588	12	%	$	7,482	12	%	$	7,545	11	%	$	7,513	12	%
Manufacturing	4,874		7		4,916		7		5,048		8		4,937		7		4,931		7
Retail trade (1)	4,643		7		4,805		7		4,902		7		4,758		7		4,588		7
Finance and insurance	2,900		4		3,051		4		2,844		4		2,010		3		2,289		3
Health care and social assistance	2,727		4		2,699		4		2,727		4		2,729		4		2,638		4
Wholesale trade	2,070		3		2,058		3		2,181		3		2,071		3		2,009		3
Accommodation and food services	1,653		2		1,660		2		1,652		2		1,678		3		1,612		2
Other services	1,265		2		1,261		2		1,278		2		1,223		2		1,205		2
Transportation and warehousing	1,255		2		1,284		2		1,382		2		1,366		2		1,357		2
Professional, scientific, and technical services	1,230		2		1,232		2		1,240		2		1,264		2		1,228		2
Construction	913		1		928		1		924		1		875		1		889		1
Mining, quarrying, and oil and gas extraction	619		1		501		1		511		1		668		1		704		1
Arts, entertainment, and recreation	530		1		469		1		506		1		556		1		437		1
Educational services	509		1		570		1		544		1		501		1		495		1
Admin./Support/Waste Mgmt. and Remediation Services	484		1		444		1		427		1		429		1		409		1
Information	468		1		458		1		454		1		473		1		475		1
Utilities	431		1		433		1		463		1		470		1		480		1
Public administration	262		—		274		—		266		—		272		—		273		—
Agriculture, forestry, fishing and hunting	176		—		203		—		170		—		151		—		161		—
Unclassified/Other	122		—		183		—		167		—		1,288		2		1,136		2
Management of companies and enterprises	86		—		97		—		101		—		96		—		95		—
Total commercial loans and leases by industry category	34,675		51		35,114		52		35,269		53		35,360		53		34,924		53
Automobile	11,876		17		11,555		17		11,155		17		10,969		16		10,791		16
Home Equity	9,985		15		9,966		15		9,974		15		10,106		15		10,120		15
Residential mortgage	8,616		13		8,237		12		7,829		12		7,725		12		7,665		12
RV and marine finance	2,371		3		2,178		3		1,935		2		1,846		3		1,840		3
Other consumer loans	1,064		1		1,009		1		936		1		956		1		964		1
Total loans and leases	$	68,587	100	%	$	68,059	100	%	$	67,098	100	%	$	66,962	100	%	$	66,304	100	%

(1) Amounts include $3.0 billion, $3.2 billion, $3.3 billion, $3.2 billion and $3.0 billion of auto dealer services loans at September 30, 2017, June 30, 2017, March 31, 2017, December 31, 2016 and September 30, 2016, respectively.

Credit Quality

(This section should be read in conjunction with Note 3 of the Notes to Unaudited Condensed Consolidated Financial Statements.)

We believe the most meaningful way to assess overall credit quality performance is through an analysis of credit quality performance ratios. This approach forms the basis of most of the discussion in the sections immediately following: NPAs and NALs, TDRs, ACL, and NCOs. In addition, we utilize delinquency rates, risk distribution and migration patterns, and product segmentation in the analysis of our credit quality performance.

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Credit quality performance in the 2017 third quarter reflected continued overall positive results with stable levels of delinquencies and a 7%decline in NPAs from the prior quarter. Total NCOs were $43 million, or 0.25% annualized, of average total loans and leases.  Net charge-offs increased by $7 million from the prior quarter, due to an increase in the net charge-offs of the consumer portfolios. The ACL to total loans and leases ratio declined by 1 basis point to 1.10%.

NPAs, NALs, AND TDRs

(This section should be read in conjunction with Note 3 of the Notes to Unaudited Condensed Consolidated Financial Statements and "Credit Quality" section of our 2016 Form 10-K.)

NPAs and NALs

Of the $187 million of CRE and C&I-related NALs at September 30, 2017, $106 million, or 57%, represented loans that were less than 30-days past due, demonstrating our continued commitment to proactive credit risk management. With the exception of residential mortgage loans guaranteed by government organizations which continue to accrue interest, first-lien loans secured by residential mortgage collateral are placed on nonaccrual status at 150-days past due. Junior-lien home equity loans are placed on nonaccrual status at the earlier of 120-days past due or when the related first-lien loan has been identified as nonaccrual. Automobile, RV and marine and other consumer loans are generally charged-off at 120-days past due. TDR recognition at an earlier past due status than summarized above also may result in NAL designation.

The following table reflects period-end NALs and NPAs detail for each of the last five quarters: 

Table 12 - Nonaccrual Loans and Leases and Nonperforming Assets
(dollar amounts in thousands)
	September 30, 2017			June 30, 2017			March 31, 2017			December 31, 2016			September 30, 2016
Nonaccrual loans and leases (NALs):
Commercial and industrial	$	169,751		$	195,279		$	232,171		$	234,184		$	220,862
Commercial real estate	17,397			16,763			13,889			20,508			21,300
Automobile	4,076			3,825			4,881			5,766			4,777
Home equity	71,353			67,940			69,575			71,798			69,044
Residential mortgage	75,251			80,306			80,686			90,502			88,155
RV and marine finance	309			341			106			245			96
Other consumer	108			2			2			—			—
Total nonaccrual loans and leases	338,245			364,456			401,310			423,003			404,234
Other real estate:
Residential	26,449			26,890			31,786			30,932			34,421
Commercial	15,592			16,926			18,101			19,998			36,915
Total other real estate	42,041			43,816			49,887			50,930			71,336
Other NPAs (1)	6,677			6,906			6,910			6,968			—
Total nonperforming assets	$	386,963		$	415,178		$	458,107		$	480,901		$	475,570
Nonaccrual loans and leases as a % of total loans and leases	0.49		%	0.54		%	0.60		%	0.63		%	0.61		%
NPA ratio (2)	0.56			0.61			0.68			0.72			0.72
(NPA&90+days past due)/(Loans&OREO)	0.74			0.81			0.87			0.91			0.92

(1)Other nonperforming assets includes certain impaired investment securities.

(2) Nonperforming assets divided by the sum of loans and leases, other real estate owned, and other NPAs.

2017 Third Quarter versus 2016 Fourth Quarter.

Total NPAs decreased by $94 million, or 20%, compared with December 31, 2016 primarily as a result of decreases in the C&I and residential portfolios NALs and a 17% decrease in OREO. The C&I decline was a result of significant payoffs and return to accrual of large relationships that were identified as NAL in the fourth quarter of 2016.  The residential mortgage decline was in part due to the efforts by our Home Savers Group actively working with our customers.

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TDR Loans

(This section should be read in conjunction with Note 3 of the Notes to Unaudited Condensed Consolidated Financial Statements and TDR Loans section of our 2016 Form 10-K.)

Over the past five quarters, the accruing component of the total TDR balance has been between 80% and 84%, as borrowers continue to make their monthly payments in accordance with the modified terms.  From a payment standpoint, over 80% of the $500 million of accruing TDRs secured by residential real estate (Residential Mortgage and Home Equity in Table 13) are current on their required payments.  In addition, over 60% of the accruing pool have had no delinquency at all in the past 12 months. There is limited migration from the accruing to non-accruing components, and virtually all of the charge-offs come from the non-accruing TDR balances.

The table below presents our accruing and nonaccruing TDRs at period-end for each of the past five quarters:

Table 13 - Accruing and Nonaccruing Troubled Debt Restructured Loans
(dollar amounts in thousands)
	September 30, 2017		June 30, 2017		March 31, 2017		December 31, 2016		September 30, 2016
Troubled debt restructured loans—accruing:
Commercial and industrial	$	268,373	$	270,372	$	222,303	$	210,119	$	232,740
Commercial real estate	80,272		74,429		81,202		76,844		80,553
Automobile	28,973		28,140		27,968		26,382		27,843
Home equity	264,410		268,731		271,258		269,709		275,601
Residential mortgage	235,191		238,087		239,175		242,901		251,529
RV and marine finance	1,211		950		581		—		—
Other consumer	6,353		4,017		4,128		3,780		4,102
Total troubled debt restructured loans—accruing	884,783		884,726		846,615		829,735		872,368
Troubled debt restructured loans—nonaccruing:
Commercial and industrial	96,248		89,757		88,759		107,087		70,179
Commercial real estate	3,797		3,823		4,357		4,507		5,672
Automobile	4,076		4,291		4,763		4,579		4,437
Home equity	30,753		28,667		29,090		28,128		28,009
Residential mortgage	50,428		55,590		59,773		59,157		62,027
RV and marine finance	309		381		106		—		—
Other consumer	103		109		117		118		142
Total troubled debt restructured loans—nonaccruing	185,714		182,618		186,965		203,576		170,466
Total troubled debt restructured loans	$	1,070,497	$	1,067,344	$	1,033,580	$	1,033,311	$	1,042,834

Accruing TDRs increased by $55 million compared with December 31, 2016, primarily as a result of the addition of C&I loans that meet the well secured definition and have demonstrated a period of satisfactory payment performance.

ACL

(This section should be read in conjunction with Note 3 of the Notes to Unaudited Condensed Consolidated Financial Statements.)

Our total credit reserve is comprised of two different components, both of which in our judgment are appropriate to absorb credit losses inherent in our loan and lease portfolio: the ALLL and the AULC. Combined, these reserves comprise the total ACL. Our ACL Methodology Committee is responsible for developing the methodology, assumptions and estimates used in the calculation, as well as determining the appropriateness of the ACL. The ALLL represents the estimate of losses inherent in the loan portfolio at the reported date. Additions to the ALLL result from recording provision expense for the recognition of loan losses due to new loan originations or funding under existing lines, and  increased risk levels resulting from loan risk-rating downgrades or increasing delinquency migrations.  Reductions reflect charge-offs (net of recoveries), and decreased risk levels resulting from loan risk-rating upgrades, decreasing delinquencies, or the sale / paydown of loans. The AULC is determined by applying the same quantitative reserve determination process to the unfunded portion of the loan exposures adjusted by an applicable funding expectation.

Loans originated for investment are stated at their principal amount outstanding adjusted for partial charge-offs, and net

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deferred loan fees and costs. Acquired loans are those purchased in the FirstMerit acquisition. These loans were recorded at estimated fair value at the acquisition date with no carryover of the related ALLL. The difference between acquired contractual balance and estimated fair value at acquisition date was recorded as a purchase premium or discount.

Our ACL evaluation process includes the on-going assessment of credit quality metrics, and a comparison of certain ACL benchmarks to current performance.

The table below reflects the allocation of our ACL among our various loan categories during each of the past five quarters: 

Table 14 - Allocation of Allowance for Credit Losses (1)
(dollar amounts in thousands)
	September 30, 2017				June 30, 2017				March 31, 2017				December 31, 2016				September 30, 2016
Allowance for Credit Losses
Commercial
Commercial and industrial	$	373,821	40	%	$	367,956	41	%	$	380,504	42	%	$	355,424	42	%	$	333,101	42	%
Commercial real estate	100,301		11		106,620		11		99,804		11		95,667		11		98,694		11
Total commercial	474,122		51		474,576		52		480,308		53		451,091		53		431,795		53
Consumer
Automobile	50,382		17		48,322		17		46,402		17		47,970		16		42,584		16
Home equity	57,897		15		62,941		15		64,900		15		65,474		15		69,866		15
Residential mortgage	29,236		13		33,304		12		35,559		12		33,398		12		36,510		12
RV and marine finance	13,018		3		7,665		3		4,022		2		5,311		3		4,289		3
Other consumer	50,831		1		41,188		1		41,389		1		35,169		1		31,854		1
Total consumer	201,364		49		193,420		48		192,272		47		187,322		47		185,103		47
Total allowance for loan and lease losses	675,486		100	%	667,996		100	%	672,580		100	%	638,413		100	%	616,898		100	%
Allowance for unfunded loan commitments	78,566				85,359				91,838				97,879				88,433
Total allowance for credit losses	$	754,052			$	753,355			$	764,418			$	736,292			$	705,331
Total allowance for loan and leases losses as % of:
Total loans and leases			0.98	%			0.98	%			1.00	%			0.95	%			0.93	%
Nonaccrual loans and leases			200				183				168				151				153
Nonperforming assets			175				161				147				133				130
Total allowance for credit losses as % of:
Total loans and leases			1.10	%			1.11	%			1.14	%			1.10	%			1.06	%
Nonaccrual loans and leases			223				207				190				174				174
Nonperforming assets			195				181				167				153				148

(1) Percentages represent the percentage of each loan and lease category to total loans and leases.

2017 Third Quarter versus 2016 Fourth Quarter

At September 30, 2017, the ALLL was $675 million, compared to $638 million at December 31, 2016. The $37 million, or 6%, increase in the ALLL relates to an increase in Criticized/Classified assets in the C&I portfolio as well as growth in reserve levels for the Other Consumer portfolio related to growth and seasoning of the portfolio.

The ACL to total loans ratio was 1.10% at September 30, 2017 and December 31, 2016. Management believes the ratio is appropriate given the overall moderate-to-low risk profile of our loan portfolio. We continue to focus on early identification of loans with changes in credit metrics and proactive action plans for these loans. We believe that our ACL is appropriate and its coverage level is reflective of the quality of our portfolio and the current operating environment.

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NCOs

A loan in any portfolio may be charged-off if a loss confirming event has occurred or in accordance with the policies described below, whichever is earlier. Loss confirming events include, but are not limited to, bankruptcy (unsecured), continued delinquency, foreclosure, or receipt of an asset valuation indicating a collateral deficiency where that asset is the sole source of repayment. Additionally, discharged, collateral dependent non-reaffirmed debt in Chapter 7 bankruptcy filings will result in a charge-off to estimated collateral value, less anticipated selling costs.

C&I and CRE loans are either charged-off or written down to net realizable value at 90-days past due with the exception of Huntington Technology Finance administrative lease delinquencies. Automobile loans, RV and marine finance and other consumer loans are generally charged-off at 120-days past due. First-lien and junior-lien home equity loans are charged-off to the estimated fair value of the collateral, less anticipated selling costs, at 150-days past due and 120-days past due, respectively. Residential mortgages are charged-off to the estimated fair value of the collateral, less anticipated selling costs, at 150-days past due.

Table 15 - Quarterly Net Charge-off Analysis
	Three Months Ended
	September 30,			June 30,			September 30,
(dollar amounts in thousands)	2017			2017			2016
Net charge-offs (recoveries) by loan and lease type:
Commercial:
Commercial and industrial	$	13,317		$	12,870		$	19,225
Commercial real estate:
Construction	(870		)	83			(271		)
Commercial	(3,184		)	(3,638		)	(2,427		)
Commercial real estate	(4,054		)	(3,555		)	(2,698		)
Total commercial	9,263			9,315			16,527
Consumer:
Automobile	9,619			8,318			7,769
Home equity	1,532			1,218			2,624
Residential mortgage	2,057			1,052			1,728
RV and marine finance	3,390			1,875			106
Other consumer	17,031			14,262			11,311
Total consumer	33,629			26,725			23,538
Total net charge-offs	$	42,892		$	36,040		$	40,065
	Three Months Ended
	September 30,			June 30,			September 30,
	2017			2017			2016
Net charge-offs (recoveries)—annualized percentages:
Commercial:
Commercial and industrial	0.19		%	0.18		%	0.31		%
Commercial real estate:
Construction	(0.30		)	0.03			(0.10		)
Commercial	(0.21		)	(0.24		)	(0.19		)
Commercial real estate	(0.22		)	(0.20		)	(0.17		)
Total commercial	0.11			0.11			0.21
Consumer:
Automobile	0.33			0.29			0.27
Home equity	0.06			0.05			0.11
Residential mortgage	0.10			0.05			0.10
RV and marine finance	0.59			0.37			0.05
Other consumer	6.51			5.81			5.54
Total consumer	0.40			0.33			0.32
Net charge-offs as a % of average loans	0.25		%	0.21		%	0.26		%

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In assessing NCO trends, it is helpful to understand the process of how commercial loans are treated as they deteriorate over time. The ALLL is established consistent with the level of risk associated with the commercial portfolio's original underwriting. As a part of our normal portfolio management process for commercial loans, loans within the portfolio are periodically reviewed and the ALLL is increased or decreased based on the updated risk ratings. For TDRs and individually assessed impaired loans, a specific reserve is established based on the discounted projected cash flows or collateral value of the specific loan. Charge-offs, if necessary, are generally recognized in a period after the specific ALLL is established. Consumer loans are treated in much the same manner as commercial loans, with increasing reserve factors applied based on the risk characteristics of the loan, although specific reserves are not identified for consumer loans, except for TDRs. In summary, if loan quality deteriorates, the typical credit sequence would be periods of reserve building, followed by periods of higher NCOs as the previously established ALLL is utilized. Additionally, an increase in the ALLL either precedes or is in conjunction with increases in NALs. When a loan is classified as NAL, it is evaluated for specific ALLL or charge-off. As a result, an increase in NALs does not necessarily result in an increase in the ALLL or an expectation of higher future NCOs.

2017 Third Quarter versus 2017 Second Quarter

NCOs were an annualized 0.25% of average loans and leases in the current quarter, an increase from 0.21% in the 2017 second quarter, still below our long-term expectation of 0.35% - 0.55%. Commercial - C&I charge-offs were slightly higher for the quarter, but well within our expected performance range. Consumer charge-offs were higher for the quarter, primarily driven by seasonality trends across the consumer portfolio, consistent with our expectations. Given the low level of C&I and CRE NCO’s, we have experienced and continue to expect some volatility on a quarter-to-quarter comparison basis.

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The table below reflects NCO detail for the nine-month periods ended September 30, 2017 and 2016:

Table 16 - Year to Date Net Charge-off Analysis
	Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016
Net charge-offs by loan and lease type:
Commercial:
Commercial and industrial	$	34,283		$	29,441
Commercial real estate:
Construction	(3,924		)	(752		)
Commercial	(5,927		)	(20,095		)
Commercial real estate	(9,851		)	(20,847		)
Total commercial	24,432			8,594
Consumer:
Automobile	30,344			18,859
Home equity	4,412			7,383
Residential mortgage	5,704			4,151
RV and marine finance	7,628			106
Other consumer	45,850			26,279
Total consumer	93,938			56,778
Total net charge-offs	$	118,370		$	65,372
	Nine Months Ended September 30,
	2017			2016
Net charge-offs - annualized percentages:
Commercial:
Commercial and industrial	0.16		%	0.18		%
Commercial real estate:
Construction	(0.44		)	(0.10		)
Commercial	(0.13		)	(0.58		)
Commercial real estate	(0.18		)	(0.50		)
Total commercial	0.09			0.04
Consumer:
Automobile	0.36			0.24
Home equity	0.06			0.11
Residential mortgage	0.09			0.09
RV and marine finance	0.49			0.05
Other consumer	6.13			5.23
Total consumer	0.39			0.29
Net charge-offs as a % of average loans	0.23		%	0.16		%

2017 First Nine Months versus 2016 First Nine Months

NCOs were $118 million, a $53 million increase from the same period in the prior year. The increase primarily relates to portfolio growth as a result of the FirstMerit acquisition as well as one large commercial recovery in the prior year period. Given the low level of C&I and CRE NCO’s, there will continue to be some volatility on a period-to-period comparison basis.

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Market Risk

(This section should be read in conjunction with the “Market Risk” section of our 2016 Form 10-K for our on-going market risk management processes.)

Market risk refers to potential losses arising from changes in interest rates, foreign exchange rates, equity prices and commodity prices, including the correlation among these factors and their volatility. When the value of an instrument is tied to such external factors, the holder faces market risk. We are primarily exposed to interest rate risk as a result of offering a wide array of financial products to our customers and secondarily to price risk from trading securities, securities owned by our broker-dealer subsidiary, foreign exchange positions, equity investments, and investments in securities backed by mortgage loans.

Interest Rate Risk

Table 17 - Net Interest Income at Risk
	Net Interest Income at Risk (%)
Basis point change scenario	-25		+100		+200
Board policy limits	N/A		-2.0	%	-4.0	%
September 30, 2017	-0.5	%	2.5	%	5.0	%
December 31, 2016	-1.0	%	2.7	%	5.6	%

The NII at Risk results included in the table above reflect the analysis used monthly by management. It models gradual -25, +100 and +200 basis point parallel shifts in market interest rates, implied by the forward yield curve over the next twelve months. Due to the current low level of short-term interest rates, the analysis reflects a declining interest rate scenario of 25 basis points, the point at which many assets and liabilities reach zero percent.

Our NII at Risk is within our board of director's policy limits for the +100 and +200 basis point scenarios. There is no policy limit for the -25 basis point scenario. The NII at Risk shows that the balance sheet is asset sensitive at both September 30, 2017, and December 31, 2016.

Table 18 - Economic Value of Equity at Risk
	Economic Value of Equity at Risk (%)
Basis point change scenario	-25		+100		+200
Board policy limits	N/A		-5.0	%	-12.0	%
September 30, 2017	-1.2	%	3.4	%	4.9	%
December 31, 2016	-0.6	%	0.9	%	0.2	%

The EVE results included in the table above reflect the analysis used monthly by management. It models immediate -25, +100 and +200 basis point parallel shifts in market interest rates. Due to the current low level of short-term interest rates, the analysis reflects a declining interest rate scenario of 25 basis points, the point at which deposit costs reach zero percent.

We are within our board of director's policy limits for the +100 and +200 basis point scenarios. There is no policy limit for the -25 basis point scenario. The EVE depicts a moderate level of long-term interest rate risk, which indicates the balance sheet is positioned favorably for rising interest rates. The EVE increase at September 30, 2017 from December 31, 2016 is primarily the result of a change in the average life assumptions for certain loans, deposits and securities.

MSRs

(This section should be read in conjunction with Note 6 of Notes to Unaudited Condensed Consolidated Financial Statements.)

At September 30, 2017, we had a total of $195 million of capitalized MSRs representing the right to service $19.6 billion in mortgage loans. Of this $195 million, $12 million was recorded using the fair value method and $183 million was recorded using the amortization method.

MSR fair values are sensitive to movements in interest rates as expected future net servicing income depends on the projected outstanding principal balances of the underlying loans, which can be reduced by prepayments. Prepayments usually increase when mortgage interest rates decline and decrease when mortgage interest rates rise. We have employed hedging strategies to reduce the risk of MSR fair value changes or impairment. However, volatile changes in interest rates can diminish the effectiveness of these economic hedges. We report changes in the MSR value net of hedge-related trading activity in the mortgage banking income category of noninterest income. Changes in the recorded value of the MSR between reporting dates are recognized as an increase or a decrease in mortgage banking income.

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MSRs recorded using the amortization method generally relate to loans originated with historically low interest rates, resulting in a lower probability of prepayments and, ultimately, impairment. MSR assets are included in servicing rights in the Unaudited Condensed Consolidated Financial Statements.

Price Risk

Price risk represents the risk of loss arising from adverse movements in the prices of financial instruments that are carried at fair value and are subject to fair value accounting. We have price risk from trading securities, securities owned by our broker-dealer subsidiary, foreign exchange positions and equity investments. We have established loss limits on the trading portfolio, on the amount of foreign exchange exposure that can be maintained, and on the amount of marketable equity securities that can be held.

Liquidity Risk

(This section should be read in conjunction with the “Liquidity Risk” section of our 2016 Form 10-K for our on-going liquidity risk management processes.)

Our primary source of liquidity is our core deposit base. Core deposits comprised approximately 95% of total deposits at September 30, 2017. We also have available unused wholesale sources of liquidity, including advances from the FHLB of Cincinnati, issuance through dealers in the capital markets, and access to certificates of deposit issued through brokers. Liquidity is further provided by unencumbered, or unpledged, investment securities that totaled $13.9 billion as of September 30, 2017.

Bank Liquidity and Sources of Funding

Our primary sources of funding for the Bank are retail and commercial core deposits. At September 30, 2017, these core deposits funded 73% of total assets (109% of total loans). Other sources of liquidity include non-core deposits, FHLB advances, wholesale debt instruments, and securitizations. Demand deposit overdrafts that have been reclassified as loan balances were $24 million and $23 million at September 30, 2017 and December 31, 2016, respectively.

The following table reflects deposit composition detail for each of the last five quarters:

Table 19 - Deposit Composition
(dollar amounts in millions)
	September 30,				June 30,				March 31,				December 31,				September 30,
	2017				2017				2017				2016				2016
By Type:
Demand deposits—noninterest-bearing	$	22,225	28	%	$	21,420	28	%	$	21,489	28	%	$	22,836	30	%	$	23,426	30	%
Demand deposits—interest-bearing	18,343		23		17,113		23		18,618		24		15,676		21		15,730		20
Money market deposits	20,553		26		19,423		26		18,664		24		18,407		24		18,604		24
Savings and other domestic deposits	11,441		15		11,758		15		12,043		16		11,975		16		12,418		16
Core certificates of deposit	2,009		3		2,088		3		2,188		3		2,535		3		2,724		4
Total core deposits:	74,571		95		71,802		95		73,002		95		71,429		94		72,902		94
Other domestic deposits of $250,000 or more	418		1		441		1		524		1		394		1		391		1
Brokered deposits and negotiable CDs	3,456		4		3,690		4		3,897		4		3,785		5		3,972		5
Deposits in foreign offices	—		—		—		—		—		—		—		—		140		—
Total deposits	$	78,445	100	%	$	75,933	100	%	$	77,423	100	%	$	75,608	100	%	$	77,405	100	%
Total core deposits:
Commercial	$	35,516	48	%	$	32,201	45	%	$	32,963	45	%	$	31,887	45	%	$	32,936	45	%
Consumer	39,055		52		39,601		55		40,039		55		39,542		55		39,966		55
Total core deposits	$	74,571	100	%	$	71,802	100	%	$	73,002	100	%	$	71,429	100	%	$	72,902	100	%

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The Bank maintains borrowing capacity at the FHLB and the Federal Reserve Bank Discount Window. The Bank does not consider borrowing capacity from the Federal Reserve Bank Discount Window as a primary source of liquidity. Total loans pledged to the Federal Reserve Discount Window and the FHLB are $32.0 billion and $19.7 billion at September 30, 2017 and December 31, 2016, respectively.

To the extent we are unable to obtain sufficient liquidity through core deposits, we may meet our liquidity needs through sources of wholesale funding, asset securitization, or sale. Sources of wholesale funding include other domestic deposits of $250,000 or more, brokered deposits and negotiable CDs, deposits in foreign offices, short-term borrowings, and long-term debt. At September 30, 2017, total wholesale funding was $14.9 billion, a decrease from $16.2 billion at December 31, 2016. The decrease from year-end primarily relates to a decrease in short-term borrowings.

Liquidity Coverage Ratio

On September 3, 2014, the U.S. banking regulators adopted a final LCR for internationally active banking organizations, generally those with $250 billion or more in total assets, and a Modified LCR rule for banking organizations, similar to Huntington, with $50 billion or more in total assets that are not internationally active banking organizations. The LCR is designed to promote the short-term resilience of the liquidity risk profile of banks to which it applies. The Modified LCR requires Huntington to maintain HQLA to meet its net cash outflows over a prospective 30 calendar-day period, which takes into account the potential impact of idiosyncratic and market-wide shocks. The Modified LCR transition period began on January 1, 2016, with Huntington required to maintain HQLA equal to 90 percent of the stated requirement. The ratio increased to 100 percent on January 1, 2017. At September 30, 2017, Huntington was in compliance with the Modified LCR requirement.

Parent Company Liquidity

The parent company’s funding requirements consist primarily of dividends to shareholders, debt service, income taxes, operating expenses, funding of nonbank subsidiaries, repurchases of our stock, and acquisitions. The parent company obtains funding to meet obligations from dividends and interest received from the Bank, interest and dividends received from direct subsidiaries, net taxes collected from subsidiaries included in the federal consolidated tax return, fees for services provided to subsidiaries, and the issuance of debt securities.

At September 30, 2017, the parent company had $1.9 billion in cash and cash equivalents, slightly up fromDecember 31, 2016.

On October 18, 2017, the board of directors declared a quarterly common stock cash dividend of $0.11 per common share. The dividend is payable on January 2, 2018, to shareholders of record on December 18, 2017. Based on the current quarterly dividend of $0.11 per common share, cash demands required for common stock dividends are estimated to be approximately $119 million per quarter. On October 18, 2017, the board of directors declared a quarterly Series A, Series B, Series C, and Series D Preferred Stock dividend payable on January 15, 2018 to shareholders of record on January 1, 2018. Based on the current dividend, cash demands required for Series A, Series B, Series C, and Series D Preferred Stock are estimated to be approximately $8 million, $0.3 million, $1.5 million, and $9 million per quarter, respectively.

During the first nine months of 2017, the Bank returned capital totaling $426 million. Additionally, the Bank paid a preferred dividend of $34 million and common stock dividend of $100 million to the holding company during the first nine months of 2017. To meet any additional liquidity needs, the parent company may issue debt or equity securities from time to time.

Off-Balance Sheet Arrangements

In the normal course of business, we enter into various off-balance sheet arrangements. These arrangements include commitments to extend credit (See Note 14), financial guarantees contained in standby letters-of-credit issued by the Bank (See Note 14), and commitments by the Bank to sell mortgage loans (See Note 14).

Operational Risk

Operational risk is the risk of loss due to human error; inadequate or failed internal systems and controls, including the use of financial or other quantitative methodologies that may not adequately predict future results; violations of, or noncompliance with, laws, rules, regulations, prescribed practices, or ethical standards; and external influences such as market conditions, fraudulent activities, disasters, and security risks. We continuously strive to strengthen our system of internal controls to ensure compliance with laws, rules, and regulations, and to improve the oversight of our operational risk. We actively and continuously monitor cyber-attacks such as attempts related to online deception and loss of sensitive customer data. We evaluate internal systems, processes and controls to mitigate loss from cyber attacks and, to date, have not experienced any material losses.

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Our objective for managing cyber security risk is to avoid or minimize the impacts of external threat events or other efforts to penetrate our systems. We work to achieve this objective by hardening networks and systems against attack, and by diligently managing visibility and monitoring controls within our data and communications environment to recognize events and respond before the attacker has the opportunity to plan and execute on its own goals. To this end we employ a set of defense in-depth strategies, which include efforts to make us less attractive as a target and less vulnerable to threats, while investing in threat analytic capabilities for rapid detection and response. Potential concerns related to cyber security may be escalated to our board-level Technology Committee, as appropriate. As a complement to the overall cyber security risk management, we use a number of internal training methods, both formally through mandatory courses and informally through written communications and other updates. Internal policies and procedures have been implemented to encourage the reporting of potential phishing attacks or other security risks. We also use third-party services to test the effectiveness of our cyber security risk management framework, and any such third parties are required to comply with our policies regarding information security and confidentiality.

To mitigate operational risks, we have a senior management Operational Risk Committee and a senior management Legal, Regulatory, and Compliance Committee. The responsibilities of these committees, among other duties, include establishing and maintaining management information systems to monitor material risks and to identify potential concerns, risks, or trends that may have a significant impact and ensuring that recommendations are developed to address the identified issues. In addition, we have a senior management Model Risk Oversight Committee that is responsible for policies and procedures describing how model risk is evaluated and managed and the application of the governance process to implement these practices throughout the enterprise. These committees report any significant findings and recommendations to the Risk Management Committee. Potential concerns may be escalated to our ROC, as appropriate.

The FirstMerit integration was inherently large and complex. Our objective for managing execution risk was to minimize impacts to daily operations. We established an Integration Management Office led by senior management. Responsibilities included central management, reporting, and escalation of key integration deliverables. In addition, a board level Integration Governance Committee was established to assist in the oversight of the integration of people, systems, and processes of FirstMerit with Huntington. While the systems' conversion is now largely completed, continued oversight occurred until all converted systems were fully decommissioned.

The goal of this framework is to implement effective operational risk techniques and strategies, minimize operational fraud, and legal losses; minimize the impact of inadequately designed models and enhance our overall performance.

Compliance Risk

Financial institutions are subject to many laws, rules, and regulations at both the federal and state levels. These broad-based laws, rules, and regulations include, but are not limited to, expectations relating to anti-money laundering, lending limits, client privacy, fair lending, prohibitions against unfair, deceptive or abusive acts or practices, protections for military members as they enter active duty, and community reinvestment. Additionally, the volume and complexity of recent regulatory changes have increased our overall compliance risk. As such, we utilize various resources to help ensure expectations are met, including a team of compliance experts dedicated to ensuring our conformance with all applicable laws, rules, and regulations. Our colleagues receive training for several broad-based laws and regulations including, but not limited to, anti-money laundering and customer privacy. Additionally, colleagues engaged in lending activities receive training for laws and regulations related to flood disaster protection, equal credit opportunity, fair lending, and/or other courses related to the extension of credit. We set a high standard of expectation for adherence to compliance management and seek to continuously enhance our performance.

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Capital

Both regulatory capital and shareholders’ equity are managed at the Bank and on a consolidated basis. We have an active program for managing capital and maintain a comprehensive process for assessing the Company’s overall capital adequacy. We believe our current levels of both regulatory capital and shareholders’ equity are adequate.

The following table presents certain regulatory capital data at both the consolidated and Bank levels for each of the periods presented: 

Table 20 - Regulatory Capital Data
		Basel III
(dollar amounts in millions)		September 30, 2017			June 30, 2017			December 31, 2016
Total risk-weighted assets	Consolidated	$	78,631		$	78,366		$	78,263
	Bank	78,848			78,489			78,242
Common equity tier I risk-based capital	Consolidated	7,817			7,740			7,486
	Bank	8,491			8,367			8,153
Tier 1 risk-based capital	Consolidated	8,886			8,809			8,547
	Bank	9,362			9,238			9,086
Tier 2 risk-based capital	Consolidated	1,638			1,640			1,668
	Bank	1,706			1,706			1,732
Total risk-based capital	Consolidated	10,524			10,449			10,215
	Bank	11,068			10,944			10,818
Tier 1 leverage ratio	Consolidated	8.96		%	8.98		%	8.70		%
	Bank	9.44			9.43			9.29
Common equity tier I risk-based capital ratio	Consolidated	9.94			9.88			9.56
	Bank	10.77			10.66			10.42
Tier 1 risk-based capital ratio	Consolidated	11.30			11.24			10.92
	Bank	11.87			11.77			11.61
Total risk-based capital ratio	Consolidated	13.39			13.33			13.05
	Bank	14.04			13.94			13.83

At September 30, 2017, we maintained Basel III transitional capital ratios in excess of the well-capitalized standards established by the FRB.

Common Equity Tier 1 (CET1) risk-based capital ratio was 9.94% at September 30, 2017, up from 9.56% at December 31, 2016. The regulatory Tier 1 risk-based capital ratio was 11.30% compared to 10.92% at December 31, 2016. All capital ratios were impacted by the repurchase of $123 million of common stock at an average cost of $12.75 per share during the 2017 third quarter.

Shareholders’ Equity

We generate shareholders’ equity primarily through the retention of earnings, net of dividends and share repurchases. Other potential sources of shareholders’ equity include issuances of common and preferred stock. Our objective is to maintain capital at an amount commensurate with our risk profile and risk tolerance objectives, to meet both regulatory and market expectations, and to provide the flexibility needed for future growth and business opportunities.

Shareholders’ equity totaled $10.7 billion at September 30, 2017, an increase of $0.4 billion when compared with December 31, 2016.

On June 28, 2017, Huntington was notified by the Federal Reserve that it had no objection to Huntington's proposed capital actions included in Huntington's capital plan submitted in the 2017 Comprehensive Capital Analysis and Review (CCAR). These actions included a 38% increase in the quarterly dividend per common share to $0.11, starting in the fourth quarter of 2017, the repurchase of up to $308 million of common stock over the next four quarters (July 1, 2017 through June 30, 2018), subject to authorization by the Board of Directors, and maintaining dividends on the outstanding classes of preferred stock and trust preferred securities.

On July 19, 2017, the Board authorized the repurchase of up to $308 million of common shares over the four quarters through the 2018 second quarter. During the 2017 third quarter, Huntington purchased $123 million of common stock at an

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average cost of $12.75 per share. Purchases of common stock under the authorization may include open market purchases, privately negotiated transactions, and accelerated repurchase programs.

Dividends

We consider disciplined capital management as a key objective, with dividends representing one component. Our strong capital ratios and expectations for continued earnings growth positions us to continue to actively explore additional capital management opportunities.

Fair Value

At the end of each quarter, we assess the valuation hierarchy for each asset or liability measured. As necessary, assets or liabilities may be transferred within hierarchy levels due to changes in availability of observable market inputs at the measurement date. The fair values measured at each level of the fair value hierarchy, additional discussion regarding fair value measurements, and a brief description of how fair value is determined for categories that have unobservable inputs, can be found in Note 11 of the Notes to Unaudited Condensed Consolidated Financial Statements.

BUSINESS SEGMENT DISCUSSION

Overview

Our business segments are based on our internally-aligned segment leadership structure, which is how we monitor results and assess performance. We have four major business segments: Consumer and Business Banking, Commercial Banking, Commercial Real Estate and Vehicle Finance(CREVF), and Regional Banking and The Huntington Private Client Group(RBHPCG). A Treasury / Other function includes technology and operations, other unallocated assets, liabilities, revenue, and expense.

Business segment results are determined based upon our management accounting practices, which assigns balance sheet and income statement items to each of the business segments. The process is designed around our organizational and management structure and, accordingly, the results derived are not necessarily comparable with similar information published by other financial institutions.

We announced a change within our executive leadership team, which became effective during the 2017 second quarter. As a result, the previously reported Home Lending segment is now included as an operating unit within the Consumer and Business Banking segment. Additionally, the Insurance operating unit previously included in Commercial Banking was realigned to RBHPCG during second quarter. Prior period results have been reclassified to conform to the current period presentation.

Revenue Sharing

Revenue is recorded in the business segment responsible for the related product or service. Fee sharing is recorded to allocate portions of such revenue to other business segments involved in selling to, or providing service to customers. Results of operations for the business segments reflect these fee sharing allocations.

Expense Allocation

The management accounting process that develops the business segment reporting utilizes various estimates and allocation methodologies to measure the performance of the business segments. Expenses are allocated to business segments using a two-phase approach. The first phase consists of measuring and assigning unit costs (activity-based costs) to activities related to product origination and servicing. These activity-based costs are then extended, based on volumes, with the resulting amount allocated to business segments that own the related products. The second phase consists of the allocation of overhead costs to all four business segments from Treasury / Other. We utilize a full-allocation methodology, where all Treasury / Other expenses, except reported Significant Items, and a small amount of other residual unallocated expenses, are allocated to the four business segments.

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Funds Transfer Pricing (FTP)

We use an active and centralized FTP methodology to attribute appropriate income to the business segments. The intent of the FTP methodology is to transfer interest rate risk from the business segments by providing matched duration funding of assets and liabilities. The result is to centralize the financial impact, management, and reporting of interest rate risk in the Treasury / Other function where it can be centrally monitored and managed. The Treasury / Other function charges (credits) an internal cost of funds for assets held in (or pays for funding provided by) each business segment. The FTP rate is based on prevailing market interest rates for comparable duration assets (or liabilities).

Net Income by Business Segment

Net income by business segment for the nine-month periods ending September 30, 2017 and September 30, 2016 is presented in the following table:

Table 21 - Net Income (Loss) by Business Segment
	Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016
Consumer and Business Banking	$	314,366		$	234,356
Commercial Banking	239,685			133,470
CREVF	162,676			129,802
RBHPCG	66,962			46,529
Treasury / Other	(29,286		)	(71,299		)
Net income	$	754,403		$	472,858

Treasury / Other

The Treasury / Other function includes revenue and expense related to assets, liabilities, and equity not directly assigned or allocated to one of the four business segments. Other assets include investment securities and bank owned life insurance. The financial impact associated with our FTP methodology, as described above, is also included.

Net interest income includes the impact of administering our investment securities portfolios and the net impact of derivatives used to hedge interest rate sensitivity. Noninterest income includes miscellaneous fee income not allocated to other business segments, such as bank owned life insurance income and securities and trading asset gains or losses. Noninterest expense includes FirstMerit acquisition-related expenses in 2017 first nine-month period, certain corporate administrative, and other miscellaneous expenses not allocated to other business segments. The provision for income taxes for the business segments is calculated at a statutory 35% tax rate, though our overall effective tax rate is lower. As a result, Treasury / Other reflects a credit for income taxes representing the difference between the lower actual effective tax rate and the statutory tax rate used to allocate income taxes to the business segments.

Consumer and Business Banking
Table 22 - Key Performance Indicators for Consumer and Business Banking
	Nine Months Ended September 30,						Change
(dollar amounts in thousands unless otherwise noted)	2017			2016			Amount			Percent
Net interest income	$	1,255,617		$	911,706		$	343,911		38	%
Provision for credit losses	74,270			43,474			30,796			71
Noninterest income	544,445			459,732			84,713			18
Noninterest expense	1,242,152			967,417			274,735			28
Provision for income taxes	169,274			126,191			43,083			34
Net income	$	314,366		$	234,356		$	80,010		34	%
Number of employees (average full-time equivalent)	8,696			6,997			1,699			24	%
Total average assets (in millions)	$	25,461		$	19,921		$	5,540		28
Total average loans/leases (in millions)	20,577			16,967			3,610			21
Total average deposits (in millions)	45,478			33,759			11,719			35
Net interest margin	3.79		%	3.69		%	0.10		%	3
NCOs	$	75,064		$	49,873		$	25,191		51
NCOs as a % of average loans and leases	0.48		%	0.39		%	0.09		%	23

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2017 First Nine Months versus 2016 First Nine Months

Consumer and Business Banking, including Home Lending, reported net income of $314 million in the first nine-month period of 2017, an increase of $80 million, or 34%, compared to the year-ago period. Results were predominantly impacted by the FirstMerit acquisition. Segment net interest income increased $344 million, or 38%, primarily due to an increase in total average loans and deposits. The provision for credit losses increased $31 million, or 71%, driven by increased NCOs as well as an increase in the allowance. Noninterest income increased $85 million, or 18%, due to an increase in card and payment processing income and service charges on deposit accounts, which were driven by higher debit card-related transaction volumes and an increase in the number of households. In addition, SBA loan sales gains contributed to improved noninterest income. Noninterest expense increased $275 million, or 28%, due to an increase in personnel and occupancy expense related to the addition of FirstMerit branches and colleagues. Higher processing costs related to transaction volumes, along with allocated expenses, also contributed to the increase in noninterest expense.

Home Lending, an operating unit of Consumer and Business Banking, reflects the result of the origination and servicing of mortgage loans less referral fees and net interest income for mortgage banking products distributed by the retail branch network and other business segments. Home Lending reported net income of $6 million in the first nine-month period of 2017, a decrease of $11 million, or 64%, compared to the year-ago period. While total revenues increased $9 million, or 8%, largely due to higher residential loan balances, this increase was offset by an increase in noninterest expenses of $22 million, or 27%, as a result of higher personnel costs related to the FirstMerit acquisition and higher origination volume. Income from lower origination spreads offset higher origination volume.

Commercial Banking
Table 23 - Key Performance Indicators for Commercial Banking
	Nine Months Ended September 30,						Change
(dollar amounts in thousands unless otherwise noted)	2017			2016			Amount			Percent
Net interest income	$	514,900		$	355,263		$	159,637		45	%
Provision for credit losses	21,378			53,212			(31,834		)	(60	)
Noninterest income	176,609			150,228			26,381			18
Noninterest expense	301,385			246,941			54,444			22
Provision for income taxes	129,061			71,868			57,193			80
Net income	$	239,685		$	133,470		$	106,215		80	%
Number of employees (average full-time equivalent)	1,078			894			184			21	%
Total average assets (in millions)	$	24,026		$	19,012		$	5,014		26
Total average loans/leases (in millions)	19,051			14,951			4,100			27
Total average deposits (in millions)	19,206			14,976			4,230			28
Net interest margin	3.33		%	2.95		%	0.38		%	13
NCOs	$	13,420		$	19,951		$	(6,531	)	(33	)
NCOs as a % of average loans and leases	0.09		%	0.18		%	(0.09		)%	(50	)

2017 First Nine Months versus 2016 First Nine Months

Commercial Banking reported net income of $240 million in the first nine-month period of 2017, an increase of $106 million, or 80%, compared to the year-ago period. Results were predominantly impacted by the FirstMerit acquisition. Segment net interest income increased $160 million, or 45%, primarily due to an increase in both average loans and deposits combined with a 38 basis point increase in net interest margin. The provision for credit losses decreased $32 million, or 60%, driven by an improvement in energy related credits and a reduction in NCOs. Noninterest income increased $26 million, or 18%, largely driven by an increase in loan commitment and other fees, capital markets related revenues, and deposit service charges and other treasury management related income partially offset by a reduction in operating lease income. Noninterest expense increased $54 million, or 22%, primarily due to an increase in personnel expense, allocated expenses, and amortization of intangibles, partially offset by a decrease in operating lease expense.  

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Commercial Real Estate and Vehicle Finance
Table 24 - Commercial Real Estate and Vehicle Finance
	Nine Months Ended September 30,						Change
(dollar amounts in thousands unless otherwise noted)	2017			2016			Amount			Percent
Net interest income	$	419,556		$	317,704		$	101,852		32	%
Provision for credit losses	40,047			18,706			21,341			114
Noninterest income	34,750			25,951			8,799			34
Noninterest expense	163,989			125,254			38,735			31
Provision for income taxes	87,594			69,893			17,701			25
Net income	$	162,676		$	129,802		$	32,874		25	%
Number of employees (average full-time equivalent)	406			330			76			23	%
Total average assets (in millions)	$	24,121		$	19,520		$	4,601		24
Total average loans/leases (in millions)	23,025			18,433			4,592			25
Total average deposits (in millions)	1,878			1,669			209			13
Net interest margin	2.42		%	2.25		%	0.17		%	8
NCOs (Recoveries)	$	28,007		$	(2,146	)	$	30,153		(1,405	)
NCOs as a % of average loans and leases	0.16		%	(0.02		)%	0.18		%	(900	)

2017 First Nine Months versus 2016 First Nine Months

CREVF reported net income of $163 million in the first nine-month period of 2017, an increase of $33 million, or 25%, compared to the year-ago period. Results were positively impacted by the FirstMerit acquisition, offset in part by a higher provision for credit losses reflecting significant commercial real estate recoveries benefiting the year ago period. Segment net interest income increased $102 million or 32%, due to both higher loan balances and a 17 basis point increase in the net interest margin primarily reflecting the purchase accounting impact of the acquired loan portfolios. Noninterest income increased $9 million, or 34%, primarily due to an increase in gains on various equity investments associated with mezzanine lending related activities and an increase in net servicing income on securitized automobile loans. Noninterest expense increased $39 million, or 31%, primarily due to an increase in personnel costs and other allocated costs attributed to higher production and portfolio balance levels.

Regional Banking and The Huntington Private Client Group
Table 25 - Key Performance Indicators for Regional Banking and The Huntington Private Client Group
	Nine Months Ended September 30,						Change
(dollar amounts in thousands unless otherwise noted)	2017			2016			Amount			Percent
Net interest income	$	145,089		$	112,473		$	32,616		29	%
Provision for credit losses	510			490			20			4
Noninterest income	140,610			126,245			14,365			11
Noninterest expense	182,171			166,645			15,526			9
Provision for income taxes	36,056			25,054			11,002			44
Net income	$	66,962		$	46,529		$	20,433		44	%
Number of employees (average full-time equivalent)	1,027			953			74			8	%
Total average assets (in millions)	$	5,473		$	4,424		$	1,049		24
Total average loans/leases (in millions)	4,779			3,997			782			20
Total average deposits (in millions)	5,893			5,002			891			18
Net interest margin	3.38		%	3.01		%	0.37		%	12
NCOs (Recoveries)	$	1,879		$	(2,392	)	$	4,271		(179	)
NCOs as a % of average loans and leases	0.05		%	(0.08		)%	0.13		%	(163	)
Total assets under management (in billions)—eop	$	18.0		$	17.3		$	0.7		4
Total trust assets (in billions)—eop	106.3			98.8			7.5			8

eop - End of Period.

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2017 First Nine Months versus 2016 First Nine Months

RBHPCG reported net income of $67 million in the first nine-month period of 2017, an increase of $20 million, or 44%, compared to the year-ago period. Results were predominantly impacted by the FirstMerit acquisition. Net interest income increased $33 million, or 29%, due to an increase in average total deposits and loans combined with a 37 basis point increase in net interest margin. The increase in average total loans was due to growth in commercial and portfolio mortgage loans, while the increase in average total deposits was due to growth in interest checking balances. The provision for credit losses was essentially unchanged. Noninterest income increased $14 million, or 11%, primarily reflecting increased trust and investment management revenue as a result of an increase in trust assets and assets under management, largely from the FirstMerit acquisition. Noninterest expense increased $16 million, or 9%, as a result of increased personnel expenses and amortization of intangibles resulting from the FirstMerit acquisition.

ADDITIONAL DISCLOSURES

Forward-Looking Statements

This report, including MD&A, contains certain forward-looking statements, including, but not limited to, certain plans, expectations, goals, projections, and statements, which are not historical facts and are subject to numerous assumptions, risks, and uncertainties. Statements that do not describe historical or current facts, including statements about beliefs and expectations, are forward-looking statements. Forward-looking statements may be identified by words such as expect, anticipate, believe, intend, estimate, plan, target, goal, or similar expressions, or future or conditional verbs such as will, may, might, should, would, could, or similar variations. The forward-looking statements are intended to be subject to the safe harbor provided by Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, and the Private Securities Litigation Reform Act of 1995.

While there is no assurance that any list of risks and uncertainties or risk factors is complete, below are certain factors which could cause actual results to differ materially from those contained or implied in the forward-looking statements: changes in general economic, political, or industry conditions; uncertainty in U.S. fiscal and monetary policy, including the interest rate policies of the Federal Reserve Board; volatility and disruptions in global capital and credit markets; movements in interest rates; competitive pressures on product pricing and services; success, impact, and timing of our business strategies, including market acceptance of any new products or services implementing our “Fair Play” banking philosophy; the nature, extent, timing, and results of governmental actions, examinations, reviews, reforms, regulations, and interpretations, including those related to the Dodd-Frank Wall Street Reform and Consumer Protection Act and the Basel III regulatory capital reforms, as well as those involving the OCC, Federal Reserve, FDIC, and CFPB; the possibility that the anticipated benefits of the merger with FirstMerit Corporation are not realized completely or when expected, including as a result of the impact of, or problems arising from, the strength of the economy and competitive factors in the areas where we do business; and other factors that may affect our future results. Additional factors that could cause results to differ materially from those described above can be found in our Annual Report on Form 10-K for the year ended December 31, 2016, and Quarterly Reports on Form 10-Q for the quarters ended March 31, 2017 and June 30, 2017, which are on file with the Securities and Exchange Commission (the “SEC”) and available in the “Investor Relations” section of our website, http://www.huntington.com, under the heading “Publications and Filings” and in other documents we file with the SEC.

All forward-looking statements speak only as of the date they are made and are based on information available at that time. We do not assume any obligation to update forward-looking statements to reflect circumstances or events that occur after the date the forward-looking statements were made or to reflect the occurrence of unanticipated events except as required by federal securities laws. As forward-looking statements involve significant risks and uncertainties, caution should be exercised against placing undue reliance on such statements.

Non-GAAP Financial Measures

This document contains GAAP financial measures and non-GAAP financial measures where management believes it to be helpful in understanding Huntington’s results of operations or financial position. Where non-GAAP financial measures are used, the comparable GAAP financial measure, as well as the reconciliation to the comparable GAAP financial measure, can be found herein where applicable.

Significant Items

From time-to-time, revenue, expenses, or taxes are impacted by items judged by us to be outside of ordinary banking activities and/or by items that, while they may be associated with ordinary banking activities, are so unusually large that their outsized impact is believed by us at that time to be infrequent or short-term in nature. We refer to such items as Significant Items. Most often, these Significant Items result from factors originating outside the Company; e.g., regulatory actions / assessments, windfall gains, changes in accounting principles, one-time tax assessments / refunds, litigation actions, etc. In

37

other cases, they may result from our decisions associated with significant corporate actions outside of the ordinary course of business; e.g., merger / restructuring charges, recapitalization actions, goodwill impairment, etc.

Even though certain revenue and expense items are naturally subject to more volatility than others due to changes in market and economic environment conditions, as a general rule volatility alone does not define a Significant Item. For example, changes in the provision for credit losses, gains / losses from investment activities, asset valuation writedowns, etc., reflect ordinary banking activities and are, therefore, typically excluded from consideration as a Significant Item.

We believe the disclosure of Significant Items provides a better understanding of our performance and trends to ascertain which of such items, if any, to include or exclude from an analysis of our performance; i.e., within the context of determining how that performance differed from expectations, as well as how, if at all, to adjust estimates of future performance accordingly. To this end, we adopted a practice of listing Significant Items in our external disclosure documents; e.g., earnings press releases, investor presentations, Forms 10-Q and 10-K.

Significant Items for any particular period are not intended to be a complete list of items that may materially impact current or future period performance.

Fully-Taxable Equivalent Basis

Interest income, yields, and ratios on a FTE basis are considered non-GAAP financial measures.  Management believes net interest income on a FTE basis provides an insightful picture of the interest margin for comparison purposes.  The FTE basis also allows management to assess the comparability of revenue arising from both taxable and tax-exempt sources.  The FTE basis assumes a federal statutory tax rate of 35 percent. We encourage readers to consider the consolidated financial statements and other financial information contained in this Form 10-Q in their entirety, and not to rely on any single financial measure.

Non-Regulatory Capital Ratios

In addition to capital ratios defined by banking regulators, the Company considers various other measures when evaluating capital utilization and adequacy, including:

• Tangible common equity to tangible assets, and

• Tangible common equity to risk-weighted assets using Basel III definitions.

These non-regulatory capital ratios are viewed by management as useful additional methods of reflecting the level of capital available to withstand unexpected market conditions. Additionally, presentation of these ratios allows readers to compare the Company’s capitalization to other financial services companies. These ratios differ from capital ratios defined by banking regulators principally in that the numerator excludes preferred securities, the nature and extent of which varies among different financial services companies. These ratios are not defined in GAAP or federal banking regulations. As a result, these non-regulatory capital ratios disclosed by the Company are considered non-GAAP financial measures.

Because there are no standardized definitions for these non-regulatory capital ratios, the Company’s calculation methods may differ from those used by other financial services companies. Also, there may be limits in the usefulness of these measures to investors. As a result, the Company encourages readers to consider the consolidated financial statements and other financial information contained in this Form 10-Q in their entirety, and not to rely on any single financial measure.

Risk Factors

Information on risk is discussed in the Risk Factors section included in Item 1A of our 2016 Form 10-K. Additional information regarding risk factors can also be found in the Risk Management and Capital discussion of this report.

Critical Accounting Policies and Use of Significant Estimates

Our financial statements are prepared in accordance with GAAP. The preparation of financial statements in conformity with GAAP requires us to establish critical accounting policies and make accounting estimates, assumptions, and judgments that affect amounts recorded and reported in our financial statements. Note 1 of Notes to Consolidated Financial Statements included in our December 31, 2016 Form 10-K, as supplemented by this report, lists significant accounting policies we use in the development and presentation of our financial statements. This MD&A, the significant accounting policies, and other financial statement disclosures identify and address key variables and other qualitative and quantitative factors necessary for an understanding and evaluation of our company, financial position, results of operations, and cash flows.

An accounting estimate requires assumptions about uncertain matters that could have a material effect on the financial statements if a different amount within a range of estimates were used or if estimates changed from period to period. Estimates are made under facts and circumstances at a point in time, and changes in those facts and circumstances could produce results that significantly differ from when those estimates were made.

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Our most significant accounting estimates relate to our ACL, valuation of financial instruments, contingent liabilities, income taxes, and deferred tax assets. These significant accounting estimates and their related application are discussed in our December 31, 2016 Form 10-K.

Recent Accounting Pronouncements and Developments

Note 2 of the Notes to Unaudited Condensed Consolidated Financial Statements discusses new accounting pronouncements adopted during 2017 and the expected impact of accounting pronouncements recently issued but not yet required to be adopted. To the extent the adoption of new accounting standards materially affect financial condition, results of operations, or liquidity, the impacts are discussed in the applicable section of this MD&A and the Notes to Unaudited Condensed Consolidated Financial Statements.

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Item 1: Financial Statements

Huntington Bancshares Incorporated

Condensed Consolidated Balance Sheets

(Unaudited)

(dollar amounts in thousands, except number of shares)	September 30,			December 31,
	2017			2016
Assets
Cash and due from banks	$	1,193,738		$	1,384,770
Interest-bearing deposits in banks	50,090			58,267
Trading account securities	88,488			133,295
Loans held for sale (includes $584,829 and $438,224 respectively, measured at fair value)(1)	651,734			512,951
Available-for-sale and other securities	15,453,061			15,562,837
Held-to-maturity securities	8,688,399			7,806,939
Loans and leases (includes $99,191 and $82,319 respectively, measured at fair value)(1)	68,587,296			66,961,996
Allowance for loan and lease losses	(675,486		)	(638,413		)
Net loans and leases	67,911,810			66,323,583
Bank owned life insurance	2,459,807			2,432,086
Premises and equipment	853,290			815,508
Goodwill	1,992,849			1,992,849
Other intangible assets	359,844			402,458
Servicing rights	229,746			225,578
Accrued income and other assets	2,055,270			2,062,976
Total assets	$	101,988,126		$	99,714,097
Liabilities and shareholders’ equity
Liabilities
Deposits	$	78,445,113		$	75,607,717
Short-term borrowings	1,829,549			3,692,654
Long-term debt	9,200,707			8,309,159
Accrued expenses and other liabilities	1,813,908			1,796,421
Total liabilities	91,289,277			89,405,951
Commitments and contingencies (Note 14)
Shareholders’ equity
Preferred stock	1,071,286			1,071,227
Common stock	10,844			10,886
Capital surplus	9,820,600			9,881,277
Less treasury shares, at cost	(35,133		)	(27,384		)
Accumulated other comprehensive loss	(369,963		)	(401,016		)
Retained earnings (deficit)	201,215			(226,844		)
Total shareholders’ equity	10,698,849			10,308,146
Total liabilities and shareholders’ equity	$	101,988,126		$	99,714,097
Common shares authorized (par value of $0.01)	1,500,000,000			1,500,000,000
Common shares issued	1,084,366,589			1,088,641,251
Common shares outstanding	1,080,946,315			1,085,688,538
Treasury shares outstanding	3,420,274			2,952,713
Preferred stock, authorized shares	6,617,808			6,617,808
Preferred shares issued	2,702,571			2,702,571
Preferred shares outstanding	1,098,006			1,098,006

(1) Amounts represent loans for which Huntington has elected the fair value option. See Note 11.

See Notes to Unaudited Condensed Consolidated Financial Statements

40

Huntington Bancshares Incorporated
Condensed Consolidated Statements of Income
(Unaudited)
(dollar amounts in thousands, except per share amounts)	Three Months Ended September 30,					Nine Months Ended September 30,
	2017			2016		2017			2016
Interest and fee income:
Loans and leases	$	724,284		$	583,653	$	2,100,056		$	1,516,849
Available-for-sale and other securities
Taxable	74,409			57,572		228,986			138,178
Tax-exempt	18,579			13,687		55,961			40,499
Held-to-maturity securities—taxable	48,743			33,098		138,214			105,307
Other	6,972			6,336		16,554			16,422
Total interest income	872,987			694,346		2,539,771			1,817,255
Interest expense:
Deposits	49,611			26,233		126,688			71,575
Short-term borrowings	5,713			959		16,782			2,770
Federal Home Loan Bank advances	65			66		197			207
Subordinated notes and other long-term debt	59,165			41,698		163,184			108,366
Total interest expense	114,554			68,956		306,851			182,918
Net interest income	758,433			625,390		2,232,920			1,634,337
Provision for credit losses	43,590			63,805		136,206			115,896
Net interest income after provision for credit losses	714,843			561,585		2,096,714			1,518,441
Service charges on deposit accounts	90,681			86,847		261,683			232,722
Cards and payment processing income	53,647			44,320		153,301			119,951
Mortgage banking income	33,615			40,603		97,575			90,737
Trust and investment management services	33,531			28,923		99,633			74,258
Insurance income	13,992			15,865		45,099			48,037
Brokerage income	14,458			14,719		46,510			44,819
Capital markets fees	21,719			14,750		52,755			40,797
Bank owned life insurance income	16,453			14,452		49,317			40,500
Gain on sale of loans	13,877			7,506		38,701			22,166
Net gains on sales of securities	71			1,031		3,781			1,763
Impairment losses on available-for-sale securities	(104		)	—		(3,687		)	(76		)
Other noninterest income	38,157			33,399		123,110			99,720
Total noninterest income	330,097			302,415		967,778			815,394
Personnel costs	377,088			405,024		1,151,085			989,369
Outside data processing and other services	79,586			91,133		241,957			216,047
Equipment	45,458			40,792		135,082			105,173
Net occupancy	55,124			41,460		175,437			103,640
Professional services	15,227			47,075		51,712			82,101
Marketing	16,970			14,438		49,736			41,479
Deposit and other insurance expense	18,514			14,940		59,031			38,335
Amortization of intangibles	14,017			9,046		42,614			16,357
Other noninterest expense	58,444			48,339		175,560			134,487
Total noninterest expense	680,428			712,247		2,082,214			1,726,988
Income before income taxes	364,512			151,753		982,278			606,847
Provision for income taxes	89,944			24,749		227,875			133,989
Net income	274,568			127,004		754,403			472,858
Dividends on preferred shares	18,903			18,537		56,670			46,409
Net income applicable to common shares	$	255,665		$	108,467	$	697,733		$	426,449

41

	Three Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands, except per share amounts)	2017			2016		2017			2016
Average common shares—basic	1,086,038			938,578		1,087,115			844,167
Average common shares—diluted	1,106,491			952,081		1,107,878			856,934
Per common share:
Net income—basic	$	0.24		$	0.12	$	0.64		$	0.51
Net income—diluted	0.23			0.11		0.63			0.50
Cash dividends declared	0.08			0.07		0.24			0.21
OTTI losses for the periods presented:
Total OTTI losses	$	(104	)	$	—	$	(3,693	)	$	(3,809	)
Noncredit-related portion of loss recognized in OCI	—			—		6			3,733
Impairment losses recognized in earnings on available-for-sale securities	$	(104	)	$	—	$	(3,687	)	$	(76	)
See Notes to Unaudited Condensed Consolidated Financial Statements

42

Huntington Bancshares Incorporated

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017		2016
Net income	$	274,568		$	127,004		$	754,403	$	472,858
Other comprehensive income, net of tax:
Unrealized gains (losses) on available-for-sale and other securities:
Non-credit-related impairment recoveries (losses) on debt securities not expected to be sold	265			1,294			2,391		(388		)
Unrealized net gains (losses) on available-for-sale and other securities arising during the period, net of reclassification for net realized gains and losses	(21,968		)	(35,036		)	25,081		47,118
Total unrealized gains (losses) on available-for-sale and other securities	(21,703		)	(33,742		)	27,472		46,730
Unrealized gains (losses) on cash flow hedging derivatives, net of reclassifications to income	1,318			(5,232		)	1,563		4,731
Change in accumulated unrealized losses for pension and other post-retirement obligations	779			841			2,018		2,522
Other comprehensive income (loss), net of tax	(19,606		)	(38,133		)	31,053		53,983
Comprehensive income	$	254,962		$	88,871		$	785,456	$	526,841

See Notes to Unaudited Condensed Consolidated Financial Statements

43

Huntington Bancshares Incorporated

Condensed Consolidated Statements of Changes in Shareholders’ Equity

(Unaudited)

																Accumulated Other Comprehensive Gain (Loss)			Retained Earnings (Deficit)
(dollar amounts in thousands, except per share amounts)	Preferred Stock		Common Stock					Capital Surplus			Treasury Stock
	Amount		Shares		Amount						Shares		Amount									Total
Nine Months Ended September 30, 2016
Balance, beginning of period	$	386,291	796,970		$	7,970		$	7,038,502		(2,041	)	$	(17,932	)	$	(226,158	)	$	(594,067	)	$	6,594,606
Net income																			472,858			472,858
Other comprehensive income (loss)																53,983						53,983
FirstMerit Acquisition:
Issuance of common stock			285,425		2,854			2,764,044														2,766,898
Issuance of Series C preferred stock	100,000							4,320														104,320
Net proceeds from issuance of Series D preferred stock	584,936																					584,936
Cash dividends declared:
Common ($0.21 per share)																			(187,710		)	(187,710		)
Preferred Series A ($63.75 per share)																			(23,110		)	(23,110		)
Preferred Series B ($25.08 per share)																			(890		)	(890		)
Preferred Series C ($11.59 per share)																			(1,159		)	(1,159		)
Preferred Series D ($35.42 per share)																			(21,250		)	(21,250		)
Recognition of the fair value of share-based compensation								48,568														48,568
Other share-based compensation activity			5,014		50			4,389											(3,823		)	616
Shares sold to HIP			322		3			3,207														3,210
Other								119			(908	)	(9,001		)				(229		)	(9,111		)
Balance, end of period	$	1,071,227	1,087,731		$	10,877		$	9,863,149		(2,949	)	$	(26,933	)	$	(172,175	)	$	(359,380	)	$	10,386,765
Nine Months Ended September 30, 2017
Balance, beginning of period	$	1,071,227	1,088,641		$	10,886		$	9,881,277		(2,953	)	$	(27,384	)	$	(401,016	)	$	(226,844	)	$	10,308,146
Net income																			754,403			754,403
Other comprehensive income (loss)																31,053						31,053
Repurchases of common stock			(9,645	)	(96		)	(123,108		)												(123,204		)
Cash dividends declared:
Common ($0.24 per share)																			(260,919		)	(260,919		)
Preferred Series A ($63.75 per share)																			(23,110		)	(23,110		)
Preferred Series B ($28.96 per share)																			(1,028		)	(1,028		)
Preferred Series C ($44.07 per share)																			(4,407		)	(4,407		)
Preferred Series D ($46.88 per share)																			(28,125		)	(28,125		)
Recognition of the fair value of share-based compensation								72,747														72,747
Other share-based compensation activity			5,361		53			(11,928		)									(8,499		)	(20,374		)
Other	59		10		1			1,612			(468	)	(7,749		)				(256		)	(6,333		)
Balance, end of period	$	1,071,286	1,084,367		$	10,844		$	9,820,600		(3,421	)	$	(35,133	)	$	(369,963	)	$	201,215		$	10,698,849

See Notes to Unaudited Condensed Consolidated Financial Statements

44

Huntington Bancshares Incorporated

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016
Operating activities
Net income	$	754,403		$	472,858
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	136,206			115,896
Depreciation and amortization	307,063			299,444
Share-based compensation expense	72,747			48,568
Deferred income tax expense (benefit)	36,244			(18,094		)
Net gains on sales of securities	(3,781		)	(1,763		)
Impairment losses recognized in earnings on available-for-sale securities	3,687			76
Net change in:
Trading account securities	44,807			926
Loans held for sale	(164,405		)	(194,735		)
Accrued income and other assets	(136,485		)	(169,453		)
Accrued expense and other liabilities	42,162			144,496
Other, net	13,647			(12,413		)
Net cash provided by (used for) operating activities	1,106,295			685,806
Investing activities
Change in interest bearing deposits in banks	20,688			33,221
Cash paid for acquisition of a business, net of cash received	—			(133,218		)
Proceeds from:
Maturities and calls of available-for-sale and other securities	1,081,091			1,266,031
Maturities of held-to-maturity securities	792,996			850,170
Sales of available-for-sale and other securities	1,255,152			3,893,482
Purchases of available-for-sale and other securities	(3,208,608		)	(5,434,332		)
Purchases of held-to-maturity securities	(689,670		)	—
Net proceeds from sales of portfolio loans	427,142			352,277
Net loan and lease activity, excluding sales and purchases	(2,159,966		)	(3,286,238		)
Purchases of premises and equipment	(144,637		)	(63,688		)
Proceeds from sales of other real estate	25,156			21,765
Purchases of loans and leases	(112,859		)	(359,208		)
Other, net	11,556			(249		)
Net cash provided by (used for) investing activities	(2,701,959		)	(2,859,987		)
Financing activities
Increase (decrease) in deposits	2,837,396			853,806
Increase (decrease) in short-term borrowings	(1,865,157		)	363,518
Net proceeds from issuance of long-term debt	1,773,096			2,081,643
Maturity/redemption of long-term debt	(882,977		)	(684,746		)
Dividends paid on preferred stock	(56,632		)	(46,409		)
Dividends paid on common stock	(261,593		)	(168,656		)
Repurchases of common stock	(123,204		)	—
Proceeds from stock options exercised	9,316			6,084
Net proceeds from issuance of preferred stock	—			584,936
Payments related to tax-withholding for share based compensation awards	(25,613		)	—
Other, net	—			(1,212		)
Net cash provided by (used for) financing activities	1,404,632			2,988,964
Increase (decrease) in cash and cash equivalents	(191,032		)	814,783
Cash and cash equivalents at beginning of period	1,384,770			847,156
Cash and cash equivalents at end of period	$	1,193,738		$	1,661,939

45

	Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016
Supplemental disclosures:
Interest paid	$	307,493	$	159,357
Income taxes paid	71,165		3,869
Non-cash activities
Loans transferred to held-for-sale from portfolio	446,152		3,204,732
Loans transferred to portfolio from held-for-sale	4,751		92,585
Transfer of loans to OREO	23,691		18,678
Transfer of securities to held-to-maturity from available-for-sale	992,760		—

See Notes to Unaudited Condensed Consolidated Financial Statements

46

Huntington Bancshares Incorporated

Notes to Unaudited Condensed Consolidated Financial Statements

1. BASIS OF PRESENTATION

The accompanying Unaudited Condensed Consolidated Financial Statements of Huntington reflect all adjustments consisting of normal recurring accruals which are, in the opinion of Management, necessary for a fair statement of the consolidated financial position, the results of operations, and cash flows for the periods presented. The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. These Unaudited Condensed Consolidated Financial Statements have been prepared according to the rules and regulations of the SEC and, therefore, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been omitted. The Notes to Consolidated Financial Statements appearing in Huntington’s 2016 Form 10-K, which include descriptions of significant accounting policies, as updated by the information contained in this report, should be read in conjunction with these interim financial statements.

For statement of cash flow purposes, cash and cash equivalents are defined as the sum of “Cash and due from banks” which includes amounts on deposit with the Federal Reserve and “Federal funds sold and securities purchased under resale agreements.”

In conjunction with applicable accounting standards, all material subsequent events have been either recognized in the Unaudited Condensed Consolidated Financial Statements or disclosed in the Notes to Unaudited Condensed Consolidated Financial Statements.

Certain amounts reported in prior periods have been reclassified to conform to the current period presentation.

2. ACCOUNTING STANDARDS UPDATE

Standard	Summary of guidance	Effects on financial statements
ASU 2014-09 - Revenue from Contracts with Customers (Topic 606): Issued May 2014	- Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance. - Requires an entity to recognize revenue upon 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. - Also requires additional qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers - Guidance sets forth a five step approach for revenue recognition.	- Effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Management intends to adopt the new guidance on January 1, 2018 using the modified retrospective approach. - Management's analysis includes: (a) Identification of all revenue streams included in the financial statements; (b) Determination of scope exclusions to identify ‘in-scope’ revenue streams; (c) Determination of size, timing, and amount of revenue recognition for in-scope items; (d) Identification of contracts for further analysis; and (e) Completion of review of certain contracts to evaluate the potential impact of the new guidance. - Key revenue streams identified include service charges, credit card and payment processing fees, trust services fees, insurance income, brokerage services, and mortgage banking income. - The new guidance is not expected to have a significant impact on Huntington’s Unaudited Consolidated Financial Statements.

47

Standard	Summary of guidance	Effects on financial statements
ASU 2016-01 - Recognition and Measurement of Financial Assets and Financial Liabilities. Issued January 2016	- Improvements to GAAP disclosures including requiring an entity to: (a) Measure its equity investments with changes in the fair value recognized in the income statement. (b) Present separately in OCI 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 in accordance with the fair value option for financial instruments (i.e., FVO liability). (c) Use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. (d) Assess deferred tax assets related to a net unrealized loss on AFS securities in combination with the entity’s other deferred tax assets.	- Effective for the fiscal period beginning after December 15, 2017, including interim periods within those fiscal years. - Amendments are applied as a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2016-02 - Leases. Issued February 2016	- New lease accounting model for lessors and lessees. For lessees, virtually all leases will be required to be recognized on the balance sheet by recording a right-of-use asset and lease liability. Subsequent accounting for leases varies depending on whether the lease is an operating lease or a finance lease. - Accounting applied by a lessor is largely unchanged from that applied under the existing guidance. - Requires additional qualitative and quantitative disclosures with the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases.	- Effective for the fiscal period beginning after December 15, 2018, with early application permitted. - Management intends to adopt the guidance on January 1, 2019, and has formed a working group comprised of associates from different disciplines, including Procurement, Real Estate, and Credit Administration, to evaluate the impact of the standard where Huntington is a lessee or lessor, as well as any impact to borrower’s financial statements. - Management is currently assessing the impact of the new guidance on Huntington's Unaudited Consolidated Financial Statements, including working with associates engaged in the procurement of goods and services used in the entity’s operations, and reviewing contractual arrangements for embedded leases in an effort to identify Huntington’s full lease population. - Huntington will recognize right-of-use assets and lease liabilities for virtually all of its operating lease commitments.
ASU 2016-13 - Financial Instruments - Credit Losses. Issued June 2016	- Eliminates the probable recognition threshold for credit losses on financial assets measured at amortized cost. - Requires those financial assets to be presented at the net amount expected to be collected (i.e., net of expected credit losses). - Measurement of expected credit losses should be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount.	- Effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. - Applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. - Management intends to adopt the guidance on January 1, 2020 and has formed a working group comprised of teams from different disciplines including credit and finance to evaluate the requirements of the new standard and the impact it will have on our processes. - The early stages of this evaluation include a review of existing credit models to identify areas where existing credit models used to comply with other regulatory requirements may be leveraged and areas where new impairment models may be required.
ASU 2016-15 - Classification of Certain Cash Receipts and Cash Payments. Issued August 2016	- Clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. - Provides consistent principles for evaluating the classification of cash payments and receipts in the statement of cash flows to reduce diversity in practice with respect to several types of cash flows.	- Effective using a retrospective transition approach for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. - If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

48

Standard	Summary of guidance	Effects on financial statements
ASU 2017-04 - Simplifying the Test for Goodwill Impairment. Issued January 2017	- Simplifies the goodwill impairment test by eliminating Step 2 of the goodwill impairment process, which requires an entity to determine the implied fair value of its goodwill by assigning fair value to all its assets and liabilities. - Entities will instead recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. - Entities will still have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary.	- Effective for annual and interim goodwill tests performed in fiscal years beginning after December 15, 2019. Early adoption is permitted. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-07 - Improving the Presentation of Net Periodic Pension Cost and Periodic Postretirement Benefit Cost. Issued March 2017	- Requires that an employer report the service cost component of the pension cost and postretirement benefit cost in the same line items as other compensation costs arising from services rendered by the pertinent employees during the period. - Other components of the net benefit cost should be presented in the income statement separately from the service cost component.	- Effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-09 - Stock Compensation Modification Accounting. Issued May 2017	- Reduces the current diversity in practice and provides explicit guidance pertaining to the provisions of modification accounting. - Clarifies that an entity should account for effects of modification unless the fair value, vesting conditions and the classification of the modified award are the same as the original awards immediately before the original award is modified.	- Effective prospectively for annual periods and interim periods within those annual periods, beginning after December 15, 2017. Earlier application is permitted. - The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-12 - Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities. Issued August 2017	- Aligns the entity’s risk management activities and financial reporting for hedging relationships. - Requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. - Refines measurement techniques for hedges of benchmark interest rate risk. - Eliminates the separate measurement and reporting of hedge ineffectiveness. - Allows stated amount of assets in a closed portfolio to be fair value hedged by excluding proportion of hedged item related to prepayments, defaults and other events. - Eases hedge effectiveness testing including an option to perform qualitative testing.	- Effective for annual periods and interim periods within those annual periods, beginning after December 15, 2018. For cash flow and net investment hedges, cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness should be recognized in AOCI with a corresponding adjustment to retained earnings. Earlier application is permitted. - Huntington is considering adopting the new guidance on January 1, 2018. The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

3. LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES

Loans and leases which Huntington has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are classified in the Unaudited Condensed Consolidated Balance Sheets as loans and leases. Except for loans which are accounted for at fair value, loans are carried at the principal amount outstanding, net of unamortized premiums and discounts and deferred loan fees and costs and purchase accounting adjustments, which resulted in a net premium of $295 million and $120 million at September 30, 2017 and December 31, 2016, respectively.

49

Loan and Lease Portfolio Composition

The following table provides a detailed listing of Huntington’s loan and lease portfolio at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Loans and leases:
Commercial and industrial	$	27,469,344		$	28,058,712
Commercial real estate	7,206,096			7,300,901
Automobile	11,876,033			10,968,782
Home equity	9,984,728			10,105,774
Residential mortgage	8,616,059			7,724,961
RV and marine finance	2,371,065			1,846,447
Other consumer	1,063,971			956,419
Loans and leases	68,587,296			66,961,996
Allowance for loan and lease losses	(675,486		)	(638,413		)
Net loans and leases	$	67,911,810		$	66,323,583

FirstMerit Purchased Credit-Impaired Loans

The following table presents a rollforward of the accretable yield for purchased credit impaired loans for the three-month and nine-month period ended September 30, 2017.

	Three Months Ended September 30,			Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2017
Balance, beginning of period	$	36,509		$	36,669
Accretion	(4,343		)	(13,833		)
Reclassification (to) from nonaccretable difference	3,044			12,374
Balance, end of period	$	35,210		$	35,210

The following table reflects the ending and unpaid balances of the purchase credit impaired loans at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance		Ending Balance		Unpaid Principal Balance
Commercial and industrial	$	48,606	$	72,117	$	68,338	$	100,031
Commercial real estate	16,383		29,689		34,042		56,320
Total	$	64,989	$	101,806	$	102,380	$	156,351

There was no allowance for loan losses recorded on the purchased credit-impaired loan portfolio at September 30, 2017 and December 31, 2016.

Nonaccrual and Past Due Loans

Loans are considered past due when the contractual amounts due with respect to principal and interest are not received within 30 days of the contractual due date. See Note 1 “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 the accounting policies related to the NALs.

50

The following table presents nonaccrual loans (NALs) by loan class at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Commercial and industrial	$	169,751	$	234,184
Commercial real estate	17,397		20,508
Automobile	4,076		5,766
Home equity	71,353		71,798
Residential mortgage	75,251		90,502
RV and marine finance	309		245
Other consumer	108		—
Total nonaccrual loans	$	338,245	$	423,003

The following table presents an aging analysis of loans and leases, including past due loans, by loan class at September 30, 2017 and December 31, 2016. (1)

	September 30, 2017
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	$	36,505	$	10,654	$	77,835	$	124,994	$	27,295,744	$	48,606	$	—	$	27,469,344	$	14,083	(2)
Commercial real estate	35,444		2,586		20,010		58,040		7,131,673		16,383		—		7,206,096		9,550
Automobile	79,457		17,167		10,449		107,073		11,767,782		—		1,178		11,876,033		10,239
Home equity	41,748		19,601		63,747		125,096		9,857,359		—		2,273		9,984,728		16,150
Residential mortgage	111,722		45,041		104,167		260,930		8,260,742		—		94,387		8,616,059		62,832		(3)
RV and marine finance	10,303		2,184		2,134		14,621		2,355,309		—		1,135		2,371,065		2,063
Other consumer	10,180		4,394		3,752		18,326		1,045,427		—		218		1,063,971		3,752
Total loans and leases	$	325,359	$	101,627	$	282,094	$	709,080	$	67,714,036	$	64,989	$	99,191	$	68,587,296	$	118,669

	December 31, 2016
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	42,052		20,136		74,174		136,362		27,854,012		68,338		—		28,058,712		18,148		(2)
Commercial real estate	21,187		3,202		29,659		54,048		7,212,811		34,042		—		7,300,901		17,215
Automobile	76,283		17,188		10,442		103,913		10,862,715		—		2,154		10,968,782		10,182
Home equity	38,899		23,903		53,002		115,804		9,986,697		—		3,273		10,105,774		11,508
Residential mortgage	122,469		37,460		116,682		276,611		7,373,414		—		74,936		7,724,961		66,952		(3)
RV and marine finance	10,009		2,230		1,566		13,805		1,831,123		—		1,519		1,846,447		1,462
Other consumer	9,442		4,324		3,894		17,660		938,322		—		437		956,419		3,895
Total loans and leases	$	320,341	$	108,443	$	289,419	$	718,203	$	66,059,094	$	102,380	$	82,319	$	66,961,996	$	129,362

(1) NALs are included in this aging analysis based on their past due status.

(2) Amounts include Huntington Technology Finance administrative lease delinquencies.

(3) Amounts include loans guaranteed by government organizations.

51

Allowance for Credit Losses

Huntington maintains two reserves, both of which reflect Management’s judgment regarding the appropriate level necessary to absorb probable and estimable credit losses inherent in our loan and lease portfolio as of the balance sheet date: the ALLL and the AULC. Combined, these reserves comprise the total ACL. The determination of the ACL requires significant estimates, including the timing and amounts of expected future cash flows on impaired loans and leases, consideration of current economic conditions, and historical loss experience pertaining to pools of homogeneous loans and leases, all of which may be susceptible to change. See Note 1 “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 the accounting policies related to the ACL.

The ACL is increased through a provision for credit losses that is charged to earnings, based on Management’s quarterly evaluation and is reduced by charge-offs, net of recoveries, and the ACL associated with loans sold or transferred to held-for-sale.

The following table presents ALLL and AULC activity by portfolio segment for the three-month and nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2017:
ALLL balance, beginning of period	$	474,576		$	193,420		$	667,996
Loan charge-offs	(19,278		)	(45,494		)	(64,772		)
Recoveries of loans previously charged-off	10,015			11,865			21,880
Provision for (reduction in allowance) loan and lease losses	8,810			41,573			50,383
Allowance for loans sold or transferred to loans held for sale	(1		)	—			(1		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	82,827		$	2,532		$	85,359
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(6,528		)	(265		)	(6,793		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052
Nine-month period ended September 30, 2017:
ALLL balance, beginning of period	$	451,091		$	187,322		$	638,413
Loan charge-offs	(58,051		)	(133,884		)	(191,935		)
Recoveries of loans previously charged-off	33,619			39,946			73,565
Provision for (reduction in allowance) loan and lease losses	47,539			107,980			155,519
Allowance for loans sold or transferred to loans held for sale	(76		)	—			(76		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	86,543		$	11,336		$	97,879
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(10,244		)	(9,069		)	(19,313		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052

52

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2016:
ALLL balance, beginning of period	$	424,507		$	198,557		$	623,064
Loan charge-offs	(24,839		)	(34,429		)	(59,268		)
Recoveries of loans previously charged-off	8,312			10,891			19,203
Provision for (reduction in allowance) loan and lease losses	36,689			16,834			53,523
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,750		)	(19,624		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,717		$	10,031		$	73,748
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	9,739			543			10,282
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331
Nine-month period ended September 30, 2016:
ALLL balance, beginning of period	$	398,753		$	199,090		$	597,843
Loan charge-offs	(70,721		)	(91,784		)	(162,505		)
Recoveries of loans previously charged-off	62,127			35,006			97,133
Provision for (reduction in allowance) loan and lease losses	54,510			49,437			103,947
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,646		)	(19,520		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,448		$	8,633		$	72,081
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	10,008			1,941			11,949
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331

Credit Quality Indicators

See Note 4 “Loans / Leases and Allowance for Credit Losses” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for a description of the credit quality indicators Huntington utilizes for monitoring credit quality and for determining an appropriate ACL level.

53

The following table presents each loan and lease class by credit quality indicator at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	25,447,805	$	803,540	$	1,189,789	$	28,210	$	27,469,344
Commercial real estate	6,934,670		144,122		126,352		952		7,206,096
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,939,409	$	4,278,062	$	1,371,574	$	285,810	$	11,874,855
Home equity	6,359,778		2,985,933		621,817		14,927		9,982,455
Residential mortgage	5,311,993		2,479,820		599,055		130,804		8,521,672
RV and marine finance	1,385,176		853,545		91,302		39,907		2,369,930
Other consumer	404,047		510,804		136,346		12,556		1,063,753

	December 31, 2016
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	26,211,885	$	810,287	$	1,028,819	$	7,721	$	28,058,712
Commercial real estate	7,042,304		96,975		159,098		2,524		7,300,901
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,369,085	$	4,043,611	$	1,298,460	$	255,472	$	10,966,628
Home equity	6,280,328		2,891,330		637,560		293,283		10,102,501
Residential mortgage	4,662,777		2,285,121		615,067		87,060		7,650,025
RV and marine finance	1,064,143		644,039		72,995		63,751		1,844,928
Other consumer	346,867		455,959		133,243		19,913		955,982

(1) Excludes loans accounted for under the fair value option.

(2) Reflects most recent customer credit scores.

(3) Reflects deferred fees and costs, loans in process, loans to legal entities, etc.

54

Impaired Loans

See Note 1 “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 accounting policies related to impaired loans.

The following tables present the balance of the ALLL attributable to loans by portfolio segment individually and collectively evaluated for impairment and the related loan and lease balance at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at September 30, 2017:
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	22,838		13,874		36,712
Attributable to loans collectively evaluated for impairment	451,284		187,490		638,774
Total ALLL balance	$	474,122	$	201,364	$	675,486
Loan and Lease Ending Balances at September 30, 2017: (1)
Portion of loan and lease ending balance:
Purchased credit-impaired loans	$	64,989	$	—	$	64,989
Individually evaluated for impairment	566,340		621,808		1,188,148
Collectively evaluated for impairment	34,044,110		33,190,856		67,234,966
Total loans and leases evaluated for impairment	$	34,675,439	$	33,812,664	$	68,488,103

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at December 31, 2016
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	$	10,525	$	11,021	$	21,546
Attributable to loans collectively evaluated for impairment	440,566		176,301		616,867
Total ALLL balance:	$	451,091	$	187,322	$	638,413
Loan and Lease Ending Balances at December 31, 2016 (1)
Portion of loan and lease ending balances:
Purchased credit-impaired loans	$	102,380	$	—	$	102,380
Individually evaluated for impairment	415,624		457,890		873,514
Collectively evaluated for impairment	34,841,609		31,062,174		65,903,783
Total loans and leases evaluated for impairment	$	35,359,613	$	31,520,064	$	66,879,677

(1) Excludes loans accounted for under the fair value option.

55

The following tables present by class the ending, unpaid principal balance, and the related ALLL, along with the average balance and interest income recognized only for impaired loans and leases and purchased credit-impaired loans: (1), (2)

	September 30, 2017						Three Months Ended September 30, 2017				Nine Months Ended September 30, 2017
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,349	$	324,474	$	—	$	294,513	$	4,969	$	227,611	$	7,467
Commercial real estate	65,382		92,215		—		71,277		1,825		80,388		5,762
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	213,520		245,328		19,958		222,745		1,950		334,297		12,712
Commercial real estate	53,078		60,366		2,880		40,672		468		54,352		1,388
Automobile	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance	1,520		1,520		88		1,425		23		884		58
Other consumer	6,456		6,456		1,288		6,944		47		7,117		184
Total
Commercial and industrial (3)	512,869		569,802		19,958		517,258		6,919		561,908		20,179
Commercial real estate (4)	118,460		152,581		2,880		111,949		2,293		134,740		7,150
Automobile (2)	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity (5)	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage (5)	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance (2)	1,520		1,520		88		1,425		23		884		58
Other consumer (2)	6,456		6,456		1,288		6,944		47		7,117		184

56

	December 31, 2016						Three Months Ended September 30, 2016				Nine Months Ended September 30, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,606	$	358,712	$	—	$	305,956	$	2,235	$	290,163	$	4,858
Commercial real estate	88,817		126,152		—		80,000		907		58,666		2,257
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	406,243		448,121		22,259		281,934		1,631		274,262		5,460
Commercial real estate	97,238		107,512		3,434		49,140		521		49,587		1,895
Automobile	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance	—		—		—		—		—		—		—
Other consumer	3,897		3,897		260		4,454		58		4,627		178
Total
Commercial and industrial (3)	705,849		806,833		22,259		587,890		3,866		564,425		10,318
Commercial real estate (4)	186,055		233,664		3,434		129,140		1,428		108,253		4,152
Automobile (2)	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity (5)	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage (5)	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance (2)	—		—		—		—		—		—		—
Other consumer (2)	3,897		3,897		260		4,454		58		4,627		178

(1) These tables do not include loans fully charged-off.

(2) All automobile, RV and marine finance and other consumer impaired loans included in these tables are considered impaired due to their status as a TDR.

(3) At September 30, 2017 and December 31, 2016, commercial and industrial loans of $365 million and $317 million, respectively, were considered impaired due to their status as a TDR.

(4) At September 30, 2017 and December 31, 2016, commercial real estate loans of $84 million and $81 million, respectively, were considered impaired due to their status as a TDR.

(5) Includes home equity and residential mortgages considered to be collateral dependent due to their non-accrual status as well as home equity and mortgage loans considered impaired due to their status as a TDR.

(6) The differences between the ending balance and unpaid principal balance amounts represent partial charge-offs.

TDR Loans

TDRs are modified loans where a concession was provided to a borrower experiencing financial difficulties. Loan modifications are considered TDRs when the concessions provided are not available to the borrower through either normal channels or other sources. However, not all loan modifications are TDRs. Acquired, non-purchased credit impaired loans are only considered for TDR reporting for modifications made subsequent to acquisition. See Note 4 “Loans / Leases and Allowance for Credit Losses” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for an additional discussion of TDRs.

57

The following table presents, by class and modification type, the number of contracts, post-modification outstanding balance, and the financial effects of the modification for the three-month and nine-month periods ended September 30, 2017 and 2016.

	New Troubled Debt Restructurings During The Three-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	6	$	817	$	—		2	$	122	$	6
Amortization or maturity date change	271	138,381		(837		)	246	89,100		(1,450		)
Other	—	—		—			6	711		(2		)
Total Commercial and industrial	277	139,198		(837		)	254	89,933		(1,446		)
Commercial real estate:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	28	17,811		133			30	11,183		(546		)
Other	—	—		—			—	—		—
Total commercial real estate:	28	17,811		133			30	11,183		(546		)
Automobile:
Interest rate reduction	5	72		3			4	26		3
Amortization or maturity date change	487	3,943		124			452	4,438		559
Chapter 7 bankruptcy	305	2,562		69			236	1,840		157
Other	—	—		—			—	—		—
Total Automobile	797	6,577		196			692	6,304		719
Home equity:
Interest rate reduction	8	376		11			14	352		10
Amortization or maturity date change	160	11,676		(1,131		)	110	6,740		(574		)
Chapter 7 bankruptcy	79	2,728		647			70	2,395		1,327
Other	—	—		—			—	—		—
Total Home equity	247	14,780		(473		)	194	9,487		763
Residential mortgage:
Interest rate reduction	—	—		—			2	134		(2		)
Amortization or maturity date change	102	11,282		(272		)	77	7,988		(220		)
Chapter 7 bankruptcy	20	1,656		(2		)	17	1,105		(63		)
Other	1	64		2			3	260		—
Total Residential mortgage	123	13,002		(272		)	99	9,487		(285		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	10	84		3			—	—		—
Chapter 7 bankruptcy	22	492		15			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	32	576		18			—	—		—
Other consumer:
Interest rate reduction	18	52		—			—	—		—
Amortization or maturity date change	677	3,106		1			1	16		—
Chapter 7 bankruptcy	4	24		1			1	6		—
Other	—	—		—			—	—		—
Total Other consumer	699	3,182		2			2	22		—
Total new troubled debt restructurings	2,203	$	195,126	$	(1,233	)	1,271	$	126,416	$	(795	)

58

	New Troubled Debt Restructurings During The Nine-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	8	$	854	$	6		4	$	161	$	5
Amortization or maturity date change	735	418,924		(8,695		)	629	345,691		(4,368		)
Other	4	380		(27		)	16	1,801		(4		)
Total Commercial and industrial	747	420,158		(8,716		)	649	347,653		(4,367		)
Commercial real estate:
Interest rate reduction	—	—		—			1	84		—
Amortization or maturity date change	71	74,101		(682		)	90	60,995		(1,828		)
Other	—	—		—			4	315		16
Total commercial real estate:	71	74,101		(682		)	95	61,394		(1,812		)
Automobile:
Interest rate reduction	24	308		9			11	132		10
Amortization or maturity date change	1,298	11,097		302			1,159	11,002		981
Chapter 7 bankruptcy	743	5,878		116			797	6,384		386
Other	—	—		—			—	—		—
Total Automobile	2,065	17,283		427			1,967	17,518		1,377
Home equity:
Interest rate reduction	25	1,444		24			43	2,363		103
Amortization or maturity date change	401	25,544		(2,559		)	466	25,031		(2,592		)
Chapter 7 bankruptcy	243	8,764		2,049			215	8,106		2,327
Other	70	4,241		(326		)	—	—		—
Total Home equity	739	39,993		(812		)	724	35,500		(162		)
Residential mortgage:
Interest rate reduction	2	110		(9		)	12	1,195		(17		)
Amortization or maturity date change	282	30,649		(761		)	277	29,388		(1,217		)
Chapter 7 bankruptcy	69	6,328		(139		)	40	3,788		(42		)
Other	22	2,448		19			4	424		—
Total Residential mortgage	375	39,535		(890		)	333	34,795		(1,276		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	34	710		19			—	—		—
Chapter 7 bankruptcy	71	1,246		25			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	105	1,956		44			—	—		—
Other consumer:
Interest rate reduction	19	130		2			—	—		—
Amortization or maturity date change	681	3,394		8			6	575		24
Chapter 7 bankruptcy	7	36		1			8	72		7
Other	—	—		—			—	—		—
Total Other consumer	707	3,560		11			14	647		31
Total new troubled debt restructurings	4,809	$	596,586	$	(10,618	)	3,782	$	497,507	$	(6,209	)

(1) TDRs may include multiple concessions and the disclosure classifications are based on the primary concession provided to the borrower.

(2) Amount represents the financial impact via provision for loan and lease losses as a result of the modification.

Pledged Loans and Leases

At September 30, 2017, the Bank has access to the Federal Reserve’s discount window and advances from the FHLB – Cincinnati. As of September 30, 2017, these borrowings and advances are secured by $32.0 billion of loans and securities.

59

4. AVAILABLE-FOR-SALE AND OTHER SECURITIES

Listed below are the contractual maturities of available-for-sale and other securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
U.S. Treasury and Federal agency securities:
U.S. Treasury:
1 year or less	$	11,256	$	11,260	$	4,978	$	4,988
After 1 year through 5 years	—		—		502		509
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		—		—
Total U.S. Treasury	11,256		11,260		5,480		5,497
Federal agencies: mortgage-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	32,749		32,515		46,591		46,762
After 5 years through 10 years	257,032		255,488		173,941		176,404
After 10 years	10,496,277		10,351,747		10,630,929		10,450,176
Total Federal agencies: mortgage-backed securities	10,786,058		10,639,750		10,851,461		10,673,342
Other agencies:
1 year or less	4,201		4,223		4,302		4,367
After 1 year through 5 years	8,892		9,034		5,092		5,247
After 5 years through 10 years	82,692		83,194		63,618		63,928
After 10 years	—		—		—		—
Total other agencies	95,785		96,451		73,012		73,542
Total U.S. Treasury and Federal agency securities	10,893,099		10,747,461		10,929,953		10,752,381
Municipal securities:
1 year or less	163,747		160,032		169,636		166,887
After 1 year through 5 years	905,872		905,075		933,893		933,903
After 5 years through 10 years	1,656,860		1,655,384		1,463,459		1,464,583
After 10 years	703,350		705,618		693,440		684,684
Total municipal securities	3,429,829		3,426,109		3,260,428		3,250,057
Asset-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	80,003		80,330		80,700		80,560
After 5 years through 10 years	162,079		163,439		223,352		224,565
After 10 years	326,724		311,422		520,072		488,356
Total asset-backed securities	568,806		555,191		824,124		793,481
Corporate debt:
1 year or less	3,143		3,157		43,223		43,603
After 1 year through 5 years	66,878		68,450		78,430		80,196
After 5 years through 10 years	38,471		39,902		32,523		32,865
After 10 years	13,211		14,120		40,361		42,019
Total corporate debt	121,703		125,629		194,537		198,683
Other:
1 year or less	3,150		3,144		1,650		1,650
After 1 year through 5 years	800		791		2,302		2,283
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		10		10
Nonmarketable equity securities	583,019		583,019		547,704		547,704
Mutual funds	10,416		10,416		15,286		15,286
Marketable equity securities	861		1,301		861		1,302
Total other	598,246		598,671		567,813		568,235
Total available-for-sale and other securities	$	15,611,683	$	15,453,061	$	15,776,855	$	15,562,837

60

Other securities at September 30, 2017 and December 31, 2016 include non-marketable equity securities of $287 million and $249 million of stock issued by the FHLB and $296 million and $299 million of Federal Reserve Bank stock, respectively. Non-marketable equity securities are recorded at amortized cost.

The following tables provide amortized cost, fair value, and gross unrealized gains and losses recognized in OCI by investment category at September 30, 2017 and December 31, 2016:

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
U.S. Treasury	$	11,256	$	4	$	—		$	11,260
Federal agencies:
Mortgage-backed securities	10,786,058		5,851		(152,159		)	10,639,750
Other agencies	95,785		722		(56		)	96,451
Total U.S. Treasury, Federal agency securities	10,893,099		6,577		(152,215		)	10,747,461
Municipal securities	3,429,829		31,043		(34,763		)	3,426,109
Asset-backed securities	568,806		2,409		(16,024		)	555,191
Corporate debt	121,703		3,927		(1		)	125,629
Other securities	598,246		439		(14		)	598,671
Total available-for-sale and other securities	$	15,611,683	$	44,395	$	(203,017	)	$	15,453,061

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
U.S. Treasury	$	5,480	$	17	$	—		$	5,497
Federal agencies:
Mortgage-backed securities	10,851,461		12,548		(190,667		)	10,673,342
Other agencies	73,012		536		(6		)	73,542
Total U.S. Treasury, Federal agency securities	10,929,953		13,101		(190,673		)	10,752,381
Municipal securities	3,260,428		28,431		(38,802		)	3,250,057
Asset-backed securities	824,124		1,492		(32,135		)	793,481
Corporate debt	194,537		4,161		(15		)	198,683
Other securities	567,813		441		(19		)	568,235
Total available-for-sale and other securities	$	15,776,855	$	47,626	$	(261,644	)	$	15,562,837

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The following tables provide detail on investment securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position as of September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,283,266	$	(125,950	)	$	1,003,097	$	(26,209	)	$	9,286,363	$	(152,159	)
Other agencies	11,607		(56		)	—		—			11,607		(56		)
Total Federal agency securities	8,294,873		(126,006		)	1,003,097		(26,209		)	9,297,970		(152,215		)
Municipal securities	1,293,344		(23,995		)	277,157		(10,768		)	1,570,501		(34,763		)
Asset-backed securities	199,109		(1,471		)	122,568		(14,553		)	321,677		(16,024		)
Corporate debt	200		(1		)	—		—			200		(1		)
Other securities	791		(8		)	1,494		(6		)	2,285		(14		)
Total temporarily impaired securities	$	9,788,317	$	(151,481	)	$	1,404,316	$	(51,536	)	$	11,192,633	$	(203,017	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	8,908,470	$	(189,318	)	$	41,706	$	(1,349	)	$	8,950,176	$	(190,667	)
Other agencies	924		(6		)	—		—			924		(6		)
Total Federal agency securities	8,909,394		(189,324		)	41,706		(1,349		)	8,951,100		(190,673		)
Municipal securities	1,412,152		(29,175		)	272,292		(9,627		)	1,684,444		(38,802		)
Asset-backed securities	361,185		(3,043		)	178,924		(29,092		)	540,109		(32,135		)
Corporate debt	3,567		(15		)	200		—			3,767		(15		)
Other securities	790		(11		)	1,492		(8		)	2,282		(19		)
Total temporarily impaired securities	$	10,687,088	$	(221,568	)	$	494,614	$	(40,076	)	$	11,181,702	$	(261,644	)

At September 30, 2017 and December 31, 2016, the carrying value of investment securities pledged to secure public and trust deposits, trading account liabilities, U.S. Treasury demand notes, and security repurchase agreements totaled $6.2 billion and $5.0 billion, respectively. There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10% of shareholders’ equity at either September 30, 2017 or December 31, 2016.

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The following table is a summary of realized securities gains and losses for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Gross gains on sales of securities	$	4,201		$	3,770		$	8,311		$	7,161
Gross (losses) on sales of securities	(4,130		)	(2,739		)	(4,530		)	(5,398		)
Net gain on sales of securities	$	71		$	1,031		$	3,781		$	1,763
OTTI recognized in earnings	(104		)	—			(3,687		)	(76		)
Net securities gains (losses)	$	(33	)	$	1,031		$	94		$	1,687

Security Impairment

Huntington evaluates the available-for-sale securities portfolio on a quarterly basis for impairment and conducts a comprehensive security-level assessment on all available-for-sale securities. Impairment exists when the present value of the expected cash flows are not sufficient to recover the entire amortized cost basis at the balance sheet date. Under these circumstances, any credit impairment would be recognized in earnings. At the end of the second quarter of 2017, Huntington changed its intent from able and willing to hold to sell sometime in the near future prior to final maturity for the two Reg Diversified CDO securities. Related to this change in intent, Huntington estimated the fair value of these bonds by obtaining bids. As a result of this analysis, Huntington recognized $3.6 million of OTTI on these two securities. In addition, Huntington recognized an additional $0.1 million of OTTI in the 2017 third quarter relating an investment in the Municipal Securities portfolio. For all other securities, Huntington does not intend to sell, nor does it believe it will be required to sell these securities until the amortized cost is recovered, which may be at maturity.

The highest risk investments in the portfolio are the trust-preferred CDO securities which are in the asset-backed securities portfolio. This portfolio is in runoff, and the Company has not purchased these types of securities since 2005. The fair values of the CDO assets have been impacted by various market conditions. The unrealized losses are primarily the result of wider liquidity spreads on asset-backed securities and the longer expected average lives of the trust-preferred CDO securities, due to changes in the expectations of when the underlying securities will be repaid.

Collateralized Debt Obligations are backed by a pool of debt securities issued by financial institutions. The collateral generally consists of trust-preferred securities and subordinated debt securities issued by banks, bank holding companies, and insurance companies. Many collateral issuers have the option of deferring interest payments on their debt for up to five years. A full cash flow analysis is used to estimate fair values and assess impairment for each security within this portfolio. A third-party pricing specialist with direct industry experience in pooled-trust-preferred security evaluations is engaged to provide assistance estimating the fair value and expected cash flows on this portfolio. The full cash flow analysis is completed by evaluating the relevant credit and structural aspects of each pooled-trust-preferred security in the portfolio, including collateral performance projections for each piece of collateral in the security and terms of the security’s structure. The credit review includes an analysis of profitability, credit quality, operating efficiency, leverage, and liquidity using available financial and regulatory information for each underlying collateral issuer. The analysis also includes a review of historical industry default data, current / near-term operating conditions, and the impact of macroeconomic and regulatory changes.  Using the results of the analysis, the Company estimates appropriate default and recovery probabilities for each piece of collateral, then estimates the expected cash flows for each security. The fair value of each security is obtained by discounting the expected cash flows at a market discount rate. The market discount rate is determined by reference to yields observed in the market for similarly rated collateralized debt obligations, specifically high-yield collateralized loan obligations. The relatively high market discount rate is reflective of the uncertainty of the cash flows and illiquid nature of these securities. The large differential between the fair value and amortized cost of some of the securities reflects the high market discount rate and the expectation that the majority of the cash flows will not be received until near the final maturity of the security (the final maturities range from 2032 to 2035).

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The following table summarizes the relevant characteristics of the Company's CDO securities portfolio, which are included in asset-backed securities, at September 30, 2017. Each security is part of a pool of issuers and supports a more senior tranche of securities except for the MM Comm III securities, which are the most senior class.

Collateralized Debt Obligation Securities

(dollar amounts in thousands)										Lowest Credit Rating (2)	# of Issuers Currently Performing/ Remaining (3)	Actual Deferrals and Defaults as a % of Original Collateral	Expected Defaults as a % of Remaining Performing Collateral	Excess Subordination (4)
Deal Name	Par Value		Amortized Cost		Fair Value		Unrealized Loss (1)
MM Comm III	4,509		4,308		3,641		(667		)	BB+	5/8	5	7	34
Reg Diversified	25,500		100		510		410			D		—	—	—
Tropic III	31,000		30,989		19,976		(11,013		)	BB	27/36	16	6	41
Total at September 30, 2017	$	61,009	$	35,397	$	24,127	$	(11,270	)
Total at December 31, 2016	$	137,197	$	101,210	$	76,003	$	(25,207	)

(1) The majority of securities have been in a continuous loss position for 12 months or longer.

(2) For purposes of comparability, the lowest credit rating expressed is equivalent to Fitch ratings even where the lowest rating is based on another nationally recognized credit rating agency.

(3) Includes both banks and/or insurance companies.

(4) Excess subordination percentage represents the additional defaults in excess of both current and projected defaults that the CDO can absorb before the bond experiences credit impairment. Excess subordinated percentage is calculated by (a) determining what percentage of defaults a deal can experience before the bond has credit impairment, and (b) subtracting from this default breakage percentage both total current and expected future default percentages.

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For the three-month and nine-month periods ended September 30, 2017 and 2016, the following table summarizes by security type the total OTTI losses recognized in the Unaudited Condensed Consolidated Statements of Income for securities evaluated for impairment as described above.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Available-for-sale and other securities:
Collateralized Debt Obligations	$	—	$	—	$	3,559	$	—
Municipal Securities	104		—		128		76
Total available-for-sale and other securities	$	104	$	—	$	3,687	$	76

The following table presents the OTTI recognized in earnings on debt securities held by Huntington for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Balance, beginning of period	$	10,821		$	9,831		$	11,796		$	18,368
Reductions from sales	(5,373		)	(76		)	(9,931		)	(8,689		)
Additional credit losses	104			—			3,687			76
Balance, end of period	$	5,552		$	9,755		$	5,552		$	9,755

5. HELD-TO-MATURITY SECURITIES

Held-to-maturity securities are debt securities that Huntington has the intent and ability to hold until maturity. The debt securities are carried at amortized cost and adjusted for amortization of premiums and accretion of discounts using the interest method.

During the second quarter of 2017, Huntington transferred $1.0 billion of mortgage-backed and other agency securities from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The securities were reclassified at fair value at the date of transfer. At the time of the transfer, $13.5 million of unrealized net losses were recognized in OCI. The amounts in OCI will be recognized in earnings over the remaining life of the securities as an offset to the adjustment of yield in a manner consistent with the amortization of the premium on the same transferred securities, resulting in an immaterial impact on net income.

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Listed below are the contractual maturities of held-to-maturity securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Federal agencies mortgage-backed securities:
1 year or less	$	—	$	—	$	—	$	—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	68,668		68,478		41,261		40,791
After 10 years	8,067,957		8,035,777		7,157,083		7,139,943
Total Federal agencies mortgage-backed securities	8,136,625		8,104,255		7,198,344		7,180,734
Other agencies:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	375,580		376,393		398,341		399,452
After 10 years	170,628		169,741		204,083		201,180
Total other agencies	546,208		546,134		602,424		600,632
Total Federal agencies	8,682,833		8,650,389		7,800,768		7,781,366
Municipal securities:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	—		—		—		—
After 10 years	5,566		5,416		6,171		5,902
Total municipal securities	5,566		5,416		6,171		5,902
Total held-to-maturity securities	$	8,688,399	$	8,655,805	$	7,806,939	$	7,787,268

The following table provides amortized cost, gross unrealized gains and losses, and fair value by investment category at September 30, 2017 and December 31, 2016.

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,136,625	$	14,868	$	(47,238	)	$	8,104,255
Other agencies	546,208		1,697		(1,771		)	546,134
Total Federal agencies	8,682,833		16,565		(49,009		)	8,650,389
Municipal securities	5,566		—		(150		)	5,416
Total held-to-maturity securities	$	8,688,399	$	16,565	$	(49,159	)	$	8,655,805

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	7,198,344	$	20,883	$	(38,493	)	$	7,180,734
Other agencies	602,424		1,690		(3,482		)	600,632
Total Federal agencies	7,800,768		22,573		(41,975		)	7,781,366
Municipal securities	6,171		—		(269		)	5,902
Total held-to-maturity securities	$	7,806,939	$	22,573	$	(42,244	)	$	7,787,268

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The following tables provide detail on held-to-maturity securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position, at September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	5,729,896	$	(38,204	)	$	301,637	$	(9,034	)	$	6,031,533	$	(47,238	)
Other agencies	248,109		(1,771		)	—		—			248,109		(1,771		)
Total Federal agencies	5,978,005		(39,975		)	301,637		(9,034		)	6,279,642		(49,009		)
Municipal securities	—		—			5,416		(150		)	5,416		(150		)
Total temporarily impaired securities	$	5,978,005	$	(39,975	)	$	307,053	$	(9,184	)	$	6,285,058	$	(49,159	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	2,855,360	$	(31,470	)	$	186,226	$	(7,023	)	$	3,041,586	$	(38,493	)
Other agencies	413,207		(3,482		)	—		—			413,207		(3,482		)
Total Federal agencies	3,268,567		(34,952		)	186,226		(7,023		)	3,454,793		(41,975		)
Municipal securities	5,902		(269		)	—		—			5,902		(269		)
Total temporarily impaired securities	$	3,274,469	$	(35,221	)	$	186,226	$	(7,023	)	$	3,460,695	$	(42,244	)

Security Impairment

Huntington evaluates the held-to-maturity securities portfolio on a quarterly basis for impairment. Impairment exists when the present value of the expected cash flows is not sufficient to recover the entire amortized cost basis at the balance sheet date. Under these circumstances, any impairment would be recognized in earnings. As of September 30, 2017, Management has evaluated held-to-maturity securities with unrealized losses for impairment and concluded no OTTI is required.

6. LOAN SALES AND SECURITIZATIONS

Residential Mortgage Loans

The following table summarizes activity relating to residential mortgage loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Residential mortgage loans sold with servicing retained	$	1,178,955	$	1,204,547	$	2,824,707	$	2,552,602
Pretax gains resulting from above loan sales (1)	26,880		32,073		66,014		64,804

(1) Recorded in mortgage banking income.

A mortgage servicing right (MSR) is established only when the servicing is contractually separated from the underlying mortgage loans by sale or securitization of the loans with servicing rights retained. At initial recognition, the MSR asset is established at its fair value using assumptions consistent with assumptions used to estimate the fair value of existing MSRs. Subsequent to the initial recognition, MSRs may be measured using either the fair value method or the amortization method. The election of the fair value method or amortization method is made at the time each servicing class is established. Subsequently, servicing rights are accounted for based on the methodology chosen for each respective servicing class. Any

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increase or decrease in the fair value of MSRs carried under the fair value method, as well as amortization or impairment of MSRs recorded using the amortization method, during the period is recorded as an increase or decrease in mortgage banking income, which is reflected in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

The following tables summarize the changes in MSRs recorded using either the fair value method or the amortization method for the three-month and nine-month periods ended September 30, 2017 and 2016.

Fair Value Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Fair value, beginning of period	$	12,528		$	13,105		$	13,747		$	17,585
Change in fair value during the period due to:
Time decay (1)	(202		)	(217		)	(649		)	(734		)
Payoffs (2)	(295		)	(423		)	(876		)	(1,392		)
Changes in valuation inputs or assumptions (3)	(278		)	(37		)	(469		)	(3,031		)
Fair value, end of period:	$	11,753		$	12,428		$	11,753		$	12,428
Weighted-average life (years)	5.5			5.1			5.5			5.1

(1) Represents decrease in value due to passage of time, including the impact from both regularly scheduled loan principal payments and partial loan paydowns.

(2) Represents decrease in value associated with loans that paid off during the period.

(3) Represents change in value resulting primarily from market-driven changes in interest rates and prepayment speeds.

Amortization Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	176,491		$	121,292		$	172,466		$	143,133
New servicing assets created	12,841			12,434			30,694			25,820
Servicing assets acquired	—			15,317			—			15,317
Impairment (charge) / recovery	688			2,543			(318		)	(21,093		)
Amortization and other	(6,995		)	(7,194		)	(19,817		)	(18,785		)
Carrying value, end of period	$	183,025		$	144,392		$	183,025		$	144,392
Fair value, end of period	$	183,583		$	144,623		$	183,583		$	144,623
Weighted-average life (years)	7.0			6.1			7.0			6.1

MSRs do not trade in an active, open market with readily-observable prices. While sales of MSRs occur, the precise terms and conditions are typically not readily available. Therefore, the fair value of MSRs is estimated using a discounted future cash flow model. The model considers portfolio characteristics, contractually-specified servicing fees and assumptions related to prepayments, delinquency rates, late charges, other ancillary revenues, costs to service, and other economic factors. Changes in the assumptions used may have a significant impact on the valuation of MSRs.

MSR values are sensitive to movements in interest rates, as expected future net servicing income depends on the projected outstanding principal balances of the underlying loans, which can be greatly impacted by the level of prepayments. Huntington hedges the value of the MSRs against changes in value attributable to changes in interest rates using a combination of derivative instruments and trading securities.

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For MSRs under the fair value method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	12.10	%	$	(472	)	$	(910	)	10.90	%	$	(501	)	$	(970	)
Spread over forward interest rate swap rates	813	bps	(436		)	(823		)	536	bps	(454		)	(879		)

For MSRs under the amortization method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	8.40	%	$	(5,172	)	$	(10,038	)	7.80	%	$	(4,510	)	$	(8,763	)
Spread over forward interest rate swap rates	1,041	bps	(6,866		)	(12,934		)	1,173	bps	(5,259		)	(10,195		)

Total servicing, late and other ancillary fees included in mortgage banking income amounted to $14 million and $13 million for the three-month periods ended September 30, 2017 and 2016. For the nine-month periods ended September 30, 2017 and 2016, total net servicing fees included in mortgage banking income were $42 million and $36 million. The unpaid principal balance of residential mortgage loans serviced for third parties was $19.3 billion and $18.9 billion at September 30, 2017 and December 31, 2016, respectively.

Automobile Loans

Huntington has retained servicing responsibilities on sold automobile loans and receives annual servicing fees and other ancillary fees on the outstanding loan balances. Automobile loan servicing rights are accounted for using the amortization method. A servicing asset is established at fair value at the time of the sale. The servicing asset is then amortized against servicing income. Impairment, if any, is recognized when carrying value exceeds the fair value as determined by calculating the present value of expected net future cash flows. The primary risk characteristic for measuring servicing assets is payoff rates of the underlying loan pools. Valuation calculations rely on the predicted payoff assumption and, if actual payoff is quicker than expected, then future value would be impaired

Changes in the carrying value of automobile loan servicing rights for the three-month and nine-month periods ended September 30, 2017 and 2016, and the fair value at the end of each period were as shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	12,524		$	5,458		$	18,285		$	8,771
Amortization and other	(2,338		)	(1,087		)	(8,099		)	(4,400		)
Carrying value, end of period	$	10,186		$	4,371		$	10,186		$	4,371
Fair value, end of period	$	10,398		$	4,366		$	10,398		$	4,366
Weighted-average contractual life (years)	3.7			3.2			3.7			3.2

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A summary of key assumptions and the sensitivity of the automobile loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	23.66	%	$	(586	)	$	(1,112	)	19.98	%	$	(1,047	)	$	(2,026	)
Spread over forward interest rate swap rates	500	bps	(14		)	(27		)	500	bps	(26		)	(53		)

Servicing income amounted to $4 million and $2 million for the three-month periods ending September 30, 2017, and 2016. For the nine-month periods ended September 30, 2017 and 2016, total servicing income was $14 million and $6 million, respectively. The unpaid principal balance of automobile loans serviced for third parties was $1.2 billion and $1.7 billion at September 30, 2017 and December 31, 2016, respectively.

Small Business Administration (SBA) Portfolio

The following table summarizes activity relating to SBA loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
SBA loans sold with servicing retained	$	107,259	$	62,803	$	272,635	$	167,321
Pretax gains resulting from above loan sales (1)	8,508		4,679		21,435		12,862

(1) Recorded in gain on sale of loans.

Huntington has retained servicing responsibilities on sold SBA loans and receives annual servicing fees on the outstanding loan balances. SBA loan servicing rights are accounted for using the amortization method. A servicing asset is established at fair value at the time of the sale using a discounted future cash flow model. The servicing asset is then amortized against servicing income. Impairment, if any, is recognized when carrying value exceeds the fair value as determined by calculating the present value of expected net future cash flows.

The following tables summarize the changes in the carrying value of the servicing asset for the three-month and nine-month periods ended September 30, 2017 and 2016. The fair value at the end of each period is shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	23,113		$	19,612		$	21,080		$	19,747
New servicing assets created	3,591			1,879			9,187			5,259
Amortization and other	(1,923		)	(1,745		)	(5,486		)	(5,260		)
Carrying value, end of period	$	24,781		$	19,746		$	24,781		$	19,746
Fair value, end of period	$	28,822		$	24,065		$	28,822		$	24,065
Weighted-average life (years)	3.3			3.3			3.3			3.3

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A summary of key assumptions and the sensitivity of the SBA loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	7.50	%	$	(385	)	$	(764	)	7.40	%	$	(324	)	$	(644	)
Discount rate	15.00		(774		)	(1,516		)	15.00		(1,270		)	(1,870		)

Servicing income amounted to $3 million and $2 million for the three-month periods ending September 30, 2017, and 2016, respectively. For the nine-month periods ended September 30, 2017 and 2016, total servicing income was $8 million and $7 million, respectively. The unpaid principal balance of SBA loans serviced for third parties was $1.3 billion and $1.1 billion at September 30, 2017 and December 31, 2016, respectively.

7. LONG-TERM DEBT

In March 2017, the Bank issued $0.7 billion of senior notes at 99.994% of face value. The senior notes mature on March 10, 2020 and have a fixed coupon rate of 2.375%. The senior notes may be redeemed one month prior to the maturity date at 100% of principal plus accrued and unpaid interest. Also, in March 2017, the Bank issued $0.3 billion of senior notes at 100% of face value. The senior notes mature on March 10, 2020 and have a variable coupon rate of three month LIBOR + 51 basis points.

In August 2017, the Bank issued $0.7 billion of senior notes at 99.762% of face value. The senior notes mature on August 7, 2022 and have a fixed coupon rate of 2.50%. The senior notes may be redeemed one month prior to the maturity date at 100% of principal plus accrued and unpaid interest.

8. OTHER COMPREHENSIVE INCOME

The components of other comprehensive income for the three-month and nine-month periods ended September 30, 2017 and 2016, were as shown in the following table.

	Three Months Ended September 30, 2017
				Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	410		$	(145	)	$	265
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(42,429		)	14,828			(27,601		)
Less: Reclassification adjustment for net losses (gains) included in net income	8,715			(3,082		)	5,633
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(33,304		)	11,601			(21,703		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,885			(660		)	1,225
Less: Reclassification adjustment for net (gains) losses included in net income	144			(51		)	93
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,029			(711		)	1,318
Net change in pension and other post-retirement obligations	1,198			(419		)	779
Total other comprehensive income (loss)	$	(30,077	)	$	10,471		$	(19,606	)

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	Three Months Ended September 30, 2016
	Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	2,002		$	(708	)	$	1,294
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(54,109		)	18,604			(35,505		)
Less: Reclassification adjustment for net losses (gains) included in net income	726			(257		)	469
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(51,381		)	17,639			(33,742		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	(8,171		)	2,860			(5,311		)
Less: Reclassification adjustment for net (gains) losses included in net income	123			(44		)	79
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	(8,048		)	2,816			(5,232		)
Net change in pension and other post-retirement obligations	1,293			(452		)	841
Total other comprehensive income (loss)	$	(58,136	)	$	20,003		$	(38,133	)

	Nine Months Ended September 30, 2017
			Tax (expense)
(dollar amounts in thousands)	Pretax		Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	3,698	$	(1,307	)	$	2,391
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	19,853		(6,779		)	13,074
Less: Reclassification adjustment for net losses (gains) included in net income	18,577		(6,570		)	12,007
Net change in unrealized holding gains (losses) on available-for-sale debt securities	42,128		(14,656		)	27,472
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,274		(446		)	828
Less: Reclassification adjustment for net (gains) losses included in net income	1,131		(396		)	735
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,405		(842		)	1,563
Net change in pension and other post-retirement obligations	3,104		(1,086		)	2,018
Total other comprehensive income (loss)	$	47,637	$	(16,584	)	$	31,053

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	Nine Months Ended September 30, 2016
	Tax (expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	(600	)	$	212		$	(388	)
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	76,637			(28,315		)	48,322
Less: Reclassification adjustment for net losses (gains) included in net income	(2,032		)	718			(1,314		)
Net change in unrealized holding gains (losses) on available-for-sale debt securities	74,005			(27,385		)	46,620
Net change in unrealized holding gains (losses) on available-for-sale equity securities	170			(60		)	110
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	8,047			(2,816		)	5,231
Less: Reclassification adjustment for net (gains) losses included in net income	(769		)	269			(500		)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	7,278			(2,547		)	4,731
Net change in pension and other post-retirement obligations	3,879			(1,357		)	2,522
Total other comprehensive income (loss)	$	85,332		$	(31,349	)	$	53,983

The following table presents activity in accumulated other comprehensive income (loss), net of tax, for the nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Unrealized gains and (losses) on debt securities (1)			Unrealized gains and (losses) on equity securities		Unrealized gains and (losses) on cash flow hedging derivatives			Unrealized gains (losses) for pension and other post- retirement obligations			Total
December 31, 2015	$	8,361		$	176	$	(3,948	)	$	(230,747	)	$	(226,158	)
Other comprehensive income before reclassifications	47,934			110		5,231			—			53,275
Amounts reclassified from accumulated OCI to earnings	(1,314		)	—		(500		)	2,522			708
Period change	46,620			110		4,731			2,522			53,983
September 30, 2016	$	54,981		$	286	$	783		$	(228,225	)	$	(172,175	)
December 31, 2016	$	(192,764	)	$	287	$	(2,634	)	$	(205,905	)	$	(401,016	)
Other comprehensive income before reclassifications	15,465			—		828			—			16,293
Amounts reclassified from accumulated OCI to earnings	12,007			—		735			2,018			14,760
Period change	27,472			—		1,563			2,018			31,053
September 30, 2017	$	(165,292	)	$	287	$	(1,071	)	$	(203,887	)	$	(369,963	)

(1) Amounts at September 30, 2017 and December 31, 2016 include $97 million and $82 million, respectively, of net unrealized gains on securities transferred from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The net unrealized gains will be recognized in earnings over the remaining life of the security using the effective interest method.

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The following table presents the reclassification adjustments out of accumulated OCI included in net income and the impacted line items as listed on the Unaudited Condensed Consolidated Statements of Income for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Three Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(1,498	)	$	(726	)	Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,113		)	—			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(104		)	—			Noninterest income - net gains (losses) on sale of securities
	(8,715		)	(726		)	Total before tax
	3,082			257			Tax (expense) benefit
	$	(5,633	)	$	(469	)	Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(144	)	$	(123	)	Interest income - loans and leases
Interest rate contracts	—			—			Noninterest income - other income
	(144		)	(123		)	Total before tax
	51			44			Tax (expense) benefit
	$	(93	)	$	(79	)	Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(1,690	)	$	(1,785	)	Noninterest expense - personnel costs
Prior service credit	492			492			Noninterest expense - personnel costs
	(1,198		)	(1,293		)	Total before tax
	419			452			Tax (expense) benefit
	$	(779	)	$	(841	)	Net of tax

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	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Nine Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(7,388	)	$	478		Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,502		)	1,630			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(3,687		)	(76		)	Noninterest income - net gains (losses) on sale of securities
	(18,577		)	2,032			Total before tax
	6,570			(718		)	Tax (expense) benefit
	$	(12,007	)	$	1,314		Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(1,131	)	$	770		Interest income - loans and leases
Interest rate contracts	—			(1		)	Noninterest income - other income
	(1,131		)	769			Total before tax
	396			(269		)	Tax (expense) benefit
	$	(735	)	$	500		Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(4,580	)	$	(5,355	)	Noninterest expense - personnel costs
Prior service credit	1,476			1,476			Noninterest expense - personnel costs
	(3,104		)	(3,879		)	Total before tax
	1,086			1,357			Tax (expense) benefit
	$	(2,018	)	$	(2,522	)	Net of tax

9. EARNINGS PER SHARE

Basic earnings per share is the amount of earnings (adjusted for dividends declared on preferred stock) available to each share of common stock outstanding during the reporting period. Diluted earnings per share is the amount of earnings available to each share of common stock outstanding during the reporting period adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include incremental shares issued for stock options, restricted stock units and awards, distributions from deferred compensation plans, and the conversion of the Company’s convertible preferred stock. Potentially dilutive common shares are excluded from the computation of diluted earnings per share during periods in which the effect would be antidilutive. For diluted earnings per share, net income available to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would be dilutive, net income available to common shareholders is adjusted by the associated preferred dividends and deemed dividend.

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The calculation of basic and diluted earnings per share for the three and nine-month periods ended September 30, 2017 and 2016, was as shown in the table.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands, except per share amounts)	2017			2016			2017			2016
Basic earnings per common share:
Net income	$	274,568		$	127,004		$	754,403		$	472,858
Preferred stock dividends	(18,903		)	(18,537		)	(56,670		)	(46,409		)
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Basic earnings per common share	$	0.24		$	0.12		$	0.64		$	0.51
Diluted earnings per common share:
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Effect of assumed preferred stock conversion	—			—			—			—
Net income applicable to diluted earnings per share	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Dilutive potential common shares:
Stock options and restricted stock units and awards	17,079			10,714			17,515			10,295
Shares held in deferred compensation plans	3,228			2,654			3,096			2,337
Other	146			135			152			135
Dilutive potential common shares	20,453			13,503			20,763			12,767
Total diluted average common shares issued and outstanding	1,106,491			952,081			1,107,878			856,934
Diluted earnings per common share	$	0.23		$	0.11		$	0.63		$	0.50

For the three-month periods ended September 30, 2017 and 2016, approximately 1.5 million and 3.5 million, respectively, of options to purchase shares of common stock were not included in the computation of diluted earnings per share because the effect would be antidilutive. For the nine-month periods ended September 30, 2017 and 2016, approximately 0.9 million and 3.3 million, respectively, were not included.

10. BENEFIT PLANS

Huntington sponsors a non-contributory defined benefit pension plan covering substantially all employees hired or rehired prior to January 1, 2010. The plan, which was modified in 2013 and no longer accrues service benefits to participants, provides benefits based upon length of service and compensation levels. The funding policy of Huntington is to contribute an annual amount that is at least equal to the minimum funding requirements but not more than the amount deductible under the Internal Revenue Code. There is no required minimum contribution for 2017.

In addition, Huntington has a defined benefit post-retirement plan that provides certain healthcare and life insurance benefits to retired employees who have attained the age of 55 and have at least 10 years of vesting service under this plan.

As part of the FirstMerit acquisition, Huntington agreed to assume and honor all FirstMerit benefit plans. The FirstMerit Pension Plan was frozen for nonvested employees and closed to new entrants after December 31, 2006. Effective December 31, 2012, the FirstMerit Pension Plan was frozen for vested employees. Additionally, FirstMerit had a post-retirement benefit plan which provided medical and life insurance for retired employees.

For additional information on benefit plans, see the Benefit Plan footnote in our 2016 Form 10-K.

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The following table shows the components of net periodic (benefit) cost for all plans.

	Pension Benefits						Post-Retirement Benefits
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	640		$	1,425		$	22		$	16
Interest cost	7,478			7,978			98			79
Expected return on plan assets	(13,803		)	(12,086		)	—			—
Amortization of prior service cost	—			—			(492		)	(492		)
Amortization of (gain) loss	1,747			1,865			(55		)	(72		)
Settlements	5,049			3,400			—			—
Net periodic (benefit) cost	$	1,111		$	2,582		$	(427	)	$	(469	)

	Pension Benefits						Post-Retirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	1,920		$	3,475		$	65		$	16
Interest cost	22,433			21,474			296			188
Expected return on plan assets	(41,409		)	(32,533		)	—			—
Amortization of prior service cost	—			—			(1,476		)	(1,476		)
Amortization of (gain) loss	5,241			5,594			(164		)	(216		)
Settlements	10,049			10,200			—			—
Net periodic (benefit) cost	$	(1,766	)	$	8,210		$	(1,279	)	$	(1,488	)

Huntington has a defined contribution plan that is available to eligible employees. Huntington matches participant contributions, up to the first 4% of base pay that is contributed to the defined contribution plan. For 2016, a discretionary profit-sharing contribution equal to 1% of eligible participants’ 2016 base pay was awarded during the 2017 first quarter. Huntington's expense related to the defined contribution plans during the third quarter2017 and 2016 was $5 million and $9 million, respectively. For the nine-month periods ended September 30, 2017 and 2016, expense related to the defined contribution plans was $26 million and $26 million, respectively.

11. FAIR VALUES OF ASSETS AND LIABILITIES

See Note 18 “Fair Value of Assets and Liabilities” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for a description of additional 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 three-month and nine-month periods ended September 30, 2017 and 2016.

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Assets and Liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis at September 30, 2017 and December 31, 2016 are summarized in the table below.

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	584,829	$	—	$	—		$	584,829
Loans held for investment	—		58,708		40,483		—			99,191
Trading account securities:
U.S. Treasury securities	25		—		—		—			25
Municipal securities	—		1,481		—		—			1,481
Other securities	86,982		—		—		—			86,982
	87,007		1,481		—		—			88,488
Available-for-sale and other securities:
U.S. Treasury securities	11,260		—		—		—			11,260
Federal agencies: Mortgage-backed	—		10,639,750		—		—			10,639,750
Federal agencies: Other agencies	—		96,451		—		—			96,451
Municipal securities	—		468,082		2,958,027		—			3,426,109
Asset-backed securities	—		531,064		24,127		—			555,191
Corporate debt	—		125,629		—		—			125,629
Other securities	11,717		3,935		—		—			15,652
	22,977		11,864,911		2,982,154		—			14,870,042
MSRs	—		—		11,753		—			11,753
Derivative assets	—		312,401		8,425		(154,562		)	166,264
Liabilities
Derivative liabilities	—		288,191		5,459		(234,526		)	59,124
Short-term borrowings	4		—		—		—			4

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	438,224	$	—	$	—		$	438,224
Loans held for investment	—		34,439		47,880		—			82,319
Trading account securities:
Municipal securities	—		1,148		—		—			1,148
Other securities	132,147		—		—		—			132,147
	132,147		1,148		—		—			133,295
Available-for-sale and other securities:
U.S. Treasury securities	5,497		—		—		—			5,497
Federal agencies: Mortgage-backed	—		10,673,342		—		—			10,673,342
Federal agencies: Other agencies	—		73,542		—		—			73,542
Municipal securities	—		452,013		2,798,044		—			3,250,057
Asset-backed securities	—		717,478		76,003		—			793,481
Corporate debt	—		198,683		—		—			198,683
Other securities	16,588		3,943		—		—			20,531
	22,085		12,119,001		2,874,047		—			15,015,133
MSRs	—		—		13,747		—			13,747
Derivative assets	—		414,412		5,747		(181,940		)	238,219
Liabilities
Derivative liabilities	—		362,777		7,870		(272,361		)	98,286
Short-term borrowings	474		—		—		—			474

(1) Amounts represent the impact of legally enforceable master netting agreements that allow the Company to settle positive and negative positions and cash collateral held or placed with the same counterparties.

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The tables below present a rollforward of the balance sheet amounts for the three-month and nine-month periods ended September 30, 2017 and 2016, for financial instruments measured on a recurring basis and classified as Level 3. The classification of an item as Level 3 is based on the significance of the unobservable inputs to the overall fair value measurement. However, Level 3 measurements may also include observable components of value that can be validated externally. Accordingly, the gains and losses in the table below include changes in fair value due in part to observable factors that are part of the valuation methodology.

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	12,528		$	3,178		$	2,872,007		$	42,575		$	43,855
Transfers out of Level 3 (1)	—			(1,376		)	—			—			—
Total gains/losses for the period:
Included in earnings	(775		)	1,164			(637		)	(1,569		)	187
Included in OCI	—			—			(33,781		)	5,166			—
Purchases/originations	—			—			166,514			—			—
Sales	—			—			(90		)	(21,625		)	—
Repayments	—			—			—			—			(3,559		)
Settlements	—			—			(45,986		)	(420		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(775	)	$	1,164		$	(104	)	$	—		$	—

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,105		$	12,751		$	2,237,975		$	71,379		$	925
Transfers out of Level 3 (1)	—			(1,692		)	—			—			—
Total gains/losses for the period:
Included in earnings	(677		)	(2,459		)	4,166			—			(249		)
Included in OCI	—			—			(28,272		)	2,875			—
Purchases/originations	—			—			953,639			10			56,469
Sales	—			—						—			—
Repayments	—			—			—			—			(3,860		)
Settlements	—			—			(262,235		)	(445		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(677	)	$	(2,459	)	$	—		$	—		$	—

(1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that were transferred to loans held for sale, which are classified as Level 2.

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	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,747		$	(2,123	)	$	2,798,044		$	76,003		$	47,880
Transfers out of Level 3 (1)	—			(3,833		)	—			—			—
Total gains/losses for the period:
Included in earnings	(1,994		)	8,922			(3,612		)	(5,097		)	1,617
Included in OCI	—			—			(887		)	13,936			—
Purchases/originations	—			—			414,123			—			—
Sales	—			—			(90		)	(59,353		)	—
Repayments	—			—			—			—			(9,014		)
Settlements	—			—			(249,551		)	(1,362		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(1,994	)	$	8,922		$	(128	)	$	(3,559	)	$	—

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset- backed securities			Loans held for investment
Opening balance	$	17,585		$	6,056		$	2,095,551		$	100,337		$	1,748
Transfers out of Level 3 (1)	—			(5,115		)	—			—			—
Total gains/losses for the period:
Included in earnings	(5,157		)	7,659			4,166			2			(249		)
Included in OCI	—			—			(8,946		)	3,549			—
Purchases/originations	—			—			1,237,546			10			56,469
Sales	—			—			(36,657		)	(27,794		)	—
Repayments	—			—			—			—			(4,683		)
Settlements	—			—			(386,387		)	(2,285		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(5,157	)	$	7,759		$	—		$	2		$	—

(1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that were transferred to loans held for sale, which are classified as Level 2.

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The tables below summarize the classification of gains and losses due to changes in fair value, recorded in earnings for Level 3 assets and liabilities for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(775	)	$	1,164	$	—		$	—		$	—
Securities gains (losses)	—			—		(104		)	(1,569		)	—
Interest and fee income	—			—		(533		)	—			—
Noninterest income	—			—		—			—			187
Total	$	(775	)	$	1,164	$	(637	)	$	(1,569	)	$	187

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(677	)	$	(2,459	)	$	—	$	—	$	—
Securities gains (losses)	—			—			—		—		—
Interest and fee income	—			—			—		—		—
Noninterest income	—			—			4,166		—		(249		)
Total	$	(677	)	$	(2,459	)	$	4,166	$	—	$	(249	)

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(1,994	)	$	8,922	$	—		$	—		$	—
Securities gains (losses)	—			—		(128		)	(5,100		)	—
Interest and fee income	—			—		(3,484		)	3			—
Noninterest income	—			—		—			—			1,617
Total	$	(1,994	)	$	8,922	$	(3,612	)	$	(5,097	)	$	1,617

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(5,157	)	$	7,659	$	—	$	—	$	—
Securities gains (losses)	—			—		—		—		—
Interest and fee income	—			—		—		—		—
Noninterest income	—			—		4,166		2		(249		)
Total	$	(5,157	)	$	7,659	$	4,166	$	2	$	(249	)

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Assets and liabilities under the fair value option

The following table presents the fair value and aggregate principal balance of certain assets and liabilities under the fair value option.

	September 30, 2017
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	584,829	$	564,106	$	20,723		$	602	$	608	$	(6	)
Loans held for investment	99,191		107,997		(8,806		)	10,086		11,781		(1,695		)

	December 31, 2016
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	438,224	$	433,760	$	4,464		$	—	$	—	$	—
Loans held for investment	82,319		91,998		(9,679		)	8,408		11,082		(2,674		)

The following tables present the net gains (losses) from fair value changes for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Net gains (losses) from fair value changes						Net gains (losses) from fair value changes
	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017		2016
Assets
Loans held for sale	$	(1,897	)	$	(4,439	)	$	11,719	$	9,080
Loans held for investment	187			—			1,617		—

Assets and Liabilities measured at fair value on a nonrecurring basis

Certain assets and liabilities may be required to be measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition. These assets and liabilities are not measured at fair value on an ongoing basis; however, they are subject to fair value adjustments in certain circumstances, such as when there is evidence of impairment. For the nine months ended September 30, 2017, assets measured at fair value on a nonrecurring basis were as shown in the table below.

			Fair Value Measurements Using
(dollar amounts in thousands)	Fair Value		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total Gains/(Losses) Nine Months Ended September 30, 2017
MSRs	$	182,043	$	—	$	—	$	182,043	$	(318	)
Impaired loans	68,159		—		—		68,159		(3,976		)
Other real estate owned	42,041		—		—		42,041		(1,759		)

MSRs accounted for under the amortization method are subject to nonrecurring fair value measurement when the fair value is lower than the carrying amount.

Periodically, Huntington records nonrecurring adjustments of collateral-dependent loans measured for impairment when establishing the ACL. Such amounts are generally based on the fair value of the underlying collateral supporting the loan. Appraisals are generally obtained to support the fair value of the collateral and incorporate measures such as recent sales prices

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for comparable properties and cost of construction. In cases where the carrying value exceeds the fair value of the collateral less cost to sell, an impairment charge is recognized.

Other real estate-owned properties are included in accrued income and other assets and valued based on appraisals and third-party price opinions, less estimated selling costs.

Significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis

The table below presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at September 30, 2017 and December 31, 2016:

	Quantitative Information about Level 3 Fair Value Measurements at September 30, 2017
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	11,753	Discounted cash flow	Constant prepayment rate	9.0% - 31.0% (12%)
				Spread over forward interest rate swap rates	8.0% - 10.0% (8.1%)
Derivative assets	8,425		Consensus Pricing	Net market price	-4.0% - 21.4% (1.8%)
Derivative liabilities	5,459			Estimated Pull through %	11.0% - 99.0% (79.0%)
Municipal securities	2,958,027		Discounted cash flow	Discount rate	0.0% - 10.3% (4.0%)
				Cumulative default	0.0% - 42.0% (4.9%)
				Loss given default	5.0% - 80.0% (23.7%)
Asset-backed securities	24,127		Discounted cash flow	Discount rate	1.3% - 6.8% (6.5%)
				Cumulative prepayment rate	0.0% - 72% (7.3%)
				Cumulative default	2.9% - 100% (8.6%)
				Loss given default	90% - 100% (97.8%)
Loans held for investment	40,483		Discounted cash flow	Discount rate	7.0% - 17.7% (8.2%)
Measured at fair value on a nonrecurring basis:
MSRs	182,043		Discounted cash flow	Constant prepayment rate	6.0% - 21.0% (8%)
				Spread over forward interest rate swap rates	1.8% - 20.0% (10.4%)
Impaired loans	68,159		Appraisal value	NA	NA
Other real estate owned	42,041		Appraisal value	NA	NA

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	Quantitative Information about Level 3 Fair Value Measurements at December 31, 2016
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	13,747	Discounted cash flow	Constant prepayment rate	5.63% - 34.4% (10.9%)
				Spread over forward interest rate swap rates	3.0% - 9.2% (5.4%)
Derivative assets	5,747		Consensus Pricing	Net market price	-7.1% - 25.4% (1.1%)
Derivative liabilities	7,870			Estimated Pull through %	8.1% - 99.8% (76.9%)
Municipal securities	2,798,044		Discounted cash flow	Discount rate	0.0% - 10.0% (3.6%)
				Cumulative default	0.3% - 37.8% (4.0%)
				Loss given default	5.0% - 80.0% (24.1%)
Asset-backed securities	76,003		Discounted cash flow	Discount rate	5.0% - 12.0% (6.3%)
				Cumulative prepayment rate	0.0% - 73% (6.5%)
				Cumulative default	1.1% - 100% (11.2%)
				Loss given default	85% - 100% (96.3%)
				Cure given deferral	0.0% - 75.0% (36.2%)
Loans held for investment	47,880		Discounted cash flow	Discount rate	5.4% - 16.2% (5.6%)
Measured at fair value on a nonrecurring basis:
MSRs	171,309		Discounted cash flow	Constant prepayment rate	5.57% - 30.4% (7.8%)
				Spread over forward interest rate swap rates	4.2% - 20.0% (11.7%)
Impaired loans	53,818		Appraisal value	NA	NA
Other real estate owned	50,930		Appraisal value	NA	NA

The following provides a general description of the impact of a change in an unobservable input on the fair value measurement and the interrelationship between unobservable inputs, where relevant/significant. Interrelationships may also exist between observable and unobservable inputs. Such relationships have not been included in the discussion below.

A significant change in the unobservable inputs may result in a significant change in the ending fair value measurement of Level 3 instruments. In general, prepayment rates increase when market interest rates decline and decrease when market interest rates rise and higher prepayment rates generally result in lower fair values for MSR assets and Asset-backed securities.

Credit loss estimates, such as probability of default, constant default, cumulative default, loss given default, cure given deferral, and loss severity, are driven by the ability of the borrowers to pay their loans and the value of the underlying collateral and are impacted by changes in macroeconomic conditions, typically increasing when economic conditions worsen and decreasing when conditions improve. An increase in the estimated prepayment rate typically results in a decrease in estimated credit losses and vice versa. Higher credit loss estimates generally result in lower fair values. Credit spreads generally increase when liquidity risks and market volatility increase and decrease when liquidity conditions and market volatility improve.

Discount rates and spread over forward interest rate swap rates typically increase when market interest rates increase and/or credit and liquidity risks increase and decrease when market interest rates decline and/or credit and liquidity conditions improve. Higher discount rates and credit spreads generally result in lower fair market values.

Net market price and pull through percentages generally increase when market interest rates increase and decline when market interest rates decline. Higher net market price and pull through percentages generally result in higher fair values.

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Fair values of financial instruments

The following table provides the carrying amounts and estimated fair values of Huntington’s financial instruments that are carried either at fair value or cost at September 30, 2017 and December 31, 2016:

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and short-term assets	$	1,243,828	$	1,243,828	$	1,443,037	$	1,443,037
Trading account securities	88,488		88,488		133,295		133,295
Loans held for sale	651,734		657,270		512,951		515,640
Available-for-sale and other securities	15,453,061		15,453,061		15,562,837		15,562,837
Held-to-maturity securities	8,688,399		8,655,805		7,806,939		7,787,268
Net loans and direct financing leases	67,911,810		67,698,855		66,323,583		66,294,639
Derivatives	166,264		166,264		238,219		238,219
Financial Liabilities
Deposits	78,445,113		78,422,971		75,607,717		76,161,091
Short-term borrowings	1,829,549		1,829,549		3,692,654		3,692,654
Long-term debt	9,200,707		9,402,926		8,309,159		8,387,444
Derivatives	59,124		59,124		98,286		98,286

The following table presents the level in the fair value hierarchy for the estimated fair values of only Huntington’s financial instruments that are not already on the Unaudited Condensed Consolidated Balance Sheets at fair value at September 30, 2017 and December 31, 2016:

	Estimated Fair Value Measurements at Reporting Date Using						September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	8,655,805	$	—	$	8,655,805
Net loans and direct financing leases	—		—		67,698,855		67,698,855
Financial Liabilities
Deposits	—		75,230,127		3,192,844		78,422,971
Short-term borrowings	4		—		1,829,545		1,829,549
Long-term debt	—		8,992,820		410,106		9,402,926

	Estimated Fair Value Measurements at Reporting Date Using						December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	7,787,268	$	—	$	7,787,268
Net loans and direct financing leases	—		—		66,294,639		66,294,639
Financial Liabilities
Deposits	—		72,319,328		3,841,763		76,161,091
Short-term borrowings	474		—		3,692,180		3,692,654
Long-term debt	—		7,980,176		407,268		8,387,444

The short-term nature of certain assets and liabilities result in their carrying value approximating fair value. These include trading account securities, customers’ acceptance liabilities, short-term borrowings, bank acceptances outstanding, FHLB advances, and cash and short-term assets, which include cash and due from banks, interest-bearing deposits in banks, and federal funds sold and securities purchased under resale agreements. Loan commitments and letters-of-credit generally have short-term, variable-rate features and contain clauses that limit Huntington’s exposure to changes in customer credit quality.

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Accordingly, their carrying values, which are immaterial at the respective balance sheet dates, are reasonable estimates of fair value.

Certain assets, the most significant being operating lease assets, bank owned life insurance, and premises and equipment, do not meet the definition of a financial instrument and are excluded from this disclosure. Similarly, mortgage and nonmortgage servicing rights, deposit base, and other customer relationship intangibles are not considered financial instruments and are not included above. Accordingly, this fair value information is not intended to, and does not, represent Huntington’s underlying value. Many of the assets and liabilities subject to the disclosure requirements are not actively traded, requiring fair values to be estimated by Management. These estimations necessarily involve the use of judgment about a wide variety of factors, including but not limited to, relevancy of market prices of comparable instruments, expected future cash flows, and appropriate discount rates.

The following methods and assumptions were used by Huntington to estimate the fair value of the remaining classes of financial instruments:

Held-to-maturity securities

Fair values are determined by using models that are based on security-specific details, as well as relevant industry and economic factors. The most significant of these inputs are quoted market prices, and interest rate spreads on relevant benchmark securities.

Loans and Direct Financing Leases

Variable-rate loans that reprice frequently are based on carrying amounts, as adjusted for estimated credit losses. The fair values for other loans and leases are estimated using discounted cash flow analyses and employ interest rates currently being offered for loans and leases with similar terms. The rates take into account the position of the yield curve, as well as an adjustment for prepayment risk, operating costs, and profit. This value is also reduced by an estimate of expected losses and the credit risk associated in the loan and lease portfolio. The valuation of the loan portfolio reflected discounts that Huntington believed are consistent with transactions occurring in the marketplace.

Deposits

Demand deposits, savings accounts, and money market deposits are, by definition, equal to the amount payable on demand. The fair values of fixed-rate time deposits are estimated by discounting cash flows using interest rates currently being offered on certificates with similar maturities.

Debt

Long-term debt is based upon quoted market prices, which are inclusive of Huntington’s credit risk. In the absence of quoted market prices, discounted cash flows using market rates for similar debt with the same maturities are used in the determination of fair value.

12. DERIVATIVE FINANCIAL INSTRUMENTS

Derivative financial instruments are recorded in the Unaudited Condensed Consolidated Balance Sheets as either an asset or a liability (in accrued income and other assets or accrued expenses and other liabilities, respectively) and measured at fair value.

The following table presents the fair values of all derivative instruments included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016. Amounts in the table below are presented gross without the impact of any net collateral arrangements.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Derivatives designated as Hedging Instruments
Interest rate contracts	$	32,837	$	93,224	$	46,440	$	99,996
Derivatives not designated as Hedging Instruments
Interest rate contracts (1)	198,471		112,534		232,653		140,475
Foreign exchange contracts	22,354		21,020		23,265		19,576
Commodities contracts	66,133		61,695		108,026		104,328
Equity contracts	1,031		5,177		9,775		6,272
Total Contracts	$	320,826	$	293,650	$	420,159	$	370,647

(1) Includes derivative assets and liabilities used in mortgage banking activities.

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Derivatives used in asset and liability management activities

Huntington engages in balance sheet hedging activity, principally for asset and liability management purposes, to convert fixed rate assets or liabilities into floating rate, or vice versa. Balance sheet hedging activity is arranged to receive hedge accounting treatment and is classified as either fair value or cash flow hedges. Fair value hedges are purchased to convert subordinated and other long-term debt from fixed-rate obligations to floating rate. Cash flow hedges are also used to convert floating rate loans into fixed rate loans.

The following table presents the gross notional values of derivatives used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016, identified by the underlying interest rate-sensitive instruments.

	September 30, 2017
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	1,325,000	$	1,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	7,425,000		—		7,425,000
Total notional value at September 30, 2017	$	8,375,000	$	1,325,000	$	9,700,000
	December 31, 2016
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	3,325,000	$	3,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	6,525,000		—		6,525,000
Total notional value at December 31, 2016	$	7,475,000	$	3,325,000	$	10,800,000

The following table presents additional information about the interest rate swaps used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016.

	September 30, 2017
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	1,325,000	0.1	$	(1,239	)	0.72	%	1.23	%
Liability conversion swaps
Receive fixed—generic	8,375,000		2.8	(59,148		)	1.56		1.29
Total swap portfolio at September 30, 2017	$	9,700,000	2.3	$	(60,387	)
	December 31, 2016
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	3,325,000	0.6	$	(2,060	)	1.04	%	0.91	%
Liability conversion swaps
Receive fixed—generic	7,475,000		3.1	(51,496		)	1.49		0.88
Total swap portfolio at December 31, 2016	$	10,800,000	2.3	$	(53,556	)

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These derivative financial instruments are entered into to manage the interest rate risk of assets and liabilities. Consequently, net amounts receivable or payable on contracts hedging either interest-earning assets or interest-bearing liabilities are an adjustment to either interest income or interest expense. The net amounts resulted in an increase to net interest income of $3 million and $18 million for the three-month periods ended September 30, 2017, and 2016, respectively. For the nine-month periods ended September 30, 2017, and 2016, the net amounts resulted in an increase to net interest income of $20 million and $58 million, respectively.

Fair Value Hedges

The changes in fair value of the fair value hedges are, to the extent that the hedging relationship is effective, recorded through earnings and offset against changes in the fair value of the hedged item.

The following table presents the change in fair value for derivatives designated as fair value hedges as well as the offsetting change in fair value on the hedged item for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Interest rate contracts
Change in fair value of interest rate swaps hedging deposits (1)	$	—		$	—		$	—		$	(82	)
Change in fair value of hedged deposits (1)	—			—			—			72
Change in fair value of interest rate swaps hedging subordinated notes (2)	(2,234		)	(9,688		)	(4,665		)	(2,880		)
Change in fair value of hedged subordinated notes (2)	3,615			10,400			6,782			3,591
Change in fair value of interest rate swaps hedging other long-term debt (2)	(6,431		)	(45,870		)	(880		)	37,179
Change in fair value of hedged other long-term debt (2)	7,152			42,647			(1,226		)	(38,187		)

(1) Effective portion of the hedging relationship is recognized in Interest expense—deposits in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

(2) Effective portion of the hedging relationship is recognized in Interest expense—subordinated notes and other long-term debt in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

Cash Flow Hedges

To the extent derivatives designated as cash flow hedges are effective in offsetting the variability of the hedged cash flows, changes in the derivatives’ fair value will not be included in current earnings but are reported as a component of OCI in the Unaudited Condensed Consolidated Statements of Changes in Shareholders’ Equity. These changes in fair value will be included in earnings of future periods when earnings are also affected by the changes in the hedged cash flows. To the extent these derivatives are not effective, changes in their fair values are immediately included in noninterest income.

The following table presents the gains and (losses) recognized in OCI and the location in the Unaudited Condensed Consolidated Statements of Income of gains and (losses) reclassified from OCI into earnings for derivatives designated as effective cash flow hedges for the three-month and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)					Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017		2016				2017		2016
Interest rate contracts
Loans	$	1,225	$	(5,311	)	Interest and fee income - loans and leases	$	144	$	123
Investment Securities	—		—			Noninterest income - other income	—		—
Total	$	1,225	$	(5,311	)		$	144	$	123

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Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)				Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Nine Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	828	$	5,231	Interest and fee income - loans and leases	$	1,131	$	(770	)
Investment Securities	—		—		Noninterest income - other income	—		1
	$	828	$	5,231		$	1,131	$	(769	)

Gains and losses on swaps related to loans and investment securities are recorded in interest income and interest expense, respectively. During the next twelve months, Huntington expects to reclassify to earnings approximately $(1) million after-tax of unrealized gains (losses) on cash flow hedging derivatives currently in OCI.

The following table presents the gains and (losses) recognized in noninterest income for the ineffective portion of interest rate contracts for derivatives designated as cash flow hedges for the three and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Three Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	359	$	(371	)	$	225	$	6

Derivatives used in mortgage banking activities

Mortgage loan origination hedging activity

Huntington’s mortgage origination hedging activity is related to the hedging of the mortgage pricing commitments to customers and the secondary sale to third parties. The value of a newly originated mortgage is not firm until the interest rate is committed or locked. The interest rate lock commitments are derivative positions offset by forward commitments to sell loans.

Huntington uses two types of mortgage-backed securities in its forward commitments to sell loans. The first type of forward commitment is a “To Be Announced” (or TBA), the second is a “Specified Pool” mortgage-backed security. Huntington uses these derivatives to hedge the value of mortgage-backed securities until they are sold.

The following table summarizes the derivative assets and liabilities used in mortgage banking activities:

Derivatives used in mortgage banking activities	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Interest rate lock agreements	$	8,425	$	282	$	5,747	$	1,598
Forward trades and options	1,562		1,782		13,319		1,173
Total derivatives used in mortgage banking activities	$	9,987	$	2,064	$	19,066	$	2,771

MSR hedging activity

Huntington’s MSR economic hedging activity uses securities and derivatives to manage the value of the MSR asset and to mitigate the various types of risk inherent in the MSR asset, including risks related to duration, basis, convexity, volatility, and yield curve. The hedging instruments include forward commitments, interest rate swaps, and options on interest rate swaps.

The total notional value of these derivative financial instruments at September 30, 2017 and December 31, 2016, was $188 million and $300 million, respectively. The total notional amount at September 30, 2017 corresponds to trading assets with a fair value of $1 million and trading liabilities with a fair value of $2 million. Net trading gains and (losses) related to MSR hedging for the three-month periods ended September 30, 2017 and 2016, were less than $1 million and $(1) million and $1 million and $17 million for the nine-month periods ended September 30, 2017 and 2016, respectively. These amounts are included in mortgage banking income in the Unaudited Condensed Consolidated Statements of Income.

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Derivatives used in customer related activities

Various derivative financial instruments are offered to enable customers to meet their financing and investing objectives and for their risk management purposes. Derivative financial instruments used in trading activities consist of commodity, interest rate, and foreign exchange contracts. Huntington may enter into offsetting third-party contracts with approved, reputable counterparties with substantially matching terms and currencies in order to economically hedge significant exposure related to derivatives used in trading activities.

The interest rate risk of customer derivatives is mitigated by entering into similar derivatives having offsetting terms with other counterparties. The credit risk to these customers is evaluated and included in the calculation of fair value. Foreign currency derivatives help the customer hedge risk and reduce exposure to fluctuations in exchange rates. Transactions are primarily in liquid currencies with Canadian dollars and Euros comprising a majority of all transactions. Commodity derivatives help the customer hedge risk and reduce exposure to fluctuations in the price of various commodities. Hedging of energy-related products and base metals comprise the majority of all transactions.

The net fair values of these derivative financial instruments, for which the gross amounts are included in accrued income and other assets or accrued expenses and other liabilities at both September 30, 2017 and December 31, 2016, were $84 million and $80 million, respectively. The total notional values of derivative financial instruments used by Huntington on behalf of customers, including offsetting derivatives, were $21.4 billion and $20.6 billion at both September 30, 2017 and December 31, 2016, respectively. Huntington’s credit risk from interest rate swaps used for trading purposes was $156 million and $196 million at the same dates, respectively.

Share Swap Economic Hedge

Huntington acquires and holds shares of Huntington common stock in a Rabbi Trust for the Executive Deferred Compensation Plan. Huntington common stock held in the Rabbi Trust is recorded at cost and the corresponding deferred compensation liability is recorded at fair value using Huntington's share price as a significant input.

During the second quarter of 2017, Huntington entered into an economic hedge with a notional value of $8 million to hedge deferred compensation expense related to the Executive Deferred Compensation Plan. During the third quarter 2017, the previous economic hedge entered into during the second quarter of 2016 of $20 million expired. Also during the third quarter of 2017, Huntington entered into an economic hedge with notional value of $31 million for a total of $39 million at September 30, 2017 to hedge deferred compensation expense related to the Executive Deferred Compensation Plan. The economic hedges are recorded at fair value in other assets or liabilities. Changes in the fair value are recorded directly through other noninterest expense in the Unaudited Condensed Consolidated Statements of Income. At September 30, 2017, the fair value of the share swaps was $1 million.

Visa^®-related Swap

In connection with the sale of Huntington’s Class B Visa^® shares, Huntington entered into a swap agreement with the purchaser of the shares. The swap agreement adjusts for dilution in the conversion ratio of Class B shares resulting from the Visa^® litigation. In connection with the FirstMerit acquisition, Huntington acquired an additional Visa^® related swap agreement. At September 30, 2017, the combined fair value of the swap liabilities of $5 million is an estimate of the exposure liability based upon Huntington’s assessment of the potential Visa^® litigation losses and timing of the litigation settlement.

Financial assets and liabilities that are offset in the Unaudited Condensed Consolidated Balance Sheets

Huntington records derivatives at fair value as further described in Note 11.

Derivative balances are presented on a net basis taking into consideration the effects of legally enforceable master netting agreements. Additionally, collateral exchanged with counterparties is also netted against the applicable derivative fair values. Huntington enters into derivative transactions with two primary groups: broker-dealers and banks, and Huntington’s customers. Different methods are utilized for managing counterparty credit exposure and credit risk for each of these groups.

Huntington enters into transactions with broker-dealers and banks for various risk management purposes. These types of transactions generally are high-dollar volume. Huntington enters into bilateral collateral and master netting agreements with these counterparties, and routinely exchanges cash and high quality securities collateral. Huntington enters into transactions with customers to meet their financing, investing, payment and risk management needs. These types of transactions generally are low-dollar volume. Huntington enters into master netting agreements with customer counterparties; however, collateral is generally not exchanged.

At September 30, 2017 and December 31, 2016, aggregate credit risk associated with these derivatives, net of collateral that has been pledged by the counterparty, was $30 million and $26 million, respectively. The credit risk associated with interest rate swaps is calculated after considering master netting agreements with broker-dealers and banks.

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At September 30, 2017, Huntington pledged $144 million of investment securities and cash collateral to counterparties, while other counterparties pledged $78 million of investment securities and cash collateral to Huntington to satisfy collateral netting agreements. In the event of credit downgrades, Huntington would not be required to provide additional collateral.

The following tables present the gross amounts of these assets and liabilities with any offsets to arrive at the net amounts recognized in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

Offsetting of Financial Liabilities and Derivative Assets
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of assets presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized assets							Financial instruments			Cash collateral received			Net amount
September 30, 2017	Derivatives	$	320,826	$	(154,562	)	$	166,264	$	(23,350	)	$	(16,895	)	$	126,019
December 31, 2016	Derivatives	420,159		(181,940		)	238,219		(34,328		)	(5,428		)	198,463

Offsetting of Financial Liabilities and Derivative Liabilities
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of liabilities presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized liabilities							Financial instruments			Cash collateral delivered			Net amount
September 30, 2017	Derivatives	$	293,650	$	(234,526	)	$	59,124	$	—		$	(26,766	)	$	32,358
December 31, 2016	Derivatives	370,647		(272,361		)	98,286		(7,550		)	(23,943		)	66,793

13. VIEs

Consolidated VIEs

Consolidated VIEs at September 30, 2017, consisted of certain loan and lease securitization trusts. Huntington has determined that the trusts are VIEs. Huntington has concluded that it is the primary beneficiary of these trusts because it has the power to direct the activities of the entity that most significantly affect the entity’s economic performance and it has either the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE.

The following tables present the carrying amount and classification of the consolidated trusts’ assets and liabilities that were included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,569	$	—	$	1,569
Net loans and leases	33,148		—		33,148
Accrued income and other assets	—		269		269
Total assets	$	34,717	$	269	$	34,986
Liabilities:
Other long-term debt	$	28,120	$	—	$	28,120
Accrued interest and other liabilities	—		269		269
Total liabilities	28,120		269		28,389
Equity:
Beneficial Interest owned by third party	6,597		—		6,597
Total liabilities and equity	$	34,717	$	269	$	34,986

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	December 31, 2016
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,564	$	—	$	1,564
Net loans and leases	69,825		—		69,825
Accrued income and other assets	—		281		281
Total assets	$	71,389	$	281	$	71,670
Liabilities:
Other long-term debt	$	57,494	$	—	$	57,494
Accrued interest and other liabilities	—		281		281
Total liabilities	57,494		281		57,775
Equity:
Beneficial Interest owned by third party	13,895		—		13,895
Total liabilities and equity	$	71,389	$	281	$	71,670

The loans and leases were designated to repay the securitized notes. Huntington services the loans and leases and uses the proceeds from principal and interest payments to pay the securitized notes during the amortization period. Huntington has not provided financial or other support that was not previously contractually required.

Unconsolidated VIEs

The following tables provide a summary of the assets and liabilities included in Huntington’s Unaudited Condensed Consolidated Financial Statements, as well as the maximum exposure to losses, associated with its interests related to unconsolidated VIEs for which Huntington holds an interest, but is not the primary beneficiary to the VIE at September 30, 2017, and December 31, 2016.

	September 30, 2017
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	8,674	$	—	$	8,674
2015-1 Automobile Trust	1,506		—		1,506
Trust Preferred Securities	13,919		252,577		—
Low Income Housing Tax Credit Partnerships	638,171		348,733		638,171
Other Investments	108,556		48,339		108,556
Total	$	770,826	$	649,649	$	756,907

	December 31, 2016
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	14,770	$	—	$	14,770
2015-1 Automobile Trust	2,227		—		2,227
Trust Preferred Securities	13,919		252,552		—
Low Income Housing Tax Credit Partnerships	576,880		292,721		576,880
Other Investments	79,195		42,316		79,195
Total	$	686,991	$	587,589	$	673,072

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The following table provides a summary of automobile transfers to trusts in separate securitization transactions.

(dollar amounts in millions)	Year	Amount Transferred
2016-1 Automobile Trust	2016	$	1,500
2015-1 Automobile Trust	2015	750

The securitizations and the resulting sale of all underlying securities qualified for sale accounting. Huntington has concluded that it is not the primary beneficiary of these trusts because it has neither the obligation to absorb losses of the entities that could potentially be significant to the VIEs nor the right to receive benefits from the entities that could potentially be significant to the VIEs. Huntington is not required and does not currently intend to provide any additional financial support to the trusts. Investors and creditors only have recourse to the assets held by the trusts. The interest Huntington holds in the VIEs relates to servicing rights which are included in servicing rights of Huntington’s Unaudited Consolidated Balance Sheets. The maximum exposure to loss is equal to the carrying value of the servicing asset. See Note 6 for more information.

Trust Preferred Securities

Huntington has certain wholly-owned trusts whose assets, liabilities, equity, income, and expenses are not included in Huntington’s Unaudited Condensed Consolidated Financial Statements. These trusts have been formed for the sole purpose of issuing trust-preferred securities, from which the proceeds are then invested in Huntington junior subordinated debentures, which are reflected in Huntington’s Unaudited Condensed Consolidated Balance Sheets as subordinated notes. The trust securities are the obligations of the trusts, and as such, are not consolidated in Huntington’s Unaudited Condensed Consolidated Financial Statements. A list of trust preferred securities outstanding at September 30, 2017 follows.

(dollar amounts in thousands)	Rate			Principal amount of subordinated note/ debenture issued to trust (1)		Investment in unconsolidated subsidiary
Huntington Capital I	2.01	%	(2)	$	69,730	$	6,186
Huntington Capital II	1.95		(3)	32,093		3,093
Sky Financial Capital Trust III	2.74		(4)	72,165		2,165
Sky Financial Capital Trust IV	2.70		(4)	74,320		2,320
Camco Financial Trust	3.76		(5)	4,269		155
Total				$	252,577	$	13,919

(1) Represents the principal amount of debentures issued to each trust, including unamortized original issue discount.

(2) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.70%.

(3) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.625%.

(4) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.40%.

(5) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.33%.

Each issue of the junior subordinated debentures has an interest rate equal to the corresponding trust securities distribution rate. Huntington has the right to defer payment of interest on the debentures at any time, or from time-to-time for a period not exceeding five years provided that no extension period may extend beyond the stated maturity of the related debentures. During any such extension period, distributions to the trust securities will also be deferred and Huntington’s ability to pay dividends on its common stock will be restricted. Periodic cash payments and payments upon liquidation or redemption with respect to trust securities are guaranteed by Huntington to the extent of funds held by the trusts. The guarantee ranks subordinate and junior in right of payment to all indebtedness of the Company to the same extent as the junior subordinated debt. The guarantee does not place a limitation on the amount of additional indebtedness that may be incurred by Huntington.

Low Income Housing Tax Credit Partnerships

Huntington makes certain equity investments in various limited partnerships that sponsor affordable housing projects utilizing the Low Income Housing Tax Credit (LIHTC) pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital, to facilitate the sale of additional affordable housing product offerings, and to assist in achieving goals associated with the Community Reinvestment Act. The primary activities of the limited partnerships include the identification, development, and operation of multi-family housing that is leased to qualifying residential tenants. Generally, these types of investments are funded through a combination of debt and equity.

Huntington uses the proportional amortization method to account for all qualified investments in these entities. These investments are included in accrued income and other assets. Investments that do not meet the requirements of the proportional

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amortization method are recognized using the equity method. Investment gains/losses related to these investments are included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

The following table presents the balances of Huntington’s affordable housing tax credit investments and related unfunded commitments at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Affordable housing tax credit investments	$	980,984		$	877,237
Less: amortization	(342,813		)	(300,357		)
Net affordable housing tax credit investments	$	638,171		$	576,880
Unfunded commitments	$	348,733		$	292,721

The following table presents other information related to Huntington’s affordable housing tax credit investments for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Tax credits and other tax benefits recognized	$	22,471	$	21,200	$	68,426	$	57,634
Proportional amortization method
Tax credit amortization expense included in provision for income taxes	17,292		13,608		51,474		38,513
Equity method
Tax credit investment (gains) losses included in noninterest income	—		132		—		396

Huntington recognized immaterial impairment losses on tax credit investments during the three-month and nine-month periods ended September 30, 2017 and 2016. The impairment losses recognized related to the fair value of the tax credit investments that were less than carrying value.

Other Investments

Other investments determined to be VIEs include investments in New Market Tax Credit Investments, Historic Tax Credit Investments, Small Business Investment Companies, Rural Business Investment Companies, certain equity method investments and other miscellaneous investments.

14. COMMITMENTS AND CONTINGENT LIABILITIES

Commitments to extend credit

In the ordinary course of business, Huntington makes various commitments to extend credit that are not reflected in the Unaudited Condensed Consolidated Financial Statements. The contract amounts of these financial agreements at September 30, 2017 and December 31, 2016, were as listed in the following table.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Contract amount representing credit risk:
Commitments to extend credit
Commercial	$	16,056,609	$	15,190,056
Consumer	12,977,175		12,235,943
Commercial real estate	1,373,127		1,697,671
Standby letters-of-credit	547,689		637,182
Commercial letters-of-credit	16,815		4,610

Commitments to extend credit generally have fixed expiration dates, are variable-rate, and contain clauses that permit Huntington to terminate or otherwise renegotiate the contracts in the event of a significant deterioration in the customer’s credit quality. These arrangements normally require the payment of a fee by the customer, the pricing of which is based on prevailing market conditions, credit quality, probability of funding, and other relevant factors. Since many of these commitments are expected to expire without being drawn upon, the contract amounts are not necessarily indicative of future cash requirements.

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The interest rate risk arising from these financial instruments is insignificant as a result of their predominantly short-term, variable-rate nature.

Standby letters-of-credit are conditional commitments issued to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Most of these arrangements mature within two years. The carrying amount of deferred revenue associated with these guarantees was $5 million and $8 million at September 30, 2017 and December 31, 2016, respectively.

Commercial letters-of-credit represent short-term, self-liquidating instruments that facilitate customer trade transactions and generally have maturities of no longer than 90 days. The goods or cargo being traded normally secures these instruments.

Commitments to sell loans

Activity related to our mortgage origination activity supports the hedging of the mortgage pricing commitments to customers and the secondary sale to third parties. At September 30, 2017 and December 31, 2016, Huntington had commitments to sell residential real estate loans of $1.0 billion and $0.8 billion, respectively. These contracts mature in less than one year.

Litigation

The nature of Huntington’s business ordinarily results in a certain amount of pending as well as threatened claims, litigation, investigations, regulatory and legal and administrative cases, matters and proceedings, all of which are considered incidental to the normal conduct of business. When the Company determines it has meritorious defenses to the claims asserted, it vigorously defends itself. The Company considers settlement of cases when, in Management’s judgment, it is in the best interests of both the Company and its shareholders to do so.

On at least a quarterly basis, Huntington assesses its liabilities and contingencies in connection with threatened and outstanding legal cases, matters and proceedings, utilizing the latest information available. For cases, matters and proceedings where it is both probable the Company will incur a loss and the amount can be reasonably estimated, Huntington establishes an accrual for the loss. Once established, the accrual is adjusted as appropriate to reflect any relevant developments. For cases, matters or proceedings where a loss is not probable or the amount of the loss cannot be estimated, no accrual is established.

In certain cases, matters and proceedings, exposure to loss exists in excess of the accrual to the extent such loss is reasonably possible, but not probable. Management believes an estimate of the aggregate range of reasonably possible losses, in excess of amounts accrued, for current legal proceedings is up to $65 million at September 30, 2017. For certain other cases, and matters, Management cannot reasonably estimate the possible loss at this time. Any estimate involves significant judgment, given the varying stages of the proceedings (including the fact that many of them are currently in preliminary stages), the existence of multiple defendants in several of the current proceedings whose share of liability has yet to be determined, the numerous unresolved issues in many of the proceedings, and the inherent uncertainty of the various potential outcomes of such proceedings. Accordingly, Management’s estimate will change from time-to-time, and actual losses may be more or less than the current estimate.

While the final outcome of legal cases, matters, and proceedings is inherently uncertain, based on information currently available, advice of counsel, and available insurance coverage, Management believes that the amount it has already accrued is adequate and any incremental liability arising from the Company’s legal cases, matters, or proceedings will not have a material negative adverse effect on the Company’s consolidated financial position as a whole. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these cases, matters, and proceedings, if unfavorable, may be material to the Company’s consolidated financial position in a particular period.

Meoli v. The Huntington National Bank (Cyberco Litigation). The Bank has been named a defendant in a lawsuit arising from the Bank’s commercial lending, depository, and equipment leasing relationships with Cyberco Holdings, Inc. (Cyberco), Cyberco allegedly defrauded equipment lessors and financial institutions, including Huntington, in financing the purchase of computer equipment from Teleservices Group, Inc. (Teleservices), which itself later proved to be a shell corporation. Bankruptcy proceedings for both Cyberco and Teleservices ensued.

In an adversary proceeding brought by the bankruptcy trustee for Teleservices in the U.S. District Court for the Western District of Michigan, judgment was rendered against Huntington in the amount of $72 million plus costs and pre- and post-judgment interest. Huntington appealed the judgment to the U.S. Sixth Circuit Court of Appeals, which reversed the judgment in part and remanded the case for further proceedings. The case is currently before the bankruptcy court again. The parties have completed briefing on liability and the appropriate calculation of damages, and await the scheduling of a hearing on the issue.

Powell v. Huntington National Bank.  Huntington is a defendant in a class action filed on October 15, 2013 alleging Huntington charged late fees on mortgage loans in a method that violated West Virginia law and the loan documents. Plaintiffs seek statutory civil penalties, compensatory damages and attorney’s fees. Huntington filed a motion for summary judgment on

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the plaintiffs’ claims, which was granted by the U.S. District Court on December 28, 2016.  Plaintiffs have appealed to the U.S. Fourth Circuit Court of Appeals. Oral arguments were held on October 24, 2017.

FirstMerit Overdraft Litigation. Commencing in December 2010, two separate lawsuits were filed in the Summit County Court of Common Pleas and the Lake County Court of Common Pleas against FirstMerit. The complaints were brought as class actions on behalf of Ohio residents who maintained a checking account at FirstMerit and who incurred one or more overdraft fees as a result of the alleged re-sequencing of debit transactions. The parties have reached a global settlement for approximately $9 million cash to a common fund plus an additional $7 million in debt forgiveness. Attorneys' fees will be paid from the fund, with any remaining funds going to charity. FirstMerit’s insurer has reimbursed Huntington 49% of the approximately $9 million, which totals approximately $4.4 million. The court preliminarily approved the settlement on December 5, 2016 and the cash portion of the settlement was funded on December 12, 2016. The settlement received final approval on June 2, 2017 and there has been no appeal, so the settlement is final. Huntington is in the process of issuing settlement checks, forgiving the agreed-upon debt, and taking other actions as agreed upon in the settlement agreement. Because the settlement is in the process of being concluded, we anticipate no further reporting on this matter.

15. SEGMENT REPORTING

Our business segments are based on our internally-aligned segment leadership structure, which is how we monitor results and assess performance. We have four major business segments: Consumer and Business Banking, Commercial Banking, Commercial Real Estate and Vehicle Finance(CREVF), Regional Banking and The Huntington Private Client Group(RBHPCG). The Treasury / Other function includes our technology and operations, other unallocated assets, liabilities, revenue, and expense.

Business segment results are determined based upon our management reporting system, which assigns balance sheet and income statement items to each of the business segments. The process is designed around our organizational and management structure and, accordingly, the results derived are not necessarily comparable with similar information published by other financial institutions. Additionally, because of the interrelationships of the various segments, the information presented is not indicative of how the segments would perform if they operated as independent entities.

Revenue is recorded in the business segment responsible for the related product or service. Fee sharing is recorded to allocate portions of such revenue to other business segments involved in selling to, or providing service to customers. Results of operations for the business segments reflect these fee-sharing allocations.

The management accounting process that develops the business segment reporting utilizes various estimates and allocation methodologies to measure the performance of the business segments. Expenses are allocated to business segments using a two-phase approach. The first phase consists of measuring and assigning unit (activity-based) costs to activities related to product origination and servicing. These activity-based costs are then extended, based on volumes, with the resulting amount allocated to business segments that own the related products. The second phase consists of the allocation of overhead costs to all four business segments from Treasury / Other. We utilize a full-allocation methodology, where all Treasury / Other expenses, except reported Significant Items, and a small amount of other residual unallocated expenses, are allocated to the four business segments.

The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP. As a result, reported segment results are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures result in changes in reported segment
financial data. Accordingly, certain amounts have been reclassified to conform to the current period presentation.

We use an active and centralized Funds Transfer Pricing (FTP) methodology to attribute appropriate income to the business segments. The intent of the FTP methodology is to transfer interest rate risk from the business segments by providing matched duration funding of assets and liabilities. The result centralizes the financial impact, management, and reporting of interest rate risk in the Treasury / Other function where it can be centrally monitored and managed. The Treasury / Other function charges (credits) an internal cost of funds for assets held in (or pays for funding provided by) each business segment. The FTP rate is based on prevailing market interest rates for comparable duration assets (or liabilities).

We announced a change in our executive leadership team, which became effective during the second quarter of 2017. As a result, the previously-reported Home Lending segment is now included as an operating unit in the Consumer and Business Banking segment. Additionally, the Insurance operating unit previously included in Commercial Banking was realigned to RBHPCG during second quarter. Prior period results have been reclassified to conform to the current period presentation.

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Consumer and Business Banking - The Consumer and Business Banking segment, including Home Lending, provides a wide array of financial products and services to consumer and small business customers including but not limited to checking accounts, savings accounts, money market accounts, certificates of deposit, mortgage loans, consumer loans, credit cards, and small business loans and investment products. Other financial services available to consumer and small business customers include insurance, interest rate risk protection, foreign exchange, and treasury management. Business Banking is defined as serving companies with revenues up to $20 million and consists of approximately 254,000 businesses. Home Lending supports origination and servicing of consumer loans and mortgages for customers who are generally located in our primary banking markets across all segments.

Commercial Banking - Through a relationship banking model, this segment provides a wide array of products and services to the middle market, large corporate, and government public sector customers located primarily within our geographic footprint. The segment is divided into six business units: Middle Market, Large Corporate, Specialty Banking, Asset Finance, Capital Markets and Treasury Management.

Commercial Real Estate and Vehicle Finance - This segment provides lending and other banking products and services to customers outside of our traditional retail and commercial banking segments. Our products and services include providing financing for the purchase of automobiles, light-duty trucks, recreational vehicles and marine craft at franchised dealerships, financing the acquisition of new and used vehicle inventory of franchised automotive dealerships, and financing for land, buildings, and other commercial real estate owned or constructed by real estate developers, automobile dealerships, or other customers with real estate project financing needs. Products and services are delivered through highly specialized relationship-focused bankers and product partners.

Regional Banking and The Huntington Private Client Group - The core business of The Huntington Private Client Group is The Huntington Private Bank, which consists of Private Banking, Wealth & Investment Management, and Retirement Plan Services. The Huntington Private Bank provides high net-worth customers with deposit, lending (including specialized lending options), and banking services. The Huntington Private Bank delivers wealth management and legacy planning through investment and portfolio management, fiduciary administration, and trust services. This group also provides retirement plan services to corporate businesses. The Huntington Private Client Group provides corporate trust services and institutional and mutual fund custody services and insurance services.

Listed in the table below is certain operating basis financial information reconciled to Huntington’s September 30, 2017, December 31, 2016, and September 30, 2016, reported results by business segment.

	Three Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	426,752	$	171,448	$	139,870	$	49,596	$	(29,233	)	$	758,433
Provision for (reduction in allowance) credit losses	24,089		9,580		9,705		216		—			43,590
Noninterest income	189,378		59,121		10,969		46,215		24,414			330,097
Noninterest expense	415,874		100,003		55,354		58,237		50,960			680,428
Income taxes	61,658		42,345		30,022		13,076		(57,157		)	89,944
Net income	$	114,509	$	78,641	$	55,758	$	24,282	$	1,378		$	274,568
2016
Net interest income	$	349,283	$	143,023	$	126,489	$	41,971	$	(35,376	)	$	625,390
Provision for (reduction in allowance) credit losses	12,724		23,788		25,615		1,663		15			63,805
Noninterest income	177,234		54,744		8,001		45,339		17,097			302,415
Noninterest expense	349,470		87,892		44,331		57,473		173,081			712,247
Income taxes	57,513		30,130		22,590		9,861		(95,345		)	24,749
Net income	$	106,810	$	55,957	$	41,954	$	18,313	$	(96,030	)	$	127,004

97

	Nine Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	1,255,617	$	514,900	$	419,556	$	145,089	$	(102,242	)	$	2,232,920
Provision for credit losses	74,270		21,378		40,047		510		1			136,206
Noninterest income	544,445		176,609		34,750		140,610		71,364			967,778
Noninterest expense	1,242,152		301,385		163,989		182,171		192,517			2,082,214
Income taxes	169,274		129,061		87,594		36,056		(194,110		)	227,875
Net income	$	314,366	$	239,685	$	162,676	$	66,962	$	(29,286	)	$	754,403
2016
Net interest income	$	911,706	$	355,263	$	317,704	$	112,473	$	(62,809	)	$	1,634,337
Provision for credit losses	43,474		53,212		18,706		490		14			115,896
Noninterest income	459,732		150,228		25,951		126,245		53,238			815,394
Noninterest expense	967,417		246,941		125,254		166,645		220,731			1,726,988
Income taxes	126,191		71,868		69,893		25,054		(159,017		)	133,989
Net income	$	234,356	$	133,470	$	129,802	$	46,529	$	(71,299	)	$	472,858

	Assets at				Deposits at
(dollar amounts in thousands)	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Consumer & Business Banking	$	25,989,043	$	25,332,635	$	45,694,477	$	45,355,745
Commercial Banking	24,199,091		24,121,689		20,795,143		18,053,208
CREVF	24,723,324		23,576,832		2,052,274		1,893,072
RBHPCG	5,695,880		5,327,622		5,944,240		6,214,250
Treasury / Other	21,380,788		21,355,319		3,958,979		4,091,442
Total	$	101,988,126	$	99,714,097	$	78,445,113	$	75,607,717

98

Item 3: Quantitative and Qualitative Disclosures about Market Risk

Quantitative and qualitative disclosures for the current period can be found in the Market Risk section of this report, which includes changes in market risk exposures from disclosures presented in Huntington’s 2016 Form 10-K.

Item 4: Controls and Procedures

Disclosure Controls and Procedures

Huntington maintains disclosure controls and procedures designed to ensure that the information required to be disclosed in the reports that it files (or submits) under the Securities Exchange Act of 1934, as amended, are recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Exchange Act is accumulated and communicated to the issuer’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Huntington’s Management, with the participation of its Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of Huntington’s disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon such evaluation, Huntington’s Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, Huntington’s disclosure controls and procedures were effective.

There have not been any changes in Huntington’s internal controls over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the fiscal quarter to which this report relates that have materially affected, or are reasonably likely to materially affect, Huntington’s internal control over financial reporting.

99

PART II. OTHER INFORMATION

In accordance with the instructions to Part II, the other specified items in this part have been omitted because they are not applicable or the information has been previously reported.

Item 1: Legal Proceedings

Information required by this item is set forth in Note 14 of the Notes to Unaudited Condensed Consolidated Financial Statements included in Item 1 of this report and incorporated herein by reference.

Item 1A: Risk Factors

Information required by this item is set forth in Part 1 Item 2- Management’s Discussion and Analysis of Financial Condition and Results of Operations of this report and incorporated herein by reference.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a) and (b)

Not Applicable

(c)

Period	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Maximum Number of Shares (or Approximate Dollar Value) that May Yet Be Purchased Under the Plans or Programs (2)
July 1, 2017 to July 31, 2017	1,122,116	$	13.20	$	293,164,850
August 1, 2017 to August 31, 2017	6,046,079	12.81		215,621,231
September 1, 2017 to September 30, 2017	2,476,746	12.43		184,795,094
Total	9,644,941	$	12.75	$	184,795,094

(1) The reported shares were repurchased pursuant to Huntington’s publicly-announced stock repurchase authorizations.

(2) The number shown represents, as of the end of each period, the maximum number of shares (or approximate dollar value) of Common Stock that may yet be purchased under publicly-announced stock repurchase authorizations. The shares may be purchased, from time-to-time, depending on market conditions.

On June 28, 2017, Huntington was notified by the Federal Reserve that it had no objection to Huntington's proposed capital actions included in Huntington's capital plan submitted in the 2017 Comprehensive Capital Analysis and Review (CCAR). These actions included a 38% increase in the quarterly dividend per common share to $0.11, starting in the fourth quarter of 2017, the repurchase of up to $308 million of common stock over the next four quarters (July 1, 2017 through June 30, 2018), subject to authorization by the Board of Directors, and maintaining dividends on the outstanding classes of preferred stock and trust preferred securities.

On July 19, 2017, the Board authorized the repurchase of up to $308 million of common shares over the four quarters through the second quarter of 2018. Purchases of common stock under the authorization may include open market purchases, privately-negotiated transactions, and accelerated repurchase programs.

Item 6. Exhibits

Exhibit Index

This report incorporates by reference the documents listed below that we have previously filed with the SEC. The SEC allows us to incorporate by reference information in this document. The information incorporated by reference is considered to be a part of this document, except for any information that is superseded by information that is included directly in this document.

This information may be read and copied at the Public Reference Room of the SEC at 100 F Street, N.E., Washington, D.C. 20549. The SEC also maintains an Internet website that contains reports, proxy statements, and other information about issuers like us who file electronically with the SEC. The address of the site is http://www.sec.gov. The reports and other information filed by us with the SEC are also available at our Internet web site. The address of the site is http://www.huntington.com. Except as specifically incorporated by reference into this Quarterly Report on Form 10-Q, information on those websites is not part of this report. Reports, proxy statements, and other information about us can also be inspected at the offices of the NASDAQ National Market at 33 Whitehall Street, New York, New York.

100

Exhibit Number	Document Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference
3.1 (P)	Articles of Restatement of Charter.	Annual Report on Form 10-K for the year ended December 31, 1993	000-02525	3	(i)
3.2	Articles of Amendment to Articles of Restatement of Charter.	Current Report on Form 8-K dated May 31, 2007	000-02525	3.1
3.3	Articles of Amendment to Articles of Restatement of Charter.	Current Report on Form 8-K dated May 7, 2008	000-02525	3.1
3.4	Articles of Amendment to Articles of Restatement of Charter.	Current Report on Form 8-K dated April 27, 2010	001-34073	3.1
3.5	Articles Supplementary of Huntington Bancshares Incorporated, as of April 22, 2008.	Current Report on Form 8-K dated April 22, 2008	000-02525	3.1
3.6	Articles Supplementary of Huntington Bancshares Incorporated, as of April 22. 2008.	Current Report on Form 8-K dated April 22, 2008	000-02525	3.2
3.7	Articles Supplementary of Huntington Bancshares Incorporated, as of November 12, 2008.	Current Report on Form 8-K dated November 12, 2008	001-34073	3.1
3.8	Articles Supplementary of Huntington Bancshares Incorporated, as of December 31, 2006.	Annual Report on Form 10-K for the year ended December 31, 2006	000-02525	3.4
3.9	Articles Supplementary of Huntington Bancshares Incorporated, as of December 28, 2011.	Current Report on Form 8-K dated December 28, 2011	001-34073	3.1
3.10	Articles Supplementary of Huntington Bancshares Incorporated, as of March 18, 2016.	Current Report on Form 8-K dated March 21, 2016	001-34073	3.1
3.11	Articles Supplementary of Huntington Bancshares Incorporated, as of May 3, 2016.	Current Report on Form 8-K dated May 5, 2016	001-34073	3.2
3.12	Articles Supplementary of Huntington Bancshares Incorporated, effective as of August 15, 2016.	Registration Statement on Form 8-A dated August 15, 2016	001-34073	3.12
3.13	Bylaws of Huntington Bancshares Incorporated, as amended and restated, as of July 19, 2017.	Current Report on Form 8-K dated July 21, 2017	001-34073	3.1
4.1(P)	Instruments defining the Rights of Security Holders—reference is made to Articles Fifth, Eighth, and Tenth of Articles of Restatement of Charter, as amended and supplemented. Instruments defining the rights of holders of long-term debt will be furnished to the Securities and Exchange Commission upon request.
31.1	*Rule 13a-14(a) Certification – Chief Executive Officer.
31.2	*Rule 13a-14(a) Certification – Chief Financial Officer.
32.1	**Section 1350 Certification – Chief Executive Officer.

101

32.2

**Section 1350 Certification – Chief Financial Officer.

101

*The following material from Huntington’s Form 10-Q Report for the quarterly period ended September 30, 2017, formatted in XBRL: (1) Unaudited Condensed Consolidated Balance Sheets, (2) Unaudited Condensed Consolidated Statements of Income, (3) Unaudited Condensed Consolidated Statements of Comprehensive Income (4) Unaudited Condensed Consolidated Statement of Changes in Shareholders’ Equity, (5) Unaudited Condensed Consolidated Statements of Cash Flows, and (6) the Notes to Unaudited Condensed Consolidated Financial Statements.

*	Filed herewith
**	Furnished herewith

102

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Huntington Bancshares Incorporated

(Registrant)

Date:	October 30, 2017	/s/ Stephen D. Steinour
		Stephen D. Steinour
		Chairman, Chief Executive Officer and President
Date:	October 30, 2017	/s/ Howell D. McCullough III
		Howell D. McCullough III
		Chief Financial Officer

103

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Stephen D. Steinour, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Huntington Bancshares Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)), for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2017
		/s/	Stephen D. Steinour
			Stephen D. Steinour
			Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Howell D. McCullough III, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Huntington Bancshares Incorporated;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)), for the registrant and have:

5. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

a) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

b) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

c) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

6. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2017
		/s/	Howell D. McCullough III
			Howell D. McCullough III
			Chief Financial Officer

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATION

In connection with the Quarterly Report of Huntington Bancshares Incorporated (the “Company”) on Form 10-Q for the three months ended September 30, 2017, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stephen D. Steinour, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/	Stephen D. Steinour
	Stephen D. Steinour
	Chief Executive Officer
	October 30, 2017

EX-32.2

Exhibit 32.2

SECTION 1350 CERTIFICATION

In connection with the Quarterly Report of Huntington Bancshares Incorporated (the “Company”) on Form 10-Q for the three months ended September 30, 2017, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Howell D. McCullough III, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/	Howell D. McCullough III
	Howell D. McCullough III
	Chief Financial Officer
	October 30, 2017

XML

Document and Entity Information	9 Months Ended
	Sep. 30, 2017 shares
Document and Entity Information [Abstract]
Entity Registrant Name	HUNTINGTON BANCSHARES INC/MD
Entity Central Index Key	0000049196
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)	1,080,946,315

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 1,193,738	$ 1,384,770
Interest-bearing deposits in banks		50,090	58,267
Trading account securities		88,488	133,295
Loans held for sale (includes $584,829 and $438,224 respectively, measured at fair value)(1)	[1]	651,734	512,951
Available-for-sale and other securities		15,453,061	15,562,837
Held-to-maturity securities		8,688,399	7,806,939
Loans and leases (includes $99,191 and $82,319 respectively, measured at fair value)(1)	[1]	68,587,296	66,961,996
Allowance for loan and lease losses		(675,486)	(638,413)
Net loans and leases		67,911,810	66,323,583
Bank owned life insurance		2,459,807	2,432,086
Premises and equipment		853,290	815,508
Goodwill		1,992,849	1,992,849
Other intangible assets		359,844	402,458
Servicing rights		229,746	225,578
Accrued income and other assets		2,055,270	2,062,976
Total assets		101,988,126	99,714,097
Liabilities
Deposits		78,445,113	75,607,717
Short-term borrowings		1,829,549	3,692,654
Long-term debt		9,200,707	8,309,159
Accrued expenses and other liabilities		1,813,908	1,796,421
Total liabilities		91,289,277	89,405,951
Shareholders’ equity
Preferred Stock		1,071,286	1,071,227
Common stock		10,844	10,886
Capital surplus		9,820,600	9,881,277
Less treasury shares, at cost		(35,133)	(27,384)
Accumulated other comprehensive loss		(369,963)	(401,016)
Retained earnings (deficit)		201,215	(226,844)
Total shareholders’ equity		10,698,849	10,308,146
Total liabilities and shareholders’ equity		$ 101,988,126	$ 99,714,097
Common shares authorized (par value of $0.01) (in shares)		1,500,000,000	1,500,000,000
Common shares issued (in shares)		1,084,366,589	1,088,641,251
Common shares outstanding (in shares)		1,080,946,315	1,085,688,538
Treasury shares outstanding (in shares)		3,420,274	2,952,713
Preferred stock, authorized shares (in shares)		6,617,808	6,617,808
Preferred shares issued (in shares)		2,702,571	2,702,571
Preferred shares outstanding (in shares)		1,098,006	1,098,006

[1] Amounts represent loans for which Huntington has elected the fair value option.

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Loans held for sale, fair value	$ 584,829	$ 438,224
Loans and leases, fair value	$ 99,191	$ 82,319
Shareholders’ equity
Common stock, par value	$ 0.01	$ 0.01

XML

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest and fee income:
Loans and leases	$ 724,284	$ 583,653	$ 2,100,056	$ 1,516,849
Available-for-sale and other securities
Taxable	74,409	57,572	228,986	138,178
Tax-exempt	18,579	13,687	55,961	40,499
Held-to-maturity securities—taxable	48,743	33,098	138,214	105,307
Other	6,972	6,336	16,554	16,422
Total interest income	872,987	694,346	2,539,771	1,817,255
Interest expense:
Deposits	49,611	26,233	126,688	71,575
Short-term borrowings	5,713	959	16,782	2,770
Federal Home Loan Bank advances	65	66	197	207
Subordinated notes and other long-term debt	59,165	41,698	163,184	108,366
Total interest expense	114,554	68,956	306,851	182,918
Net interest income	758,433	625,390	2,232,920	1,634,337
Provision for credit losses	43,590	63,805	136,206	115,896
Net interest income after provision for credit losses	714,843	561,585	2,096,714	1,518,441
Service charges on deposit accounts	90,681	86,847	261,683	232,722
Cards and payment processing income	53,647	44,320	153,301	119,951
Mortgage banking income	33,615	40,603	97,575	90,737
Trust and investment management services	33,531	28,923	99,633	74,258
Insurance income	13,992	15,865	45,099	48,037
Brokerage income	14,458	14,719	46,510	44,819
Capital markets fees	21,719	14,750	52,755	40,797
Bank owned life insurance income	16,453	14,452	49,317	40,500
Gain on sale of loans	13,877	7,506	38,701	22,166
Net gains on sales of securities	71	1,031	3,781	1,763
Other noninterest income	38,157	33,399	123,110	99,720
Total noninterest income	330,097	302,415	967,778	815,394
Personnel costs	377,088	405,024	1,151,085	989,369
Outside data processing and other services	79,586	91,133	241,957	216,047
Equipment	45,458	40,792	135,082	105,173
Net occupancy	55,124	41,460	175,437	103,640
Professional services	15,227	47,075	51,712	82,101
Marketing	16,970	14,438	49,736	41,479
Deposit and other insurance expense	18,514	14,940	59,031	38,335
Amortization of intangibles	14,017	9,046	42,614	16,357
Other noninterest expense	58,444	48,339	175,560	134,487
Total noninterest expense	680,428	712,247	2,082,214	1,726,988
Income before income taxes	364,512	151,753	982,278	606,847
Provision for income taxes	89,944	24,749	227,875	133,989
Net income	274,568	127,004	754,403	472,858
Dividends on preferred shares	18,903	18,537	56,670	46,409
Net income applicable to common shares	$ 255,665	$ 108,467	$ 697,733	$ 426,449
Average common shares—basic (in shares)	1,086,038	938,578	1,087,115	844,167
Average common shares—diluted (in shares)	1,106,491	952,081	1,107,878	856,934
Per common share:
Net income—basic (in usd per share)	$ 0.24	$ 0.12	$ 0.64	$ 0.51
Net income—diluted (in usd per share)	0.23	0.11	0.63	0.50
Cash dividends declared (in usd per share)	$ 0.08	$ 0.07	$ 0.24	$ 0.21
OTTI losses for the periods presented:
Total OTTI losses	$ (104)	$ 0	$ (3,693)	$ (3,809)
Noncredit-related portion of loss recognized in OCI	0	0	6	3,733
Impairment losses recognized in earnings on available-for-sale securities	$ (104)	$ 0	$ (3,687)	$ (76)

XML

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	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	$ 274,568	$ 127,004	$ 754,403	$ 472,858
Unrealized gains (losses) on available-for-sale and other securities:
Non-credit-related impairment recoveries (losses) on debt securities not expected to be sold	265	1,294	2,391	(388)
Unrealized net gains (losses) on available-for-sale and other securities arising during the period, net of reclassification for net realized gains and losses	21,968	35,036	(25,081)	(47,118)
Total unrealized gains (losses) on available-for-sale and other securities	(21,703)	(33,742)	27,472	46,730
Unrealized gains (losses) on cash flow hedging derivatives, net of reclassifications to income	1,318	(5,232)	1,563	4,731
Change in accumulated unrealized losses for pension and other post-retirement obligations	779	841	2,018	2,522
Other comprehensive income (loss), net of tax	(19,606)	(38,133)	31,053	53,983
Comprehensive income	$ 254,962	$ 88,871	$ 785,456	$ 526,841

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Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital Surplus	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings (Deficit)	Preferred Stock	Series A Preferred Stock	Series A Preferred Stock Retained Earnings (Deficit)	Series B Preferred Stock	Series B Preferred Stock Retained Earnings (Deficit)	Series C Preferred Stock	Series C Preferred Stock Capital Surplus	Series C Preferred Stock Retained Earnings (Deficit)	Series C Preferred Stock Preferred Stock	Series D Preferred Stock	Series D Preferred Stock Retained Earnings (Deficit)	Series D Preferred Stock Preferred Stock
Balance, beginning of period (in shares) at Dec. 31, 2015		796,970		(2,041)
Balance, beginning of period at Dec. 31, 2015	$ 6,594,606	$ 7,970	$ 7,038,502	$ (17,932)	$ (226,158)	$ (594,067)	$ 386,291
Comprehensive Income:
Net income	472,858					472,858
Other comprehensive income (loss)	53,983				53,983
Cash dividends declared:
Common stock, dividend	(187,710)					(187,710)
Preferred stock, dividend								$ (23,110)	$ (23,110)	$ (890)	$ (890)	$ (1,159)		$ (1,159)		$ (21,250)	$ (21,250)
Recognition of the fair value of share-based compensation	48,568		48,568
Other share-based compensation activity (in shares)		5,014
Other share-based compensation activity	616	$ 50	4,389			(3,823)
Stock Issued During Period, Shares, New Issues		322
Other (in shares)				(908)
Other	(9,111)		119	$ (9,001)		(229)
Balance, end of period (in shares) at Sep. 30, 2016		1,087,731		(2,949)
Balance, end of period at Sep. 30, 2016	10,386,765	$ 10,877	9,863,149	$ (26,933)	(172,175)	(359,380)	1,071,227
Cash dividends declared:
Stock Issued During Period, Shares, Acquisitions		285,425
Stock Issued During Period, Value, Acquisitions	2,766,898	$ 2,854	2,764,044
Stock Issued During Period, Value, New Issues	3,210	$ 3	3,207									104,320	$ 4,320		$ 100,000	584,936		$ 584,936
Balance, beginning of period (in shares) at Dec. 31, 2016		1,088,641		(2,953)
Balance, beginning of period at Dec. 31, 2016	10,308,146	$ 10,886	9,881,277	$ (27,384)	(401,016)	(226,844)	1,071,227
Comprehensive Income:
Net income	754,403					754,403
Other comprehensive income (loss)	31,053				31,053
Cash dividends declared:
Common stock, dividend	(260,919)					(260,919)
Preferred stock, dividend								$ (23,110)	$ (23,110)	$ (1,028)	$ (1,028)	$ (4,407)		$ (4,407)		$ (28,125)	$ (28,125)
Recognition of the fair value of share-based compensation	72,747		72,747
Other share-based compensation activity (in shares)		5,361
Other share-based compensation activity	(20,374)	$ 53	(11,928)			(8,499)
Other (in shares)		(10)		468
Other	(6,333)	$ 1	1,612	$ (7,749)		(256)	59
Balance, end of period (in shares) at Sep. 30, 2017		1,084,367		(3,421)
Balance, end of period at Sep. 30, 2017	10,698,849	$ 10,844	9,820,600	$ (35,133)	$ (369,963)	$ 201,215	$ 1,071,286
Cash dividends declared:
Stock Repurchased and Retired During Period, Shares		9,645
Stock Repurchased and Retired During Period, Value	$ 123,204	$ 96	$ 123,108

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Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash dividends declared:
Common stock, Cash dividend per share (in usd per share)	$ 0.24	$ 0.21
Series A Preferred Stock
Cash dividends declared:
Preferred stock dividend per share (in usd per share)	63.75	63.75
Series B Preferred Stock
Cash dividends declared:
Preferred stock dividend per share (in usd per share)	28.96	25.08
Series C Preferred Stock
Cash dividends declared:
Preferred stock dividend per share (in usd per share)	44.07	11.59
Series D Preferred Stock
Cash dividends declared:
Preferred stock dividend per share (in usd per share)	$ 46.88	$ 35.42

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 754,403	$ 472,858
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	136,206	115,896
Depreciation and amortization	307,063	299,444
Share-based compensation expense	72,747	48,568
Deferred income tax expense (benefit)	36,244	(18,094)
Net gains on sales of securities	(3,781)	(1,763)
Impairment losses recognized in earnings on available-for-sale securities	3,687	76
Net change in:
Trading account securities	44,807	926
Loans held for sale	(164,405)	(194,735)
Accrued income and other assets	(136,485)	(169,453)
Accrued expense and other liabilities	42,162	144,496
Other, net	13,647	(12,413)
Net cash provided by (used for) operating activities	1,106,295	685,806
Investing activities
Change in interest bearing deposits in banks	20,688	33,221
Payments to Acquire Businesses, Net of Cash Acquired	0	(133,218)
Proceeds from:
Maturities and calls of available-for-sale and other securities	1,081,091	1,266,031
Maturities of held-to-maturity securities	792,996	850,170
Sales of available-for-sale and other securities	1,255,152	3,893,482
Purchases of available-for-sale and other securities	(3,208,608)	(5,434,332)
Purchases of held-to-maturity securities	(689,670)	0
Net proceeds from sales of portfolio loans	427,142	352,277
Net loan and lease activity, excluding sales and purchases	(2,159,966)	(3,286,238)
Purchases of premises and equipment	(144,637)	(63,688)
Proceeds from sales of other real estate	25,156	21,765
Purchases of loans and leases	(112,859)	(359,208)
Other, net	11,556	(249)
Net cash provided by (used for) investing activities	(2,701,959)	(2,859,987)
Financing activities
Increase (decrease) in deposits	2,837,396	853,806
Increase (decrease) in short-term borrowings	(1,865,157)	363,518
Net proceeds from issuance of long-term debt	1,773,096	2,081,643
Maturity/redemption of long-term debt	(882,977)	(684,746)
Dividends paid on preferred stock	(56,632)	(46,409)
Dividends paid on common stock	(261,593)	(168,656)
Payments for Repurchase of Common Stock	(123,204)	0
Proceeds from stock options exercised	9,316	6,084
Net proceeds from issuance of preferred stock	0	584,936
Payments related to tax-withholding for share based compensation awards	(25,613)	0
Other, net	0	(1,212)
Net cash provided by (used for) financing activities	1,404,632	2,988,964
Increase (decrease) in cash and cash equivalents	(191,032)	814,783
Cash and cash equivalents at beginning of period	1,384,770	847,156
Cash and cash equivalents at end of period	1,193,738	1,661,939
Supplemental disclosures:
Interest paid	307,493	159,357
Income taxes paid (refunded)	71,165	3,869
Non-cash activities
Loans transferred to held-for-sale from portfolio	446,152	3,204,732
Loans transferred to portfolio from held-for-sale	4,751	92,585
Transfer of loans to OREO	23,691	18,678
Available For Sale Securities Transferred To Held To Maturity Securities	$ 992,760	$ 0

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ACCOUNTING STANDARDS UPDATE

9 Months Ended

Sep. 30, 2017

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

ACCOUNTING STANDARDS UPDATE

ACCOUNTING STANDARDS UPDATE

Standard	Summary of guidance	Effects on financial statements
ASU 2014-09 - Revenue from Contracts with Customers (Topic 606): Issued May 2014	- Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance. - Requires an entity to recognize revenue upon 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. - Also requires additional qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers - Guidance sets forth a five step approach for revenue recognition.	- Effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Management intends to adopt the new guidance on January 1, 2018 using the modified retrospective approach. - Management's analysis includes: (a) Identification of all revenue streams included in the financial statements; (b) Determination of scope exclusions to identify ‘in-scope’ revenue streams; (c) Determination of size, timing, and amount of revenue recognition for in-scope items; (d) Identification of contracts for further analysis; and (e) Completion of review of certain contracts to evaluate the potential impact of the new guidance. - Key revenue streams identified include service charges, credit card and payment processing fees, trust services fees, insurance income, brokerage services, and mortgage banking income. - The new guidance is not expected to have a significant impact on Huntington’s Unaudited Consolidated Financial Statements.

Standard	Summary of guidance	Effects on financial statements
ASU 2016-01 - Recognition and Measurement of Financial Assets and Financial Liabilities. Issued January 2016	- Improvements to GAAP disclosures including requiring an entity to: (a) Measure its equity investments with changes in the fair value recognized in the income statement. (b) Present separately in OCI 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 in accordance with the fair value option for financial instruments (i.e., FVO liability). (c) Use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. (d) Assess deferred tax assets related to a net unrealized loss on AFS securities in combination with the entity’s other deferred tax assets.	- Effective for the fiscal period beginning after December 15, 2017, including interim periods within those fiscal years. - Amendments are applied as a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2016-02 - Leases. Issued February 2016	- New lease accounting model for lessors and lessees. For lessees, virtually all leases will be required to be recognized on the balance sheet by recording a right-of-use asset and lease liability. Subsequent accounting for leases varies depending on whether the lease is an operating lease or a finance lease. - Accounting applied by a lessor is largely unchanged from that applied under the existing guidance. - Requires additional qualitative and quantitative disclosures with the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases.	- Effective for the fiscal period beginning after December 15, 2018, with early application permitted. - Management intends to adopt the guidance on January 1, 2019, and has formed a working group comprised of associates from different disciplines, including Procurement, Real Estate, and Credit Administration, to evaluate the impact of the standard where Huntington is a lessee or lessor, as well as any impact to borrower’s financial statements. - Management is currently assessing the impact of the new guidance on Huntington's Unaudited Consolidated Financial Statements, including working with associates engaged in the procurement of goods and services used in the entity’s operations, and reviewing contractual arrangements for embedded leases in an effort to identify Huntington’s full lease population. - Huntington will recognize right-of-use assets and lease liabilities for virtually all of its operating lease commitments.
ASU 2016-13 - Financial Instruments - Credit Losses. Issued June 2016	- Eliminates the probable recognition threshold for credit losses on financial assets measured at amortized cost. - Requires those financial assets to be presented at the net amount expected to be collected (i.e., net of expected credit losses). - Measurement of expected credit losses should be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount.	- Effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. - Applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. - Management intends to adopt the guidance on January 1, 2020 and has formed a working group comprised of teams from different disciplines including credit and finance to evaluate the requirements of the new standard and the impact it will have on our processes. - The early stages of this evaluation include a review of existing credit models to identify areas where existing credit models used to comply with other regulatory requirements may be leveraged and areas where new impairment models may be required.
ASU 2016-15 - Classification of Certain Cash Receipts and Cash Payments. Issued August 2016	- Clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. - Provides consistent principles for evaluating the classification of cash payments and receipts in the statement of cash flows to reduce diversity in practice with respect to several types of cash flows.	- Effective using a retrospective transition approach for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. - If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

Standard	Summary of guidance	Effects on financial statements
ASU 2017-04 - Simplifying the Test for Goodwill Impairment. Issued January 2017	- Simplifies the goodwill impairment test by eliminating Step 2 of the goodwill impairment process, which requires an entity to determine the implied fair value of its goodwill by assigning fair value to all its assets and liabilities. - Entities will instead recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. - Entities will still have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary.	- Effective for annual and interim goodwill tests performed in fiscal years beginning after December 15, 2019. Early adoption is permitted. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-07 - Improving the Presentation of Net Periodic Pension Cost and Periodic Postretirement Benefit Cost. Issued March 2017	- Requires that an employer report the service cost component of the pension cost and postretirement benefit cost in the same line items as other compensation costs arising from services rendered by the pertinent employees during the period. - Other components of the net benefit cost should be presented in the income statement separately from the service cost component.	- Effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-09 - Stock Compensation Modification Accounting. Issued May 2017	- Reduces the current diversity in practice and provides explicit guidance pertaining to the provisions of modification accounting. - Clarifies that an entity should account for effects of modification unless the fair value, vesting conditions and the classification of the modified award are the same as the original awards immediately before the original award is modified.	- Effective prospectively for annual periods and interim periods within those annual periods, beginning after December 15, 2017. Earlier application is permitted. - The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-12 - Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities. Issued August 2017	- Aligns the entity’s risk management activities and financial reporting for hedging relationships. - Requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. - Refines measurement techniques for hedges of benchmark interest rate risk. - Eliminates the separate measurement and reporting of hedge ineffectiveness. - Allows stated amount of assets in a closed portfolio to be fair value hedged by excluding proportion of hedged item related to prepayments, defaults and other events. - Eases hedge effectiveness testing including an option to perform qualitative testing.	- Effective for annual periods and interim periods within those annual periods, beginning after December 15, 2018. For cash flow and net investment hedges, cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness should be recognized in AOCI with a corresponding adjustment to retained earnings. Earlier application is permitted. - Huntington is considering adopting the new guidance on January 1, 2018. The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

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BASIS OF PRESENTATION

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION

The accompanying Unaudited Condensed Consolidated Financial Statements of Huntington reflect all adjustments consisting of normal recurring accruals which are, in the opinion of Management, necessary for a fair statement of the consolidated financial position, the results of operations, and cash flows for the periods presented. The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. These Unaudited Condensed Consolidated Financial Statements have been prepared according to the rules and regulations of the SEC and, therefore, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been omitted. The Notes to Consolidated Financial Statements appearing in Huntington’s 2016 Form 10-K, which include descriptions of significant accounting policies, as updated by the information contained in this report, should be read in conjunction with these interim financial statements.

For statement of cash flow purposes, cash and cash equivalents are defined as the sum of “Cash and due from banks” which includes amounts on deposit with the Federal Reserve and “Federal funds sold and securities purchased under resale agreements.”

In conjunction with applicable accounting standards, all material subsequent events have been either recognized in the Unaudited Condensed Consolidated Financial Statements or disclosed in the Notes to Unaudited Condensed Consolidated Financial Statements.

Certain amounts reported in prior periods have been reclassified to conform to the current period presentation.

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES

Loans and leases which Huntington has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are classified in the Unaudited Condensed Consolidated Balance Sheets as loans and leases. Except for loans which are accounted for at fair value, loans are carried at the principal amount outstanding, net of unamortized premiums and discounts and deferred loan fees and costs and purchase accounting adjustments, which resulted in a net premium of $295 million and $120 million at September 30, 2017 and December 31, 2016, respectively.

Loan and Lease Portfolio Composition

The following table provides a detailed listing of Huntington’s loan and lease portfolio at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Loans and leases:
Commercial and industrial	$	27,469,344		$	28,058,712
Commercial real estate	7,206,096			7,300,901
Automobile	11,876,033			10,968,782
Home equity	9,984,728			10,105,774
Residential mortgage	8,616,059			7,724,961
RV and marine finance	2,371,065			1,846,447
Other consumer	1,063,971			956,419
Loans and leases	68,587,296			66,961,996
Allowance for loan and lease losses	(675,486		)	(638,413		)
Net loans and leases	$	67,911,810		$	66,323,583

FirstMerit Purchased Credit-Impaired Loans

The following table presents a rollforward of the accretable yield for purchased credit impaired loans for the three-month and nine-month period ended September 30, 2017.

	Three Months Ended September 30,			Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2017
Balance, beginning of period	$	36,509		$	36,669
Accretion	(4,343		)	(13,833		)
Reclassification (to) from nonaccretable difference	3,044			12,374
Balance, end of period	$	35,210		$	35,210

The following table reflects the ending and unpaid balances of the purchase credit impaired loans at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance		Ending Balance		Unpaid Principal Balance
Commercial and industrial	$	48,606	$	72,117	$	68,338	$	100,031
Commercial real estate	16,383		29,689		34,042		56,320
Total	$	64,989	$	101,806	$	102,380	$	156,351

There was no allowance for loan losses recorded on the purchased credit-impaired loan portfolio at September 30, 2017 and December 31, 2016.

Nonaccrual and Past Due Loans

Loans are considered past due when the contractual amounts due with respect to principal and interest are not received within 30 days of the contractual due date. See Note 1 “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 the accounting policies related to the NALs.

The following table presents nonaccrual loans (NALs) by loan class at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Commercial and industrial	$	169,751	$	234,184
Commercial real estate	17,397		20,508
Automobile	4,076		5,766
Home equity	71,353		71,798
Residential mortgage	75,251		90,502
RV and marine finance	309		245
Other consumer	108		—
Total nonaccrual loans	$	338,245	$	423,003

The following table presents an aging analysis of loans and leases, including past due loans, by loan class at September 30, 2017 and December 31, 2016. (1)

	September 30, 2017
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	$	36,505	$	10,654	$	77,835	$	124,994	$	27,295,744	$	48,606	$	—	$	27,469,344	$	14,083	(2)
Commercial real estate	35,444		2,586		20,010		58,040		7,131,673		16,383		—		7,206,096		9,550
Automobile	79,457		17,167		10,449		107,073		11,767,782		—		1,178		11,876,033		10,239
Home equity	41,748		19,601		63,747		125,096		9,857,359		—		2,273		9,984,728		16,150
Residential mortgage	111,722		45,041		104,167		260,930		8,260,742		—		94,387		8,616,059		62,832		(3)
RV and marine finance	10,303		2,184		2,134		14,621		2,355,309		—		1,135		2,371,065		2,063
Other consumer	10,180		4,394		3,752		18,326		1,045,427		—		218		1,063,971		3,752
Total loans and leases	$	325,359	$	101,627	$	282,094	$	709,080	$	67,714,036	$	64,989	$	99,191	$	68,587,296	$	118,669

	December 31, 2016
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	42,052		20,136		74,174		136,362		27,854,012		68,338		—		28,058,712		18,148		(2)
Commercial real estate	21,187		3,202		29,659		54,048		7,212,811		34,042		—		7,300,901		17,215
Automobile	76,283		17,188		10,442		103,913		10,862,715		—		2,154		10,968,782		10,182
Home equity	38,899		23,903		53,002		115,804		9,986,697		—		3,273		10,105,774		11,508
Residential mortgage	122,469		37,460		116,682		276,611		7,373,414		—		74,936		7,724,961		66,952		(3)
RV and marine finance	10,009		2,230		1,566		13,805		1,831,123		—		1,519		1,846,447		1,462
Other consumer	9,442		4,324		3,894		17,660		938,322		—		437		956,419		3,895
Total loans and leases	$	320,341	$	108,443	$	289,419	$	718,203	$	66,059,094	$	102,380	$	82,319	$	66,961,996	$	129,362

(1) NALs are included in this aging analysis based on their past due status.

(2) Amounts include Huntington Technology Finance administrative lease delinquencies.

(3) Amounts include loans guaranteed by government organizations.

Allowance for Credit Losses

Huntington maintains two reserves, both of which reflect Management’s judgment regarding the appropriate level necessary to absorb probable and estimable credit losses inherent in our loan and lease portfolio as of the balance sheet date: the ALLL and the AULC. Combined, these reserves comprise the total ACL. The determination of the ACL requires significant estimates, including the timing and amounts of expected future cash flows on impaired loans and leases, consideration of current economic conditions, and historical loss experience pertaining to pools of homogeneous loans and leases, all of which may be susceptible to change. See Note 1 “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 the accounting policies related to the ACL.

The ACL is increased through a provision for credit losses that is charged to earnings, based on Management’s quarterly evaluation and is reduced by charge-offs, net of recoveries, and the ACL associated with loans sold or transferred to held-for-sale.

The following table presents ALLL and AULC activity by portfolio segment for the three-month and nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2017:
ALLL balance, beginning of period	$	474,576		$	193,420		$	667,996
Loan charge-offs	(19,278		)	(45,494		)	(64,772		)
Recoveries of loans previously charged-off	10,015			11,865			21,880
Provision for (reduction in allowance) loan and lease losses	8,810			41,573			50,383
Allowance for loans sold or transferred to loans held for sale	(1		)	—			(1		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	82,827		$	2,532		$	85,359
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(6,528		)	(265		)	(6,793		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052
Nine-month period ended September 30, 2017:
ALLL balance, beginning of period	$	451,091		$	187,322		$	638,413
Loan charge-offs	(58,051		)	(133,884		)	(191,935		)
Recoveries of loans previously charged-off	33,619			39,946			73,565
Provision for (reduction in allowance) loan and lease losses	47,539			107,980			155,519
Allowance for loans sold or transferred to loans held for sale	(76		)	—			(76		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	86,543		$	11,336		$	97,879
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(10,244		)	(9,069		)	(19,313		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2016:
ALLL balance, beginning of period	$	424,507		$	198,557		$	623,064
Loan charge-offs	(24,839		)	(34,429		)	(59,268		)
Recoveries of loans previously charged-off	8,312			10,891			19,203
Provision for (reduction in allowance) loan and lease losses	36,689			16,834			53,523
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,750		)	(19,624		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,717		$	10,031		$	73,748
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	9,739			543			10,282
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331
Nine-month period ended September 30, 2016:
ALLL balance, beginning of period	$	398,753		$	199,090		$	597,843
Loan charge-offs	(70,721		)	(91,784		)	(162,505		)
Recoveries of loans previously charged-off	62,127			35,006			97,133
Provision for (reduction in allowance) loan and lease losses	54,510			49,437			103,947
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,646		)	(19,520		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,448		$	8,633		$	72,081
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	10,008			1,941			11,949
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331

Credit Quality Indicators

See Note 4 “Loans / Leases and Allowance for Credit Losses” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for a description of the credit quality indicators Huntington utilizes for monitoring credit quality and for determining an appropriate ACL level.

The following table presents each loan and lease class by credit quality indicator at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	25,447,805	$	803,540	$	1,189,789	$	28,210	$	27,469,344
Commercial real estate	6,934,670		144,122		126,352		952		7,206,096
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,939,409	$	4,278,062	$	1,371,574	$	285,810	$	11,874,855
Home equity	6,359,778		2,985,933		621,817		14,927		9,982,455
Residential mortgage	5,311,993		2,479,820		599,055		130,804		8,521,672
RV and marine finance	1,385,176		853,545		91,302		39,907		2,369,930
Other consumer	404,047		510,804		136,346		12,556		1,063,753

	December 31, 2016
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	26,211,885	$	810,287	$	1,028,819	$	7,721	$	28,058,712
Commercial real estate	7,042,304		96,975		159,098		2,524		7,300,901
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,369,085	$	4,043,611	$	1,298,460	$	255,472	$	10,966,628
Home equity	6,280,328		2,891,330		637,560		293,283		10,102,501
Residential mortgage	4,662,777		2,285,121		615,067		87,060		7,650,025
RV and marine finance	1,064,143		644,039		72,995		63,751		1,844,928
Other consumer	346,867		455,959		133,243		19,913		955,982

(1) Excludes loans accounted for under the fair value option.

(2) Reflects most recent customer credit scores.

(3) Reflects deferred fees and costs, loans in process, loans to legal entities, etc.

Impaired Loans

See Note 1 “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 accounting policies related to impaired loans.

The following tables present the balance of the ALLL attributable to loans by portfolio segment individually and collectively evaluated for impairment and the related loan and lease balance at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at September 30, 2017:
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	22,838		13,874		36,712
Attributable to loans collectively evaluated for impairment	451,284		187,490		638,774
Total ALLL balance	$	474,122	$	201,364	$	675,486
Loan and Lease Ending Balances at September 30, 2017: (1)
Portion of loan and lease ending balance:
Purchased credit-impaired loans	$	64,989	$	—	$	64,989
Individually evaluated for impairment	566,340		621,808		1,188,148
Collectively evaluated for impairment	34,044,110		33,190,856		67,234,966
Total loans and leases evaluated for impairment	$	34,675,439	$	33,812,664	$	68,488,103

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at December 31, 2016
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	$	10,525	$	11,021	$	21,546
Attributable to loans collectively evaluated for impairment	440,566		176,301		616,867
Total ALLL balance:	$	451,091	$	187,322	$	638,413
Loan and Lease Ending Balances at December 31, 2016 (1)
Portion of loan and lease ending balances:
Purchased credit-impaired loans	$	102,380	$	—	$	102,380
Individually evaluated for impairment	415,624		457,890		873,514
Collectively evaluated for impairment	34,841,609		31,062,174		65,903,783
Total loans and leases evaluated for impairment	$	35,359,613	$	31,520,064	$	66,879,677

(1) Excludes loans accounted for under the fair value option.

The following tables present by class the ending, unpaid principal balance, and the related ALLL, along with the average balance and interest income recognized only for impaired loans and leases and purchased credit-impaired loans: (1), (2)

	September 30, 2017						Three Months Ended September 30, 2017				Nine Months Ended September 30, 2017
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,349	$	324,474	$	—	$	294,513	$	4,969	$	227,611	$	7,467
Commercial real estate	65,382		92,215		—		71,277		1,825		80,388		5,762
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	213,520		245,328		19,958		222,745		1,950		334,297		12,712
Commercial real estate	53,078		60,366		2,880		40,672		468		54,352		1,388
Automobile	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance	1,520		1,520		88		1,425		23		884		58
Other consumer	6,456		6,456		1,288		6,944		47		7,117		184
Total
Commercial and industrial (3)	512,869		569,802		19,958		517,258		6,919		561,908		20,179
Commercial real estate (4)	118,460		152,581		2,880		111,949		2,293		134,740		7,150
Automobile (2)	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity (5)	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage (5)	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance (2)	1,520		1,520		88		1,425		23		884		58
Other consumer (2)	6,456		6,456		1,288		6,944		47		7,117		184

	December 31, 2016						Three Months Ended September 30, 2016				Nine Months Ended September 30, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,606	$	358,712	$	—	$	305,956	$	2,235	$	290,163	$	4,858
Commercial real estate	88,817		126,152		—		80,000		907		58,666		2,257
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	406,243		448,121		22,259		281,934		1,631		274,262		5,460
Commercial real estate	97,238		107,512		3,434		49,140		521		49,587		1,895
Automobile	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance	—		—		—		—		—		—		—
Other consumer	3,897		3,897		260		4,454		58		4,627		178
Total
Commercial and industrial (3)	705,849		806,833		22,259		587,890		3,866		564,425		10,318
Commercial real estate (4)	186,055		233,664		3,434		129,140		1,428		108,253		4,152
Automobile (2)	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity (5)	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage (5)	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance (2)	—		—		—		—		—		—		—
Other consumer (2)	3,897		3,897		260		4,454		58		4,627		178

(1) These tables do not include loans fully charged-off.

(2) All automobile, RV and marine finance and other consumer impaired loans included in these tables are considered impaired due to their status as a TDR.

(3) At September 30, 2017 and December 31, 2016, commercial and industrial loans of $365 million and $317 million, respectively, were considered impaired due to their status as a TDR.

(4) At September 30, 2017 and December 31, 2016, commercial real estate loans of $84 million and $81 million, respectively, were considered impaired due to their status as a TDR.

(5) Includes home equity and residential mortgages considered to be collateral dependent due to their non-accrual status as well as home equity and mortgage loans considered impaired due to their status as a TDR.

(6) The differences between the ending balance and unpaid principal balance amounts represent partial charge-offs.

TDR Loans

TDRs are modified loans where a concession was provided to a borrower experiencing financial difficulties. Loan modifications are considered TDRs when the concessions provided are not available to the borrower through either normal channels or other sources. However, not all loan modifications are TDRs. Acquired, non-purchased credit impaired loans are only considered for TDR reporting for modifications made subsequent to acquisition. See Note 4 “Loans / Leases and Allowance for Credit Losses” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for an additional discussion of TDRs.

The following table presents, by class and modification type, the number of contracts, post-modification outstanding balance, and the financial effects of the modification for the three-month and nine-month periods ended September 30, 2017 and 2016.

	New Troubled Debt Restructurings During The Three-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	6	$	817	$	—		2	$	122	$	6
Amortization or maturity date change	271	138,381		(837		)	246	89,100		(1,450		)
Other	—	—		—			6	711		(2		)
Total Commercial and industrial	277	139,198		(837		)	254	89,933		(1,446		)
Commercial real estate:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	28	17,811		133			30	11,183		(546		)
Other	—	—		—			—	—		—
Total commercial real estate:	28	17,811		133			30	11,183		(546		)
Automobile:
Interest rate reduction	5	72		3			4	26		3
Amortization or maturity date change	487	3,943		124			452	4,438		559
Chapter 7 bankruptcy	305	2,562		69			236	1,840		157
Other	—	—		—			—	—		—
Total Automobile	797	6,577		196			692	6,304		719
Home equity:
Interest rate reduction	8	376		11			14	352		10
Amortization or maturity date change	160	11,676		(1,131		)	110	6,740		(574		)
Chapter 7 bankruptcy	79	2,728		647			70	2,395		1,327
Other	—	—		—			—	—		—
Total Home equity	247	14,780		(473		)	194	9,487		763
Residential mortgage:
Interest rate reduction	—	—		—			2	134		(2		)
Amortization or maturity date change	102	11,282		(272		)	77	7,988		(220		)
Chapter 7 bankruptcy	20	1,656		(2		)	17	1,105		(63		)
Other	1	64		2			3	260		—
Total Residential mortgage	123	13,002		(272		)	99	9,487		(285		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	10	84		3			—	—		—
Chapter 7 bankruptcy	22	492		15			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	32	576		18			—	—		—
Other consumer:
Interest rate reduction	18	52		—			—	—		—
Amortization or maturity date change	677	3,106		1			1	16		—
Chapter 7 bankruptcy	4	24		1			1	6		—
Other	—	—		—			—	—		—
Total Other consumer	699	3,182		2			2	22		—
Total new troubled debt restructurings	2,203	$	195,126	$	(1,233	)	1,271	$	126,416	$	(795	)

	New Troubled Debt Restructurings During The Nine-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	8	$	854	$	6		4	$	161	$	5
Amortization or maturity date change	735	418,924		(8,695		)	629	345,691		(4,368		)
Other	4	380		(27		)	16	1,801		(4		)
Total Commercial and industrial	747	420,158		(8,716		)	649	347,653		(4,367		)
Commercial real estate:
Interest rate reduction	—	—		—			1	84		—
Amortization or maturity date change	71	74,101		(682		)	90	60,995		(1,828		)
Other	—	—		—			4	315		16
Total commercial real estate:	71	74,101		(682		)	95	61,394		(1,812		)
Automobile:
Interest rate reduction	24	308		9			11	132		10
Amortization or maturity date change	1,298	11,097		302			1,159	11,002		981
Chapter 7 bankruptcy	743	5,878		116			797	6,384		386
Other	—	—		—			—	—		—
Total Automobile	2,065	17,283		427			1,967	17,518		1,377
Home equity:
Interest rate reduction	25	1,444		24			43	2,363		103
Amortization or maturity date change	401	25,544		(2,559		)	466	25,031		(2,592		)
Chapter 7 bankruptcy	243	8,764		2,049			215	8,106		2,327
Other	70	4,241		(326		)	—	—		—
Total Home equity	739	39,993		(812		)	724	35,500		(162		)
Residential mortgage:
Interest rate reduction	2	110		(9		)	12	1,195		(17		)
Amortization or maturity date change	282	30,649		(761		)	277	29,388		(1,217		)
Chapter 7 bankruptcy	69	6,328		(139		)	40	3,788		(42		)
Other	22	2,448		19			4	424		—
Total Residential mortgage	375	39,535		(890		)	333	34,795		(1,276		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	34	710		19			—	—		—
Chapter 7 bankruptcy	71	1,246		25			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	105	1,956		44			—	—		—
Other consumer:
Interest rate reduction	19	130		2			—	—		—
Amortization or maturity date change	681	3,394		8			6	575		24
Chapter 7 bankruptcy	7	36		1			8	72		7
Other	—	—		—			—	—		—
Total Other consumer	707	3,560		11			14	647		31
Total new troubled debt restructurings	4,809	$	596,586	$	(10,618	)	3,782	$	497,507	$	(6,209	)

(1) TDRs may include multiple concessions and the disclosure classifications are based on the primary concession provided to the borrower.

(2) Amount represents the financial impact via provision for loan and lease losses as a result of the modification.

Pledged Loans and Leases

At September 30, 2017, the Bank has access to the Federal Reserve’s discount window and advances from the FHLB – Cincinnati. As of September 30, 2017, these borrowings and advances are secured by $32.0 billion of loans and securities.

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AVAILABLE-FOR-SALE AND OTHER SECURITIES

9 Months Ended

Sep. 30, 2017

Investments, Debt and Equity Securities [Abstract]

AVAILABLE-FOR-SALE AND OTHER SECURITIES

AVAILABLE-FOR-SALE AND OTHER SECURITIES

Listed below are the contractual maturities of available-for-sale and other securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
U.S. Treasury and Federal agency securities:
U.S. Treasury:
1 year or less	$	11,256	$	11,260	$	4,978	$	4,988
After 1 year through 5 years	—		—		502		509
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		—		—
Total U.S. Treasury	11,256		11,260		5,480		5,497
Federal agencies: mortgage-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	32,749		32,515		46,591		46,762
After 5 years through 10 years	257,032		255,488		173,941		176,404
After 10 years	10,496,277		10,351,747		10,630,929		10,450,176
Total Federal agencies: mortgage-backed securities	10,786,058		10,639,750		10,851,461		10,673,342
Other agencies:
1 year or less	4,201		4,223		4,302		4,367
After 1 year through 5 years	8,892		9,034		5,092		5,247
After 5 years through 10 years	82,692		83,194		63,618		63,928
After 10 years	—		—		—		—
Total other agencies	95,785		96,451		73,012		73,542
Total U.S. Treasury and Federal agency securities	10,893,099		10,747,461		10,929,953		10,752,381
Municipal securities:
1 year or less	163,747		160,032		169,636		166,887
After 1 year through 5 years	905,872		905,075		933,893		933,903
After 5 years through 10 years	1,656,860		1,655,384		1,463,459		1,464,583
After 10 years	703,350		705,618		693,440		684,684
Total municipal securities	3,429,829		3,426,109		3,260,428		3,250,057
Asset-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	80,003		80,330		80,700		80,560
After 5 years through 10 years	162,079		163,439		223,352		224,565
After 10 years	326,724		311,422		520,072		488,356
Total asset-backed securities	568,806		555,191		824,124		793,481
Corporate debt:
1 year or less	3,143		3,157		43,223		43,603
After 1 year through 5 years	66,878		68,450		78,430		80,196
After 5 years through 10 years	38,471		39,902		32,523		32,865
After 10 years	13,211		14,120		40,361		42,019
Total corporate debt	121,703		125,629		194,537		198,683
Other:
1 year or less	3,150		3,144		1,650		1,650
After 1 year through 5 years	800		791		2,302		2,283
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		10		10
Nonmarketable equity securities	583,019		583,019		547,704		547,704
Mutual funds	10,416		10,416		15,286		15,286
Marketable equity securities	861		1,301		861		1,302
Total other	598,246		598,671		567,813		568,235
Total available-for-sale and other securities	$	15,611,683	$	15,453,061	$	15,776,855	$	15,562,837

Other securities at September 30, 2017 and December 31, 2016 include non-marketable equity securities of $287 million and $249 million of stock issued by the FHLB and $296 million and $299 million of Federal Reserve Bank stock, respectively. Non-marketable equity securities are recorded at amortized cost.

The following tables provide amortized cost, fair value, and gross unrealized gains and losses recognized in OCI by investment category at September 30, 2017 and December 31, 2016:

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
U.S. Treasury	$	11,256	$	4	$	—		$	11,260
Federal agencies:
Mortgage-backed securities	10,786,058		5,851		(152,159		)	10,639,750
Other agencies	95,785		722		(56		)	96,451
Total U.S. Treasury, Federal agency securities	10,893,099		6,577		(152,215		)	10,747,461
Municipal securities	3,429,829		31,043		(34,763		)	3,426,109
Asset-backed securities	568,806		2,409		(16,024		)	555,191
Corporate debt	121,703		3,927		(1		)	125,629
Other securities	598,246		439		(14		)	598,671
Total available-for-sale and other securities	$	15,611,683	$	44,395	$	(203,017	)	$	15,453,061

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
U.S. Treasury	$	5,480	$	17	$	—		$	5,497
Federal agencies:
Mortgage-backed securities	10,851,461		12,548		(190,667		)	10,673,342
Other agencies	73,012		536		(6		)	73,542
Total U.S. Treasury, Federal agency securities	10,929,953		13,101		(190,673		)	10,752,381
Municipal securities	3,260,428		28,431		(38,802		)	3,250,057
Asset-backed securities	824,124		1,492		(32,135		)	793,481
Corporate debt	194,537		4,161		(15		)	198,683
Other securities	567,813		441		(19		)	568,235
Total available-for-sale and other securities	$	15,776,855	$	47,626	$	(261,644	)	$	15,562,837

The following tables provide detail on investment securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position as of September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,283,266	$	(125,950	)	$	1,003,097	$	(26,209	)	$	9,286,363	$	(152,159	)
Other agencies	11,607		(56		)	—		—			11,607		(56		)
Total Federal agency securities	8,294,873		(126,006		)	1,003,097		(26,209		)	9,297,970		(152,215		)
Municipal securities	1,293,344		(23,995		)	277,157		(10,768		)	1,570,501		(34,763		)
Asset-backed securities	199,109		(1,471		)	122,568		(14,553		)	321,677		(16,024		)
Corporate debt	200		(1		)	—		—			200		(1		)
Other securities	791		(8		)	1,494		(6		)	2,285		(14		)
Total temporarily impaired securities	$	9,788,317	$	(151,481	)	$	1,404,316	$	(51,536	)	$	11,192,633	$	(203,017	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	8,908,470	$	(189,318	)	$	41,706	$	(1,349	)	$	8,950,176	$	(190,667	)
Other agencies	924		(6		)	—		—			924		(6		)
Total Federal agency securities	8,909,394		(189,324		)	41,706		(1,349		)	8,951,100		(190,673		)
Municipal securities	1,412,152		(29,175		)	272,292		(9,627		)	1,684,444		(38,802		)
Asset-backed securities	361,185		(3,043		)	178,924		(29,092		)	540,109		(32,135		)
Corporate debt	3,567		(15		)	200		—			3,767		(15		)
Other securities	790		(11		)	1,492		(8		)	2,282		(19		)
Total temporarily impaired securities	$	10,687,088	$	(221,568	)	$	494,614	$	(40,076	)	$	11,181,702	$	(261,644	)

At September 30, 2017 and December 31, 2016, the carrying value of investment securities pledged to secure public and trust deposits, trading account liabilities, U.S. Treasury demand notes, and security repurchase agreements totaled $6.2 billion and $5.0 billion, respectively. There were no securities of a single issuer, which are not governmental or government-sponsored, that exceeded 10% of shareholders’ equity at either September 30, 2017 or December 31, 2016.

The following table is a summary of realized securities gains and losses for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Gross gains on sales of securities	$	4,201		$	3,770		$	8,311		$	7,161
Gross (losses) on sales of securities	(4,130		)	(2,739		)	(4,530		)	(5,398		)
Net gain on sales of securities	$	71		$	1,031		$	3,781		$	1,763
OTTI recognized in earnings	(104		)	—			(3,687		)	(76		)
Net securities gains (losses)	$	(33	)	$	1,031		$	94		$	1,687

Security Impairment

Huntington evaluates the available-for-sale securities portfolio on a quarterly basis for impairment and conducts a comprehensive security-level assessment on all available-for-sale securities. Impairment exists when the present value of the expected cash flows are not sufficient to recover the entire amortized cost basis at the balance sheet date. Under these circumstances, any credit impairment would be recognized in earnings. At the end of the second quarter of 2017, Huntington changed its intent from able and willing to hold to sell sometime in the near future prior to final maturity for the two Reg Diversified CDO securities. Related to this change in intent, Huntington estimated the fair value of these bonds by obtaining bids. As a result of this analysis, Huntington recognized $3.6 million of OTTI on these two securities. In addition, Huntington recognized an additional $0.1 million of OTTI in the 2017 third quarter relating an investment in the Municipal Securities portfolio. For all other securities, Huntington does not intend to sell, nor does it believe it will be required to sell these securities until the amortized cost is recovered, which may be at maturity.

The highest risk investments in the portfolio are the trust-preferred CDO securities which are in the asset-backed securities portfolio. This portfolio is in runoff, and the Company has not purchased these types of securities since 2005. The fair values of the CDO assets have been impacted by various market conditions. The unrealized losses are primarily the result of wider liquidity spreads on asset-backed securities and the longer expected average lives of the trust-preferred CDO securities, due to changes in the expectations of when the underlying securities will be repaid.

Collateralized Debt Obligations are backed by a pool of debt securities issued by financial institutions. The collateral generally consists of trust-preferred securities and subordinated debt securities issued by banks, bank holding companies, and insurance companies. Many collateral issuers have the option of deferring interest payments on their debt for up to five years. A full cash flow analysis is used to estimate fair values and assess impairment for each security within this portfolio. A third-party pricing specialist with direct industry experience in pooled-trust-preferred security evaluations is engaged to provide assistance estimating the fair value and expected cash flows on this portfolio. The full cash flow analysis is completed by evaluating the relevant credit and structural aspects of each pooled-trust-preferred security in the portfolio, including collateral performance projections for each piece of collateral in the security and terms of the security’s structure. The credit review includes an analysis of profitability, credit quality, operating efficiency, leverage, and liquidity using available financial and regulatory information for each underlying collateral issuer. The analysis also includes a review of historical industry default data, current / near-term operating conditions, and the impact of macroeconomic and regulatory changes.  Using the results of the analysis, the Company estimates appropriate default and recovery probabilities for each piece of collateral, then estimates the expected cash flows for each security. The fair value of each security is obtained by discounting the expected cash flows at a market discount rate. The market discount rate is determined by reference to yields observed in the market for similarly rated collateralized debt obligations, specifically high-yield collateralized loan obligations. The relatively high market discount rate is reflective of the uncertainty of the cash flows and illiquid nature of these securities. The large differential between the fair value and amortized cost of some of the securities reflects the high market discount rate and the expectation that the majority of the cash flows will not be received until near the final maturity of the security (the final maturities range from 2032 to 2035).

The following table summarizes the relevant characteristics of the Company's CDO securities portfolio, which are included in asset-backed securities, at September 30, 2017. Each security is part of a pool of issuers and supports a more senior tranche of securities except for the MM Comm III securities, which are the most senior class.

Collateralized Debt Obligation Securities

(dollar amounts in thousands)										Lowest Credit Rating (2)	# of Issuers Currently Performing/ Remaining (3)	Actual Deferrals and Defaults as a % of Original Collateral	Expected Defaults as a % of Remaining Performing Collateral	Excess Subordination (4)
Deal Name	Par Value		Amortized Cost		Fair Value		Unrealized Loss (1)
MM Comm III	4,509		4,308		3,641		(667		)	BB+	5/8	5	7	34
Reg Diversified	25,500		100		510		410			D		—	—	—
Tropic III	31,000		30,989		19,976		(11,013		)	BB	27/36	16	6	41
Total at September 30, 2017	$	61,009	$	35,397	$	24,127	$	(11,270	)
Total at December 31, 2016	$	137,197	$	101,210	$	76,003	$	(25,207	)

(1) The majority of securities have been in a continuous loss position for 12 months or longer.

(2) For purposes of comparability, the lowest credit rating expressed is equivalent to Fitch ratings even where the lowest rating is based on another nationally recognized credit rating agency.

(3) Includes both banks and/or insurance companies.

(4) Excess subordination percentage represents the additional defaults in excess of both current and projected defaults that the CDO can absorb before the bond experiences credit impairment. Excess subordinated percentage is calculated by (a) determining what percentage of defaults a deal can experience before the bond has credit impairment, and (b) subtracting from this default breakage percentage both total current and expected future default percentages.

For the three-month and nine-month periods ended September 30, 2017 and 2016, the following table summarizes by security type the total OTTI losses recognized in the Unaudited Condensed Consolidated Statements of Income for securities evaluated for impairment as described above.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Available-for-sale and other securities:
Collateralized Debt Obligations	$	—	$	—	$	3,559	$	—
Municipal Securities	104		—		128		76
Total available-for-sale and other securities	$	104	$	—	$	3,687	$	76

The following table presents the OTTI recognized in earnings on debt securities held by Huntington for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Balance, beginning of period	$	10,821		$	9,831		$	11,796		$	18,368
Reductions from sales	(5,373		)	(76		)	(9,931		)	(8,689		)
Additional credit losses	104			—			3,687			76
Balance, end of period	$	5,552		$	9,755		$	5,552		$	9,755

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HELD-TO-MATURITY SECURITIES

9 Months Ended

Sep. 30, 2017

Held-to-maturity Securities [Abstract]

HELD-TO-MATURITY SECURITIES

HELD-TO-MATURITY SECURITIES

Held-to-maturity securities are debt securities that Huntington has the intent and ability to hold until maturity. The debt securities are carried at amortized cost and adjusted for amortization of premiums and accretion of discounts using the interest method.

During the second quarter of 2017, Huntington transferred $1.0 billion of mortgage-backed and other agency securities from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The securities were reclassified at fair value at the date of transfer. At the time of the transfer, $13.5 million of unrealized net losses were recognized in OCI. The amounts in OCI will be recognized in earnings over the remaining life of the securities as an offset to the adjustment of yield in a manner consistent with the amortization of the premium on the same transferred securities, resulting in an immaterial impact on net income.

Listed below are the contractual maturities of held-to-maturity securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Federal agencies mortgage-backed securities:
1 year or less	$	—	$	—	$	—	$	—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	68,668		68,478		41,261		40,791
After 10 years	8,067,957		8,035,777		7,157,083		7,139,943
Total Federal agencies mortgage-backed securities	8,136,625		8,104,255		7,198,344		7,180,734
Other agencies:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	375,580		376,393		398,341		399,452
After 10 years	170,628		169,741		204,083		201,180
Total other agencies	546,208		546,134		602,424		600,632
Total Federal agencies	8,682,833		8,650,389		7,800,768		7,781,366
Municipal securities:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	—		—		—		—
After 10 years	5,566		5,416		6,171		5,902
Total municipal securities	5,566		5,416		6,171		5,902
Total held-to-maturity securities	$	8,688,399	$	8,655,805	$	7,806,939	$	7,787,268

The following table provides amortized cost, gross unrealized gains and losses, and fair value by investment category at September 30, 2017 and December 31, 2016.

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,136,625	$	14,868	$	(47,238	)	$	8,104,255
Other agencies	546,208		1,697		(1,771		)	546,134
Total Federal agencies	8,682,833		16,565		(49,009		)	8,650,389
Municipal securities	5,566		—		(150		)	5,416
Total held-to-maturity securities	$	8,688,399	$	16,565	$	(49,159	)	$	8,655,805

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	7,198,344	$	20,883	$	(38,493	)	$	7,180,734
Other agencies	602,424		1,690		(3,482		)	600,632
Total Federal agencies	7,800,768		22,573		(41,975		)	7,781,366
Municipal securities	6,171		—		(269		)	5,902
Total held-to-maturity securities	$	7,806,939	$	22,573	$	(42,244	)	$	7,787,268

The following tables provide detail on held-to-maturity securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position, at September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	5,729,896	$	(38,204	)	$	301,637	$	(9,034	)	$	6,031,533	$	(47,238	)
Other agencies	248,109		(1,771		)	—		—			248,109		(1,771		)
Total Federal agencies	5,978,005		(39,975		)	301,637		(9,034		)	6,279,642		(49,009		)
Municipal securities	—		—			5,416		(150		)	5,416		(150		)
Total temporarily impaired securities	$	5,978,005	$	(39,975	)	$	307,053	$	(9,184	)	$	6,285,058	$	(49,159	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	2,855,360	$	(31,470	)	$	186,226	$	(7,023	)	$	3,041,586	$	(38,493	)
Other agencies	413,207		(3,482		)	—		—			413,207		(3,482		)
Total Federal agencies	3,268,567		(34,952		)	186,226		(7,023		)	3,454,793		(41,975		)
Municipal securities	5,902		(269		)	—		—			5,902		(269		)
Total temporarily impaired securities	$	3,274,469	$	(35,221	)	$	186,226	$	(7,023	)	$	3,460,695	$	(42,244	)

Security Impairment

Huntington evaluates the held-to-maturity securities portfolio on a quarterly basis for impairment. Impairment exists when the present value of the expected cash flows is not sufficient to recover the entire amortized cost basis at the balance sheet date. Under these circumstances, any impairment would be recognized in earnings. As of September 30, 2017, Management has evaluated held-to-maturity securities with unrealized losses for impairment and concluded no OTTI is required.

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LOAN SALES AND SECURITIZATIONS

9 Months Ended

Sep. 30, 2017

Transfers and Servicing [Abstract]

LOAN SALES AND SECURITIZATIONS

LOAN SALES AND SECURITIZATIONS

Residential Mortgage Loans

The following table summarizes activity relating to residential mortgage loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Residential mortgage loans sold with servicing retained	$	1,178,955	$	1,204,547	$	2,824,707	$	2,552,602
Pretax gains resulting from above loan sales (1)	26,880		32,073		66,014		64,804

(1) Recorded in mortgage banking income.

A mortgage servicing right (MSR) is established only when the servicing is contractually separated from the underlying mortgage loans by sale or securitization of the loans with servicing rights retained. At initial recognition, the MSR asset is established at its fair value using assumptions consistent with assumptions used to estimate the fair value of existing MSRs. Subsequent to the initial recognition, MSRs may be measured using either the fair value method or the amortization method. The election of the fair value method or amortization method is made at the time each servicing class is established. Subsequently, servicing rights are accounted for based on the methodology chosen for each respective servicing class. Any increase or decrease in the fair value of MSRs carried under the fair value method, as well as amortization or impairment of MSRs recorded using the amortization method, during the period is recorded as an increase or decrease in mortgage banking income, which is reflected in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

The following tables summarize the changes in MSRs recorded using either the fair value method or the amortization method for the three-month and nine-month periods ended September 30, 2017 and 2016.

Fair Value Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Fair value, beginning of period	$	12,528		$	13,105		$	13,747		$	17,585
Change in fair value during the period due to:
Time decay (1)	(202		)	(217		)	(649		)	(734		)
Payoffs (2)	(295		)	(423		)	(876		)	(1,392		)
Changes in valuation inputs or assumptions (3)	(278		)	(37		)	(469		)	(3,031		)
Fair value, end of period:	$	11,753		$	12,428		$	11,753		$	12,428
Weighted-average life (years)	5.5			5.1			5.5			5.1

(1) Represents decrease in value due to passage of time, including the impact from both regularly scheduled loan principal payments and partial loan paydowns.

(2) Represents decrease in value associated with loans that paid off during the period.

(3) Represents change in value resulting primarily from market-driven changes in interest rates and prepayment speeds.

Amortization Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	176,491		$	121,292		$	172,466		$	143,133
New servicing assets created	12,841			12,434			30,694			25,820
Servicing assets acquired	—			15,317			—			15,317
Impairment (charge) / recovery	688			2,543			(318		)	(21,093		)
Amortization and other	(6,995		)	(7,194		)	(19,817		)	(18,785		)
Carrying value, end of period	$	183,025		$	144,392		$	183,025		$	144,392
Fair value, end of period	$	183,583		$	144,623		$	183,583		$	144,623
Weighted-average life (years)	7.0			6.1			7.0			6.1

MSRs do not trade in an active, open market with readily-observable prices. While sales of MSRs occur, the precise terms and conditions are typically not readily available. Therefore, the fair value of MSRs is estimated using a discounted future cash flow model. The model considers portfolio characteristics, contractually-specified servicing fees and assumptions related to prepayments, delinquency rates, late charges, other ancillary revenues, costs to service, and other economic factors. Changes in the assumptions used may have a significant impact on the valuation of MSRs.

MSR values are sensitive to movements in interest rates, as expected future net servicing income depends on the projected outstanding principal balances of the underlying loans, which can be greatly impacted by the level of prepayments. Huntington hedges the value of the MSRs against changes in value attributable to changes in interest rates using a combination of derivative instruments and trading securities.

For MSRs under the fair value method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	12.10	%	$	(472	)	$	(910	)	10.90	%	$	(501	)	$	(970	)
Spread over forward interest rate swap rates	813	bps	(436		)	(823		)	536	bps	(454		)	(879		)

For MSRs under the amortization method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	8.40	%	$	(5,172	)	$	(10,038	)	7.80	%	$	(4,510	)	$	(8,763	)
Spread over forward interest rate swap rates	1,041	bps	(6,866		)	(12,934		)	1,173	bps	(5,259		)	(10,195		)

Total servicing, late and other ancillary fees included in mortgage banking income amounted to $14 million and $13 million for the three-month periods ended September 30, 2017 and 2016. For the nine-month periods ended September 30, 2017 and 2016, total net servicing fees included in mortgage banking income were $42 million and $36 million. The unpaid principal balance of residential mortgage loans serviced for third parties was $19.3 billion and $18.9 billion at September 30, 2017 and December 31, 2016, respectively.

Automobile Loans

Huntington has retained servicing responsibilities on sold automobile loans and receives annual servicing fees and other ancillary fees on the outstanding loan balances. Automobile loan servicing rights are accounted for using the amortization method. A servicing asset is established at fair value at the time of the sale. The servicing asset is then amortized against servicing income. Impairment, if any, is recognized when carrying value exceeds the fair value as determined by calculating the present value of expected net future cash flows. The primary risk characteristic for measuring servicing assets is payoff rates of the underlying loan pools. Valuation calculations rely on the predicted payoff assumption and, if actual payoff is quicker than expected, then future value would be impaired

Changes in the carrying value of automobile loan servicing rights for the three-month and nine-month periods ended September 30, 2017 and 2016, and the fair value at the end of each period were as shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	12,524		$	5,458		$	18,285		$	8,771
Amortization and other	(2,338		)	(1,087		)	(8,099		)	(4,400		)
Carrying value, end of period	$	10,186		$	4,371		$	10,186		$	4,371
Fair value, end of period	$	10,398		$	4,366		$	10,398		$	4,366
Weighted-average contractual life (years)	3.7			3.2			3.7			3.2

A summary of key assumptions and the sensitivity of the automobile loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	23.66	%	$	(586	)	$	(1,112	)	19.98	%	$	(1,047	)	$	(2,026	)
Spread over forward interest rate swap rates	500	bps	(14		)	(27		)	500	bps	(26		)	(53		)

Servicing income amounted to $4 million and $2 million for the three-month periods ending September 30, 2017, and 2016. For the nine-month periods ended September 30, 2017 and 2016, total servicing income was $14 million and $6 million, respectively. The unpaid principal balance of automobile loans serviced for third parties was $1.2 billion and $1.7 billion at September 30, 2017 and December 31, 2016, respectively.

Small Business Administration (SBA) Portfolio

The following table summarizes activity relating to SBA loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
SBA loans sold with servicing retained	$	107,259	$	62,803	$	272,635	$	167,321
Pretax gains resulting from above loan sales (1)	8,508		4,679		21,435		12,862

(1) Recorded in gain on sale of loans.

Huntington has retained servicing responsibilities on sold SBA loans and receives annual servicing fees on the outstanding loan balances. SBA loan servicing rights are accounted for using the amortization method. A servicing asset is established at fair value at the time of the sale using a discounted future cash flow model. The servicing asset is then amortized against servicing income. Impairment, if any, is recognized when carrying value exceeds the fair value as determined by calculating the present value of expected net future cash flows.

The following tables summarize the changes in the carrying value of the servicing asset for the three-month and nine-month periods ended September 30, 2017 and 2016. The fair value at the end of each period is shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	23,113		$	19,612		$	21,080		$	19,747
New servicing assets created	3,591			1,879			9,187			5,259
Amortization and other	(1,923		)	(1,745		)	(5,486		)	(5,260		)
Carrying value, end of period	$	24,781		$	19,746		$	24,781		$	19,746
Fair value, end of period	$	28,822		$	24,065		$	28,822		$	24,065
Weighted-average life (years)	3.3			3.3			3.3			3.3

A summary of key assumptions and the sensitivity of the SBA loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	7.50	%	$	(385	)	$	(764	)	7.40	%	$	(324	)	$	(644	)
Discount rate	15.00		(774		)	(1,516		)	15.00		(1,270		)	(1,870		)

Servicing income amounted to $3 million and $2 million for the three-month periods ending September 30, 2017, and 2016, respectively. For the nine-month periods ended September 30, 2017 and 2016, total servicing income was $8 million and $7 million, respectively. The unpaid principal balance of SBA loans serviced for third parties was $1.3 billion and $1.1 billion at September 30, 2017 and December 31, 2016, respectively.

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LONG-TERM DEBT

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBT

In March 2017, the Bank issued $0.7 billion of senior notes at 99.994% of face value. The senior notes mature on March 10, 2020 and have a fixed coupon rate of 2.375%. The senior notes may be redeemed one month prior to the maturity date at 100% of principal plus accrued and unpaid interest. Also, in March 2017, the Bank issued $0.3 billion of senior notes at 100% of face value. The senior notes mature on March 10, 2020 and have a variable coupon rate of three month LIBOR + 51 basis points.

In August 2017, the Bank issued $0.7 billion of senior notes at 99.762% of face value. The senior notes mature on August 7, 2022 and have a fixed coupon rate of 2.50%. The senior notes may be redeemed one month prior to the maturity date at 100% of principal plus accrued and unpaid interest.

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OTHER COMPREHENSIVE INCOME

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

OTHER COMPREHENSIVE INCOME

OTHER COMPREHENSIVE INCOME

The components of other comprehensive income for the three-month and nine-month periods ended September 30, 2017 and 2016, were as shown in the following table.

	Three Months Ended September 30, 2017
				Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	410		$	(145	)	$	265
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(42,429		)	14,828			(27,601		)
Less: Reclassification adjustment for net losses (gains) included in net income	8,715			(3,082		)	5,633
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(33,304		)	11,601			(21,703		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,885			(660		)	1,225
Less: Reclassification adjustment for net (gains) losses included in net income	144			(51		)	93
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,029			(711		)	1,318
Net change in pension and other post-retirement obligations	1,198			(419		)	779
Total other comprehensive income (loss)	$	(30,077	)	$	10,471		$	(19,606	)

	Three Months Ended September 30, 2016
	Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	2,002		$	(708	)	$	1,294
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(54,109		)	18,604			(35,505		)
Less: Reclassification adjustment for net losses (gains) included in net income	726			(257		)	469
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(51,381		)	17,639			(33,742		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	(8,171		)	2,860			(5,311		)
Less: Reclassification adjustment for net (gains) losses included in net income	123			(44		)	79
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	(8,048		)	2,816			(5,232		)
Net change in pension and other post-retirement obligations	1,293			(452		)	841
Total other comprehensive income (loss)	$	(58,136	)	$	20,003		$	(38,133	)

	Nine Months Ended September 30, 2017
			Tax (expense)
(dollar amounts in thousands)	Pretax		Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	3,698	$	(1,307	)	$	2,391
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	19,853		(6,779		)	13,074
Less: Reclassification adjustment for net losses (gains) included in net income	18,577		(6,570		)	12,007
Net change in unrealized holding gains (losses) on available-for-sale debt securities	42,128		(14,656		)	27,472
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,274		(446		)	828
Less: Reclassification adjustment for net (gains) losses included in net income	1,131		(396		)	735
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,405		(842		)	1,563
Net change in pension and other post-retirement obligations	3,104		(1,086		)	2,018
Total other comprehensive income (loss)	$	47,637	$	(16,584	)	$	31,053

	Nine Months Ended September 30, 2016
	Tax (expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	(600	)	$	212		$	(388	)
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	76,637			(28,315		)	48,322
Less: Reclassification adjustment for net losses (gains) included in net income	(2,032		)	718			(1,314		)
Net change in unrealized holding gains (losses) on available-for-sale debt securities	74,005			(27,385		)	46,620
Net change in unrealized holding gains (losses) on available-for-sale equity securities	170			(60		)	110
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	8,047			(2,816		)	5,231
Less: Reclassification adjustment for net (gains) losses included in net income	(769		)	269			(500		)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	7,278			(2,547		)	4,731
Net change in pension and other post-retirement obligations	3,879			(1,357		)	2,522
Total other comprehensive income (loss)	$	85,332		$	(31,349	)	$	53,983

The following table presents activity in accumulated other comprehensive income (loss), net of tax, for the nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Unrealized gains and (losses) on debt securities (1)			Unrealized gains and (losses) on equity securities		Unrealized gains and (losses) on cash flow hedging derivatives			Unrealized gains (losses) for pension and other post- retirement obligations			Total
December 31, 2015	$	8,361		$	176	$	(3,948	)	$	(230,747	)	$	(226,158	)
Other comprehensive income before reclassifications	47,934			110		5,231			—			53,275
Amounts reclassified from accumulated OCI to earnings	(1,314		)	—		(500		)	2,522			708
Period change	46,620			110		4,731			2,522			53,983
September 30, 2016	$	54,981		$	286	$	783		$	(228,225	)	$	(172,175	)
December 31, 2016	$	(192,764	)	$	287	$	(2,634	)	$	(205,905	)	$	(401,016	)
Other comprehensive income before reclassifications	15,465			—		828			—			16,293
Amounts reclassified from accumulated OCI to earnings	12,007			—		735			2,018			14,760
Period change	27,472			—		1,563			2,018			31,053
September 30, 2017	$	(165,292	)	$	287	$	(1,071	)	$	(203,887	)	$	(369,963	)

(1) Amounts at September 30, 2017 and December 31, 2016 include $97 million and $82 million, respectively, of net unrealized gains on securities transferred from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The net unrealized gains will be recognized in earnings over the remaining life of the security using the effective interest method.

The following table presents the reclassification adjustments out of accumulated OCI included in net income and the impacted line items as listed on the Unaudited Condensed Consolidated Statements of Income for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Three Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(1,498	)	$	(726	)	Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,113		)	—			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(104		)	—			Noninterest income - net gains (losses) on sale of securities
	(8,715		)	(726		)	Total before tax
	3,082			257			Tax (expense) benefit
	$	(5,633	)	$	(469	)	Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(144	)	$	(123	)	Interest income - loans and leases
Interest rate contracts	—			—			Noninterest income - other income
	(144		)	(123		)	Total before tax
	51			44			Tax (expense) benefit
	$	(93	)	$	(79	)	Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(1,690	)	$	(1,785	)	Noninterest expense - personnel costs
Prior service credit	492			492			Noninterest expense - personnel costs
	(1,198		)	(1,293		)	Total before tax
	419			452			Tax (expense) benefit
	$	(779	)	$	(841	)	Net of tax

	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Nine Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(7,388	)	$	478		Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,502		)	1,630			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(3,687		)	(76		)	Noninterest income - net gains (losses) on sale of securities
	(18,577		)	2,032			Total before tax
	6,570			(718		)	Tax (expense) benefit
	$	(12,007	)	$	1,314		Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(1,131	)	$	770		Interest income - loans and leases
Interest rate contracts	—			(1		)	Noninterest income - other income
	(1,131		)	769			Total before tax
	396			(269		)	Tax (expense) benefit
	$	(735	)	$	500		Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(4,580	)	$	(5,355	)	Noninterest expense - personnel costs
Prior service credit	1,476			1,476			Noninterest expense - personnel costs
	(3,104		)	(3,879		)	Total before tax
	1,086			1,357			Tax (expense) benefit
	$	(2,018	)	$	(2,522	)	Net of tax

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EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

Basic earnings per share is the amount of earnings (adjusted for dividends declared on preferred stock) available to each share of common stock outstanding during the reporting period. Diluted earnings per share is the amount of earnings available to each share of common stock outstanding during the reporting period adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include incremental shares issued for stock options, restricted stock units and awards, distributions from deferred compensation plans, and the conversion of the Company’s convertible preferred stock. Potentially dilutive common shares are excluded from the computation of diluted earnings per share during periods in which the effect would be antidilutive. For diluted earnings per share, net income available to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would be dilutive, net income available to common shareholders is adjusted by the associated preferred dividends and deemed dividend.

The calculation of basic and diluted earnings per share for the three and nine-month periods ended September 30, 2017 and 2016, was as shown in the table.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands, except per share amounts)	2017			2016			2017			2016
Basic earnings per common share:
Net income	$	274,568		$	127,004		$	754,403		$	472,858
Preferred stock dividends	(18,903		)	(18,537		)	(56,670		)	(46,409		)
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Basic earnings per common share	$	0.24		$	0.12		$	0.64		$	0.51
Diluted earnings per common share:
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Effect of assumed preferred stock conversion	—			—			—			—
Net income applicable to diluted earnings per share	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Dilutive potential common shares:
Stock options and restricted stock units and awards	17,079			10,714			17,515			10,295
Shares held in deferred compensation plans	3,228			2,654			3,096			2,337
Other	146			135			152			135
Dilutive potential common shares	20,453			13,503			20,763			12,767
Total diluted average common shares issued and outstanding	1,106,491			952,081			1,107,878			856,934
Diluted earnings per common share	$	0.23		$	0.11		$	0.63		$	0.50

For the three-month periods ended September 30, 2017 and 2016, approximately 1.5 million and 3.5 million, respectively, of options to purchase shares of common stock were not included in the computation of diluted earnings per share because the effect would be antidilutive. For the nine-month periods ended September 30, 2017 and 2016, approximately 0.9 million and 3.3 million, respectively, were not included.

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BENEFIT PLANS

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

BENEFIT PLANS

. BENEFIT PLANS

Huntington sponsors a non-contributory defined benefit pension plan covering substantially all employees hired or rehired prior to January 1, 2010. The plan, which was modified in 2013 and no longer accrues service benefits to participants, provides benefits based upon length of service and compensation levels. The funding policy of Huntington is to contribute an annual amount that is at least equal to the minimum funding requirements but not more than the amount deductible under the Internal Revenue Code. There is no required minimum contribution for 2017.

In addition, Huntington has a defined benefit post-retirement plan that provides certain healthcare and life insurance benefits to retired employees who have attained the age of 55 and have at least 10 years of vesting service under this plan.

As part of the FirstMerit acquisition, Huntington agreed to assume and honor all FirstMerit benefit plans. The FirstMerit Pension Plan was frozen for nonvested employees and closed to new entrants after December 31, 2006. Effective December 31, 2012, the FirstMerit Pension Plan was frozen for vested employees. Additionally, FirstMerit had a post-retirement benefit plan which provided medical and life insurance for retired employees.

For additional information on benefit plans, see the Benefit Plan footnote in our 2016 Form 10-K.

The following table shows the components of net periodic (benefit) cost for all plans.

	Pension Benefits						Post-Retirement Benefits
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	640		$	1,425		$	22		$	16
Interest cost	7,478			7,978			98			79
Expected return on plan assets	(13,803		)	(12,086		)	—			—
Amortization of prior service cost	—			—			(492		)	(492		)
Amortization of (gain) loss	1,747			1,865			(55		)	(72		)
Settlements	5,049			3,400			—			—
Net periodic (benefit) cost	$	1,111		$	2,582		$	(427	)	$	(469	)

	Pension Benefits						Post-Retirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	1,920		$	3,475		$	65		$	16
Interest cost	22,433			21,474			296			188
Expected return on plan assets	(41,409		)	(32,533		)	—			—
Amortization of prior service cost	—			—			(1,476		)	(1,476		)
Amortization of (gain) loss	5,241			5,594			(164		)	(216		)
Settlements	10,049			10,200			—			—
Net periodic (benefit) cost	$	(1,766	)	$	8,210		$	(1,279	)	$	(1,488	)

Huntington has a defined contribution plan that is available to eligible employees. Huntington matches participant contributions, up to the first 4% of base pay that is contributed to the defined contribution plan. For 2016, a discretionary profit-sharing contribution equal to 1% of eligible participants’ 2016 base pay was awarded during the 2017 first quarter. Huntington's expense related to the defined contribution plans during the third quarter2017 and 2016 was $5 million and $9 million, respectively. For the nine-month periods ended September 30, 2017 and 2016, expense related to the defined contribution plans was $26 million and $26 million, respectively.

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FAIR VALUES OF ASSETS AND LIABILITIES

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

FAIR VALUES OF ASSETS AND LIABILITIES

See Note 18 “Fair Value of Assets and Liabilities” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for a description of additional 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 three-month and nine-month periods ended September 30, 2017 and 2016.

Assets and Liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis at September 30, 2017 and December 31, 2016 are summarized in the table below.

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	584,829	$	—	$	—		$	584,829
Loans held for investment	—		58,708		40,483		—			99,191
Trading account securities:
U.S. Treasury securities	25		—		—		—			25
Municipal securities	—		1,481		—		—			1,481
Other securities	86,982		—		—		—			86,982
	87,007		1,481		—		—			88,488
Available-for-sale and other securities:
U.S. Treasury securities	11,260		—		—		—			11,260
Federal agencies: Mortgage-backed	—		10,639,750		—		—			10,639,750
Federal agencies: Other agencies	—		96,451		—		—			96,451
Municipal securities	—		468,082		2,958,027		—			3,426,109
Asset-backed securities	—		531,064		24,127		—			555,191
Corporate debt	—		125,629		—		—			125,629
Other securities	11,717		3,935		—		—			15,652
	22,977		11,864,911		2,982,154		—			14,870,042
MSRs	—		—		11,753		—			11,753
Derivative assets	—		312,401		8,425		(154,562		)	166,264
Liabilities
Derivative liabilities	—		288,191		5,459		(234,526		)	59,124
Short-term borrowings	4		—		—		—			4

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	438,224	$	—	$	—		$	438,224
Loans held for investment	—		34,439		47,880		—			82,319
Trading account securities:
Municipal securities	—		1,148		—		—			1,148
Other securities	132,147		—		—		—			132,147
	132,147		1,148		—		—			133,295
Available-for-sale and other securities:
U.S. Treasury securities	5,497		—		—		—			5,497
Federal agencies: Mortgage-backed	—		10,673,342		—		—			10,673,342
Federal agencies: Other agencies	—		73,542		—		—			73,542
Municipal securities	—		452,013		2,798,044		—			3,250,057
Asset-backed securities	—		717,478		76,003		—			793,481
Corporate debt	—		198,683		—		—			198,683
Other securities	16,588		3,943		—		—			20,531
	22,085		12,119,001		2,874,047		—			15,015,133
MSRs	—		—		13,747		—			13,747
Derivative assets	—		414,412		5,747		(181,940		)	238,219
Liabilities
Derivative liabilities	—		362,777		7,870		(272,361		)	98,286
Short-term borrowings	474		—		—		—			474

(1) Amounts represent the impact of legally enforceable master netting agreements that allow the Company to settle positive and negative positions and cash collateral held or placed with the same counterparties.

The tables below present a rollforward of the balance sheet amounts for the three-month and nine-month periods ended September 30, 2017 and 2016, for financial instruments measured on a recurring basis and classified as Level 3. The classification of an item as Level 3 is based on the significance of the unobservable inputs to the overall fair value measurement. However, Level 3 measurements may also include observable components of value that can be validated externally. Accordingly, the gains and losses in the table below include changes in fair value due in part to observable factors that are part of the valuation methodology.

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	12,528		$	3,178		$	2,872,007		$	42,575		$	43,855
Transfers out of Level 3 (1)	—			(1,376		)	—			—			—
Total gains/losses for the period:
Included in earnings	(775		)	1,164			(637		)	(1,569		)	187
Included in OCI	—			—			(33,781		)	5,166			—
Purchases/originations	—			—			166,514			—			—
Sales	—			—			(90		)	(21,625		)	—
Repayments	—			—			—			—			(3,559		)
Settlements	—			—			(45,986		)	(420		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(775	)	$	1,164		$	(104	)	$	—		$	—

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,105		$	12,751		$	2,237,975		$	71,379		$	925
Transfers out of Level 3 (1)	—			(1,692		)	—			—			—
Total gains/losses for the period:
Included in earnings	(677		)	(2,459		)	4,166			—			(249		)
Included in OCI	—			—			(28,272		)	2,875			—
Purchases/originations	—			—			953,639			10			56,469
Sales	—			—						—			—
Repayments	—			—			—			—			(3,860		)
Settlements	—			—			(262,235		)	(445		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(677	)	$	(2,459	)	$	—		$	—		$	—

(1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that were transferred to loans held for sale, which are classified as Level 2.

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,747		$	(2,123	)	$	2,798,044		$	76,003		$	47,880
Transfers out of Level 3 (1)	—			(3,833		)	—			—			—
Total gains/losses for the period:
Included in earnings	(1,994		)	8,922			(3,612		)	(5,097		)	1,617
Included in OCI	—			—			(887		)	13,936			—
Purchases/originations	—			—			414,123			—			—
Sales	—			—			(90		)	(59,353		)	—
Repayments	—			—			—			—			(9,014		)
Settlements	—			—			(249,551		)	(1,362		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(1,994	)	$	8,922		$	(128	)	$	(3,559	)	$	—

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset- backed securities			Loans held for investment
Opening balance	$	17,585		$	6,056		$	2,095,551		$	100,337		$	1,748
Transfers out of Level 3 (1)	—			(5,115		)	—			—			—
Total gains/losses for the period:
Included in earnings	(5,157		)	7,659			4,166			2			(249		)
Included in OCI	—			—			(8,946		)	3,549			—
Purchases/originations	—			—			1,237,546			10			56,469
Sales	—			—			(36,657		)	(27,794		)	—
Repayments	—			—			—			—			(4,683		)
Settlements	—			—			(386,387		)	(2,285		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(5,157	)	$	7,759		$	—		$	2		$	—

(1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that were transferred to loans held for sale, which are classified as Level 2.

The tables below summarize the classification of gains and losses due to changes in fair value, recorded in earnings for Level 3 assets and liabilities for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(775	)	$	1,164	$	—		$	—		$	—
Securities gains (losses)	—			—		(104		)	(1,569		)	—
Interest and fee income	—			—		(533		)	—			—
Noninterest income	—			—		—			—			187
Total	$	(775	)	$	1,164	$	(637	)	$	(1,569	)	$	187

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(677	)	$	(2,459	)	$	—	$	—	$	—
Securities gains (losses)	—			—			—		—		—
Interest and fee income	—			—			—		—		—
Noninterest income	—			—			4,166		—		(249		)
Total	$	(677	)	$	(2,459	)	$	4,166	$	—	$	(249	)

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(1,994	)	$	8,922	$	—		$	—		$	—
Securities gains (losses)	—			—		(128		)	(5,100		)	—
Interest and fee income	—			—		(3,484		)	3			—
Noninterest income	—			—		—			—			1,617
Total	$	(1,994	)	$	8,922	$	(3,612	)	$	(5,097	)	$	1,617

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(5,157	)	$	7,659	$	—	$	—	$	—
Securities gains (losses)	—			—		—		—		—
Interest and fee income	—			—		—		—		—
Noninterest income	—			—		4,166		2		(249		)
Total	$	(5,157	)	$	7,659	$	4,166	$	2	$	(249	)

Assets and liabilities under the fair value option

The following table presents the fair value and aggregate principal balance of certain assets and liabilities under the fair value option.

	September 30, 2017
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	584,829	$	564,106	$	20,723		$	602	$	608	$	(6	)
Loans held for investment	99,191		107,997		(8,806		)	10,086		11,781		(1,695		)

	December 31, 2016
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	438,224	$	433,760	$	4,464		$	—	$	—	$	—
Loans held for investment	82,319		91,998		(9,679		)	8,408		11,082		(2,674		)

The following tables present the net gains (losses) from fair value changes for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Net gains (losses) from fair value changes						Net gains (losses) from fair value changes
	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017		2016
Assets
Loans held for sale	$	(1,897	)	$	(4,439	)	$	11,719	$	9,080
Loans held for investment	187			—			1,617		—

Assets and Liabilities measured at fair value on a nonrecurring basis

Certain assets and liabilities may be required to be measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition. These assets and liabilities are not measured at fair value on an ongoing basis; however, they are subject to fair value adjustments in certain circumstances, such as when there is evidence of impairment. For the nine months ended September 30, 2017, assets measured at fair value on a nonrecurring basis were as shown in the table below.

			Fair Value Measurements Using
(dollar amounts in thousands)	Fair Value		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total Gains/(Losses) Nine Months Ended September 30, 2017
MSRs	$	182,043	$	—	$	—	$	182,043	$	(318	)
Impaired loans	68,159		—		—		68,159		(3,976		)
Other real estate owned	42,041		—		—		42,041		(1,759		)

MSRs accounted for under the amortization method are subject to nonrecurring fair value measurement when the fair value is lower than the carrying amount.

Periodically, Huntington records nonrecurring adjustments of collateral-dependent loans measured for impairment when establishing the ACL. Such amounts are generally based on the fair value of the underlying collateral supporting the loan. Appraisals are generally obtained to support the fair value of the collateral and incorporate measures such as recent sales prices for comparable properties and cost of construction. In cases where the carrying value exceeds the fair value of the collateral less cost to sell, an impairment charge is recognized.

Other real estate-owned properties are included in accrued income and other assets and valued based on appraisals and third-party price opinions, less estimated selling costs.

Significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis

The table below presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at September 30, 2017 and December 31, 2016:

	Quantitative Information about Level 3 Fair Value Measurements at September 30, 2017
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	11,753	Discounted cash flow	Constant prepayment rate	9.0% - 31.0% (12%)
				Spread over forward interest rate swap rates	8.0% - 10.0% (8.1%)
Derivative assets	8,425		Consensus Pricing	Net market price	-4.0% - 21.4% (1.8%)
Derivative liabilities	5,459			Estimated Pull through %	11.0% - 99.0% (79.0%)
Municipal securities	2,958,027		Discounted cash flow	Discount rate	0.0% - 10.3% (4.0%)
				Cumulative default	0.0% - 42.0% (4.9%)
				Loss given default	5.0% - 80.0% (23.7%)
Asset-backed securities	24,127		Discounted cash flow	Discount rate	1.3% - 6.8% (6.5%)
				Cumulative prepayment rate	0.0% - 72% (7.3%)
				Cumulative default	2.9% - 100% (8.6%)
				Loss given default	90% - 100% (97.8%)
Loans held for investment	40,483		Discounted cash flow	Discount rate	7.0% - 17.7% (8.2%)
Measured at fair value on a nonrecurring basis:
MSRs	182,043		Discounted cash flow	Constant prepayment rate	6.0% - 21.0% (8%)
				Spread over forward interest rate swap rates	1.8% - 20.0% (10.4%)
Impaired loans	68,159		Appraisal value	NA	NA
Other real estate owned	42,041		Appraisal value	NA	NA

	Quantitative Information about Level 3 Fair Value Measurements at December 31, 2016
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	13,747	Discounted cash flow	Constant prepayment rate	5.63% - 34.4% (10.9%)
				Spread over forward interest rate swap rates	3.0% - 9.2% (5.4%)
Derivative assets	5,747		Consensus Pricing	Net market price	-7.1% - 25.4% (1.1%)
Derivative liabilities	7,870			Estimated Pull through %	8.1% - 99.8% (76.9%)
Municipal securities	2,798,044		Discounted cash flow	Discount rate	0.0% - 10.0% (3.6%)
				Cumulative default	0.3% - 37.8% (4.0%)
				Loss given default	5.0% - 80.0% (24.1%)
Asset-backed securities	76,003		Discounted cash flow	Discount rate	5.0% - 12.0% (6.3%)
				Cumulative prepayment rate	0.0% - 73% (6.5%)
				Cumulative default	1.1% - 100% (11.2%)
				Loss given default	85% - 100% (96.3%)
				Cure given deferral	0.0% - 75.0% (36.2%)
Loans held for investment	47,880		Discounted cash flow	Discount rate	5.4% - 16.2% (5.6%)
Measured at fair value on a nonrecurring basis:
MSRs	171,309		Discounted cash flow	Constant prepayment rate	5.57% - 30.4% (7.8%)
				Spread over forward interest rate swap rates	4.2% - 20.0% (11.7%)
Impaired loans	53,818		Appraisal value	NA	NA
Other real estate owned	50,930		Appraisal value	NA	NA

The following provides a general description of the impact of a change in an unobservable input on the fair value measurement and the interrelationship between unobservable inputs, where relevant/significant. Interrelationships may also exist between observable and unobservable inputs. Such relationships have not been included in the discussion below.

A significant change in the unobservable inputs may result in a significant change in the ending fair value measurement of Level 3 instruments. In general, prepayment rates increase when market interest rates decline and decrease when market interest rates rise and higher prepayment rates generally result in lower fair values for MSR assets and Asset-backed securities.

Credit loss estimates, such as probability of default, constant default, cumulative default, loss given default, cure given deferral, and loss severity, are driven by the ability of the borrowers to pay their loans and the value of the underlying collateral and are impacted by changes in macroeconomic conditions, typically increasing when economic conditions worsen and decreasing when conditions improve. An increase in the estimated prepayment rate typically results in a decrease in estimated credit losses and vice versa. Higher credit loss estimates generally result in lower fair values. Credit spreads generally increase when liquidity risks and market volatility increase and decrease when liquidity conditions and market volatility improve.

Discount rates and spread over forward interest rate swap rates typically increase when market interest rates increase and/or credit and liquidity risks increase and decrease when market interest rates decline and/or credit and liquidity conditions improve. Higher discount rates and credit spreads generally result in lower fair market values.

Net market price and pull through percentages generally increase when market interest rates increase and decline when market interest rates decline. Higher net market price and pull through percentages generally result in higher fair values.

Fair values of financial instruments

The following table provides the carrying amounts and estimated fair values of Huntington’s financial instruments that are carried either at fair value or cost at September 30, 2017 and December 31, 2016:

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and short-term assets	$	1,243,828	$	1,243,828	$	1,443,037	$	1,443,037
Trading account securities	88,488		88,488		133,295		133,295
Loans held for sale	651,734		657,270		512,951		515,640
Available-for-sale and other securities	15,453,061		15,453,061		15,562,837		15,562,837
Held-to-maturity securities	8,688,399		8,655,805		7,806,939		7,787,268
Net loans and direct financing leases	67,911,810		67,698,855		66,323,583		66,294,639
Derivatives	166,264		166,264		238,219		238,219
Financial Liabilities
Deposits	78,445,113		78,422,971		75,607,717		76,161,091
Short-term borrowings	1,829,549		1,829,549		3,692,654		3,692,654
Long-term debt	9,200,707		9,402,926		8,309,159		8,387,444
Derivatives	59,124		59,124		98,286		98,286

The following table presents the level in the fair value hierarchy for the estimated fair values of only Huntington’s financial instruments that are not already on the Unaudited Condensed Consolidated Balance Sheets at fair value at September 30, 2017 and December 31, 2016:

	Estimated Fair Value Measurements at Reporting Date Using						September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	8,655,805	$	—	$	8,655,805
Net loans and direct financing leases	—		—		67,698,855		67,698,855
Financial Liabilities
Deposits	—		75,230,127		3,192,844		78,422,971
Short-term borrowings	4		—		1,829,545		1,829,549
Long-term debt	—		8,992,820		410,106		9,402,926

	Estimated Fair Value Measurements at Reporting Date Using						December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	7,787,268	$	—	$	7,787,268
Net loans and direct financing leases	—		—		66,294,639		66,294,639
Financial Liabilities
Deposits	—		72,319,328		3,841,763		76,161,091
Short-term borrowings	474		—		3,692,180		3,692,654
Long-term debt	—		7,980,176		407,268		8,387,444

The short-term nature of certain assets and liabilities result in their carrying value approximating fair value. These include trading account securities, customers’ acceptance liabilities, short-term borrowings, bank acceptances outstanding, FHLB advances, and cash and short-term assets, which include cash and due from banks, interest-bearing deposits in banks, and federal funds sold and securities purchased under resale agreements. Loan commitments and letters-of-credit generally have short-term, variable-rate features and contain clauses that limit Huntington’s exposure to changes in customer credit quality. Accordingly, their carrying values, which are immaterial at the respective balance sheet dates, are reasonable estimates of fair value.

Certain assets, the most significant being operating lease assets, bank owned life insurance, and premises and equipment, do not meet the definition of a financial instrument and are excluded from this disclosure. Similarly, mortgage and nonmortgage servicing rights, deposit base, and other customer relationship intangibles are not considered financial instruments and are not included above. Accordingly, this fair value information is not intended to, and does not, represent Huntington’s underlying value. Many of the assets and liabilities subject to the disclosure requirements are not actively traded, requiring fair values to be estimated by Management. These estimations necessarily involve the use of judgment about a wide variety of factors, including but not limited to, relevancy of market prices of comparable instruments, expected future cash flows, and appropriate discount rates.

The following methods and assumptions were used by Huntington to estimate the fair value of the remaining classes of financial instruments:

Held-to-maturity securities

Fair values are determined by using models that are based on security-specific details, as well as relevant industry and economic factors. The most significant of these inputs are quoted market prices, and interest rate spreads on relevant benchmark securities.

Loans and Direct Financing Leases

Variable-rate loans that reprice frequently are based on carrying amounts, as adjusted for estimated credit losses. The fair values for other loans and leases are estimated using discounted cash flow analyses and employ interest rates currently being offered for loans and leases with similar terms. The rates take into account the position of the yield curve, as well as an adjustment for prepayment risk, operating costs, and profit. This value is also reduced by an estimate of expected losses and the credit risk associated in the loan and lease portfolio. The valuation of the loan portfolio reflected discounts that Huntington believed are consistent with transactions occurring in the marketplace.

Deposits

Demand deposits, savings accounts, and money market deposits are, by definition, equal to the amount payable on demand. The fair values of fixed-rate time deposits are estimated by discounting cash flows using interest rates currently being offered on certificates with similar maturities.

Debt

Long-term debt is based upon quoted market prices, which are inclusive of Huntington’s credit risk. In the absence of quoted market prices, discounted cash flows using market rates for similar debt with the same maturities are used in the determination of fair value.

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DERIVATIVE FINANCIAL INSTRUMENTS

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

DERIVATIVE FINANCIAL INSTRUMENTS

Derivative financial instruments are recorded in the Unaudited Condensed Consolidated Balance Sheets as either an asset or a liability (in accrued income and other assets or accrued expenses and other liabilities, respectively) and measured at fair value.

The following table presents the fair values of all derivative instruments included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016. Amounts in the table below are presented gross without the impact of any net collateral arrangements.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Derivatives designated as Hedging Instruments
Interest rate contracts	$	32,837	$	93,224	$	46,440	$	99,996
Derivatives not designated as Hedging Instruments
Interest rate contracts (1)	198,471		112,534		232,653		140,475
Foreign exchange contracts	22,354		21,020		23,265		19,576
Commodities contracts	66,133		61,695		108,026		104,328
Equity contracts	1,031		5,177		9,775		6,272
Total Contracts	$	320,826	$	293,650	$	420,159	$	370,647

(1) Includes derivative assets and liabilities used in mortgage banking activities.

Derivatives used in asset and liability management activities

Huntington engages in balance sheet hedging activity, principally for asset and liability management purposes, to convert fixed rate assets or liabilities into floating rate, or vice versa. Balance sheet hedging activity is arranged to receive hedge accounting treatment and is classified as either fair value or cash flow hedges. Fair value hedges are purchased to convert subordinated and other long-term debt from fixed-rate obligations to floating rate. Cash flow hedges are also used to convert floating rate loans into fixed rate loans.

The following table presents the gross notional values of derivatives used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016, identified by the underlying interest rate-sensitive instruments.

	September 30, 2017
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	1,325,000	$	1,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	7,425,000		—		7,425,000
Total notional value at September 30, 2017	$	8,375,000	$	1,325,000	$	9,700,000
	December 31, 2016
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	3,325,000	$	3,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	6,525,000		—		6,525,000
Total notional value at December 31, 2016	$	7,475,000	$	3,325,000	$	10,800,000

The following table presents additional information about the interest rate swaps used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016.

	September 30, 2017
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	1,325,000	0.1	$	(1,239	)	0.72	%	1.23	%
Liability conversion swaps
Receive fixed—generic	8,375,000		2.8	(59,148		)	1.56		1.29
Total swap portfolio at September 30, 2017	$	9,700,000	2.3	$	(60,387	)
	December 31, 2016
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	3,325,000	0.6	$	(2,060	)	1.04	%	0.91	%
Liability conversion swaps
Receive fixed—generic	7,475,000		3.1	(51,496		)	1.49		0.88
Total swap portfolio at December 31, 2016	$	10,800,000	2.3	$	(53,556	)

These derivative financial instruments are entered into to manage the interest rate risk of assets and liabilities. Consequently, net amounts receivable or payable on contracts hedging either interest-earning assets or interest-bearing liabilities are an adjustment to either interest income or interest expense. The net amounts resulted in an increase to net interest income of $3 million and $18 million for the three-month periods ended September 30, 2017, and 2016, respectively. For the nine-month periods ended September 30, 2017, and 2016, the net amounts resulted in an increase to net interest income of $20 million and $58 million, respectively.

Fair Value Hedges

The changes in fair value of the fair value hedges are, to the extent that the hedging relationship is effective, recorded through earnings and offset against changes in the fair value of the hedged item.

The following table presents the change in fair value for derivatives designated as fair value hedges as well as the offsetting change in fair value on the hedged item for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Interest rate contracts
Change in fair value of interest rate swaps hedging deposits (1)	$	—		$	—		$	—		$	(82	)
Change in fair value of hedged deposits (1)	—			—			—			72
Change in fair value of interest rate swaps hedging subordinated notes (2)	(2,234		)	(9,688		)	(4,665		)	(2,880		)
Change in fair value of hedged subordinated notes (2)	3,615			10,400			6,782			3,591
Change in fair value of interest rate swaps hedging other long-term debt (2)	(6,431		)	(45,870		)	(880		)	37,179
Change in fair value of hedged other long-term debt (2)	7,152			42,647			(1,226		)	(38,187		)

(1) Effective portion of the hedging relationship is recognized in Interest expense—deposits in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

(2) Effective portion of the hedging relationship is recognized in Interest expense—subordinated notes and other long-term debt in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

Cash Flow Hedges

To the extent derivatives designated as cash flow hedges are effective in offsetting the variability of the hedged cash flows, changes in the derivatives’ fair value will not be included in current earnings but are reported as a component of OCI in the Unaudited Condensed Consolidated Statements of Changes in Shareholders’ Equity. These changes in fair value will be included in earnings of future periods when earnings are also affected by the changes in the hedged cash flows. To the extent these derivatives are not effective, changes in their fair values are immediately included in noninterest income.

The following table presents the gains and (losses) recognized in OCI and the location in the Unaudited Condensed Consolidated Statements of Income of gains and (losses) reclassified from OCI into earnings for derivatives designated as effective cash flow hedges for the three-month and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)					Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017		2016				2017		2016
Interest rate contracts
Loans	$	1,225	$	(5,311	)	Interest and fee income - loans and leases	$	144	$	123
Investment Securities	—		—			Noninterest income - other income	—		—
Total	$	1,225	$	(5,311	)		$	144	$	123

Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)				Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Nine Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	828	$	5,231	Interest and fee income - loans and leases	$	1,131	$	(770	)
Investment Securities	—		—		Noninterest income - other income	—		1
	$	828	$	5,231		$	1,131	$	(769	)

Gains and losses on swaps related to loans and investment securities are recorded in interest income and interest expense, respectively. During the next twelve months, Huntington expects to reclassify to earnings approximately $(1) million after-tax of unrealized gains (losses) on cash flow hedging derivatives currently in OCI.

The following table presents the gains and (losses) recognized in noninterest income for the ineffective portion of interest rate contracts for derivatives designated as cash flow hedges for the three and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Three Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	359	$	(371	)	$	225	$	6

Derivatives used in mortgage banking activities

Mortgage loan origination hedging activity

Huntington’s mortgage origination hedging activity is related to the hedging of the mortgage pricing commitments to customers and the secondary sale to third parties. The value of a newly originated mortgage is not firm until the interest rate is committed or locked. The interest rate lock commitments are derivative positions offset by forward commitments to sell loans.

Huntington uses two types of mortgage-backed securities in its forward commitments to sell loans. The first type of forward commitment is a “To Be Announced” (or TBA), the second is a “Specified Pool” mortgage-backed security. Huntington uses these derivatives to hedge the value of mortgage-backed securities until they are sold.

The following table summarizes the derivative assets and liabilities used in mortgage banking activities:

Derivatives used in mortgage banking activities	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Interest rate lock agreements	$	8,425	$	282	$	5,747	$	1,598
Forward trades and options	1,562		1,782		13,319		1,173
Total derivatives used in mortgage banking activities	$	9,987	$	2,064	$	19,066	$	2,771

MSR hedging activity

Huntington’s MSR economic hedging activity uses securities and derivatives to manage the value of the MSR asset and to mitigate the various types of risk inherent in the MSR asset, including risks related to duration, basis, convexity, volatility, and yield curve. The hedging instruments include forward commitments, interest rate swaps, and options on interest rate swaps.

The total notional value of these derivative financial instruments at September 30, 2017 and December 31, 2016, was $188 million and $300 million, respectively. The total notional amount at September 30, 2017 corresponds to trading assets with a fair value of $1 million and trading liabilities with a fair value of $2 million. Net trading gains and (losses) related to MSR hedging for the three-month periods ended September 30, 2017 and 2016, were less than $1 million and $(1) million and $1 million and $17 million for the nine-month periods ended September 30, 2017 and 2016, respectively. These amounts are included in mortgage banking income in the Unaudited Condensed Consolidated Statements of Income.

Derivatives used in customer related activities

Various derivative financial instruments are offered to enable customers to meet their financing and investing objectives and for their risk management purposes. Derivative financial instruments used in trading activities consist of commodity, interest rate, and foreign exchange contracts. Huntington may enter into offsetting third-party contracts with approved, reputable counterparties with substantially matching terms and currencies in order to economically hedge significant exposure related to derivatives used in trading activities.

The interest rate risk of customer derivatives is mitigated by entering into similar derivatives having offsetting terms with other counterparties. The credit risk to these customers is evaluated and included in the calculation of fair value. Foreign currency derivatives help the customer hedge risk and reduce exposure to fluctuations in exchange rates. Transactions are primarily in liquid currencies with Canadian dollars and Euros comprising a majority of all transactions. Commodity derivatives help the customer hedge risk and reduce exposure to fluctuations in the price of various commodities. Hedging of energy-related products and base metals comprise the majority of all transactions.

The net fair values of these derivative financial instruments, for which the gross amounts are included in accrued income and other assets or accrued expenses and other liabilities at both September 30, 2017 and December 31, 2016, were $84 million and $80 million, respectively. The total notional values of derivative financial instruments used by Huntington on behalf of customers, including offsetting derivatives, were $21.4 billion and $20.6 billion at both September 30, 2017 and December 31, 2016, respectively. Huntington’s credit risk from interest rate swaps used for trading purposes was $156 million and $196 million at the same dates, respectively.

Share Swap Economic Hedge

Huntington acquires and holds shares of Huntington common stock in a Rabbi Trust for the Executive Deferred Compensation Plan. Huntington common stock held in the Rabbi Trust is recorded at cost and the corresponding deferred compensation liability is recorded at fair value using Huntington's share price as a significant input.

During the second quarter of 2017, Huntington entered into an economic hedge with a notional value of $8 million to hedge deferred compensation expense related to the Executive Deferred Compensation Plan. During the third quarter 2017, the previous economic hedge entered into during the second quarter of 2016 of $20 million expired. Also during the third quarter of 2017, Huntington entered into an economic hedge with notional value of $31 million for a total of $39 million at September 30, 2017 to hedge deferred compensation expense related to the Executive Deferred Compensation Plan. The economic hedges are recorded at fair value in other assets or liabilities. Changes in the fair value are recorded directly through other noninterest expense in the Unaudited Condensed Consolidated Statements of Income. At September 30, 2017, the fair value of the share swaps was $1 million.

Visa^®-related Swap

In connection with the sale of Huntington’s Class B Visa^® shares, Huntington entered into a swap agreement with the purchaser of the shares. The swap agreement adjusts for dilution in the conversion ratio of Class B shares resulting from the Visa^® litigation. In connection with the FirstMerit acquisition, Huntington acquired an additional Visa^® related swap agreement. At September 30, 2017, the combined fair value of the swap liabilities of $5 million is an estimate of the exposure liability based upon Huntington’s assessment of the potential Visa^® litigation losses and timing of the litigation settlement.

Financial assets and liabilities that are offset in the Unaudited Condensed Consolidated Balance Sheets

Huntington records derivatives at fair value as further described in Note 11.

Derivative balances are presented on a net basis taking into consideration the effects of legally enforceable master netting agreements. Additionally, collateral exchanged with counterparties is also netted against the applicable derivative fair values. Huntington enters into derivative transactions with two primary groups: broker-dealers and banks, and Huntington’s customers. Different methods are utilized for managing counterparty credit exposure and credit risk for each of these groups.

Huntington enters into transactions with broker-dealers and banks for various risk management purposes. These types of transactions generally are high-dollar volume. Huntington enters into bilateral collateral and master netting agreements with these counterparties, and routinely exchanges cash and high quality securities collateral. Huntington enters into transactions with customers to meet their financing, investing, payment and risk management needs. These types of transactions generally are low-dollar volume. Huntington enters into master netting agreements with customer counterparties; however, collateral is generally not exchanged.

At September 30, 2017 and December 31, 2016, aggregate credit risk associated with these derivatives, net of collateral that has been pledged by the counterparty, was $30 million and $26 million, respectively. The credit risk associated with interest rate swaps is calculated after considering master netting agreements with broker-dealers and banks.

At September 30, 2017, Huntington pledged $144 million of investment securities and cash collateral to counterparties, while other counterparties pledged $78 million of investment securities and cash collateral to Huntington to satisfy collateral netting agreements. In the event of credit downgrades, Huntington would not be required to provide additional collateral.

The following tables present the gross amounts of these assets and liabilities with any offsets to arrive at the net amounts recognized in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

Offsetting of Financial Liabilities and Derivative Assets
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of assets presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized assets							Financial instruments			Cash collateral received			Net amount
September 30, 2017	Derivatives	$	320,826	$	(154,562	)	$	166,264	$	(23,350	)	$	(16,895	)	$	126,019
December 31, 2016	Derivatives	420,159		(181,940		)	238,219		(34,328		)	(5,428		)	198,463

Offsetting of Financial Liabilities and Derivative Liabilities
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of liabilities presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized liabilities							Financial instruments			Cash collateral delivered			Net amount
September 30, 2017	Derivatives	$	293,650	$	(234,526	)	$	59,124	$	—		$	(26,766	)	$	32,358
December 31, 2016	Derivatives	370,647		(272,361		)	98,286		(7,550		)	(23,943		)	66,793

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VIEs

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

VIEs

VIEs

Consolidated VIEs

Consolidated VIEs at September 30, 2017, consisted of certain loan and lease securitization trusts. Huntington has determined that the trusts are VIEs. Huntington has concluded that it is the primary beneficiary of these trusts because it has the power to direct the activities of the entity that most significantly affect the entity’s economic performance and it has either the obligation to absorb losses of the entity that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE.

The following tables present the carrying amount and classification of the consolidated trusts’ assets and liabilities that were included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,569	$	—	$	1,569
Net loans and leases	33,148		—		33,148
Accrued income and other assets	—		269		269
Total assets	$	34,717	$	269	$	34,986
Liabilities:
Other long-term debt	$	28,120	$	—	$	28,120
Accrued interest and other liabilities	—		269		269
Total liabilities	28,120		269		28,389
Equity:
Beneficial Interest owned by third party	6,597		—		6,597
Total liabilities and equity	$	34,717	$	269	$	34,986

	December 31, 2016
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,564	$	—	$	1,564
Net loans and leases	69,825		—		69,825
Accrued income and other assets	—		281		281
Total assets	$	71,389	$	281	$	71,670
Liabilities:
Other long-term debt	$	57,494	$	—	$	57,494
Accrued interest and other liabilities	—		281		281
Total liabilities	57,494		281		57,775
Equity:
Beneficial Interest owned by third party	13,895		—		13,895
Total liabilities and equity	$	71,389	$	281	$	71,670

The loans and leases were designated to repay the securitized notes. Huntington services the loans and leases and uses the proceeds from principal and interest payments to pay the securitized notes during the amortization period. Huntington has not provided financial or other support that was not previously contractually required.

Unconsolidated VIEs

The following tables provide a summary of the assets and liabilities included in Huntington’s Unaudited Condensed Consolidated Financial Statements, as well as the maximum exposure to losses, associated with its interests related to unconsolidated VIEs for which Huntington holds an interest, but is not the primary beneficiary to the VIE at September 30, 2017, and December 31, 2016.

	September 30, 2017
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	8,674	$	—	$	8,674
2015-1 Automobile Trust	1,506		—		1,506
Trust Preferred Securities	13,919		252,577		—
Low Income Housing Tax Credit Partnerships	638,171		348,733		638,171
Other Investments	108,556		48,339		108,556
Total	$	770,826	$	649,649	$	756,907

	December 31, 2016
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	14,770	$	—	$	14,770
2015-1 Automobile Trust	2,227		—		2,227
Trust Preferred Securities	13,919		252,552		—
Low Income Housing Tax Credit Partnerships	576,880		292,721		576,880
Other Investments	79,195		42,316		79,195
Total	$	686,991	$	587,589	$	673,072

The following table provides a summary of automobile transfers to trusts in separate securitization transactions.

(dollar amounts in millions)	Year	Amount Transferred
2016-1 Automobile Trust	2016	$	1,500
2015-1 Automobile Trust	2015	750

The securitizations and the resulting sale of all underlying securities qualified for sale accounting. Huntington has concluded that it is not the primary beneficiary of these trusts because it has neither the obligation to absorb losses of the entities that could potentially be significant to the VIEs nor the right to receive benefits from the entities that could potentially be significant to the VIEs. Huntington is not required and does not currently intend to provide any additional financial support to the trusts. Investors and creditors only have recourse to the assets held by the trusts. The interest Huntington holds in the VIEs relates to servicing rights which are included in servicing rights of Huntington’s Unaudited Consolidated Balance Sheets. The maximum exposure to loss is equal to the carrying value of the servicing asset. See Note 6 for more information.

Trust Preferred Securities

Huntington has certain wholly-owned trusts whose assets, liabilities, equity, income, and expenses are not included in Huntington’s Unaudited Condensed Consolidated Financial Statements. These trusts have been formed for the sole purpose of issuing trust-preferred securities, from which the proceeds are then invested in Huntington junior subordinated debentures, which are reflected in Huntington’s Unaudited Condensed Consolidated Balance Sheets as subordinated notes. The trust securities are the obligations of the trusts, and as such, are not consolidated in Huntington’s Unaudited Condensed Consolidated Financial Statements. A list of trust preferred securities outstanding at September 30, 2017 follows.

(dollar amounts in thousands)	Rate			Principal amount of subordinated note/ debenture issued to trust (1)		Investment in unconsolidated subsidiary
Huntington Capital I	2.01	%	(2)	$	69,730	$	6,186
Huntington Capital II	1.95		(3)	32,093		3,093
Sky Financial Capital Trust III	2.74		(4)	72,165		2,165
Sky Financial Capital Trust IV	2.70		(4)	74,320		2,320
Camco Financial Trust	3.76		(5)	4,269		155
Total				$	252,577	$	13,919

(1) Represents the principal amount of debentures issued to each trust, including unamortized original issue discount.

(2) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.70%.

(3) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.625%.

(4) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.40%.

(5) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.33%.

Each issue of the junior subordinated debentures has an interest rate equal to the corresponding trust securities distribution rate. Huntington has the right to defer payment of interest on the debentures at any time, or from time-to-time for a period not exceeding five years provided that no extension period may extend beyond the stated maturity of the related debentures. During any such extension period, distributions to the trust securities will also be deferred and Huntington’s ability to pay dividends on its common stock will be restricted. Periodic cash payments and payments upon liquidation or redemption with respect to trust securities are guaranteed by Huntington to the extent of funds held by the trusts. The guarantee ranks subordinate and junior in right of payment to all indebtedness of the Company to the same extent as the junior subordinated debt. The guarantee does not place a limitation on the amount of additional indebtedness that may be incurred by Huntington.

Low Income Housing Tax Credit Partnerships

Huntington makes certain equity investments in various limited partnerships that sponsor affordable housing projects utilizing the Low Income Housing Tax Credit (LIHTC) pursuant to Section 42 of the Internal Revenue Code. The purpose of these investments is to achieve a satisfactory return on capital, to facilitate the sale of additional affordable housing product offerings, and to assist in achieving goals associated with the Community Reinvestment Act. The primary activities of the limited partnerships include the identification, development, and operation of multi-family housing that is leased to qualifying residential tenants. Generally, these types of investments are funded through a combination of debt and equity.

Huntington uses the proportional amortization method to account for all qualified investments in these entities. These investments are included in accrued income and other assets. Investments that do not meet the requirements of the proportional amortization method are recognized using the equity method. Investment gains/losses related to these investments are included in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

The following table presents the balances of Huntington’s affordable housing tax credit investments and related unfunded commitments at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Affordable housing tax credit investments	$	980,984		$	877,237
Less: amortization	(342,813		)	(300,357		)
Net affordable housing tax credit investments	$	638,171		$	576,880
Unfunded commitments	$	348,733		$	292,721

The following table presents other information related to Huntington’s affordable housing tax credit investments for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Tax credits and other tax benefits recognized	$	22,471	$	21,200	$	68,426	$	57,634
Proportional amortization method
Tax credit amortization expense included in provision for income taxes	17,292		13,608		51,474		38,513
Equity method
Tax credit investment (gains) losses included in noninterest income	—		132		—		396

Huntington recognized immaterial impairment losses on tax credit investments during the three-month and nine-month periods ended September 30, 2017 and 2016. The impairment losses recognized related to the fair value of the tax credit investments that were less than carrying value.

Other Investments

Other investments determined to be VIEs include investments in New Market Tax Credit Investments, Historic Tax Credit Investments, Small Business Investment Companies, Rural Business Investment Companies, certain equity method investments and other miscellaneous investments.

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COMMITMENTS AND CONTINGENT LIABILITIES

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENT LIABILITIES

COMMITMENTS AND CONTINGENT LIABILITIES

Commitments to extend credit

In the ordinary course of business, Huntington makes various commitments to extend credit that are not reflected in the Unaudited Condensed Consolidated Financial Statements. The contract amounts of these financial agreements at September 30, 2017 and December 31, 2016, were as listed in the following table.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Contract amount representing credit risk:
Commitments to extend credit
Commercial	$	16,056,609	$	15,190,056
Consumer	12,977,175		12,235,943
Commercial real estate	1,373,127		1,697,671
Standby letters-of-credit	547,689		637,182
Commercial letters-of-credit	16,815		4,610

Commitments to extend credit generally have fixed expiration dates, are variable-rate, and contain clauses that permit Huntington to terminate or otherwise renegotiate the contracts in the event of a significant deterioration in the customer’s credit quality. These arrangements normally require the payment of a fee by the customer, the pricing of which is based on prevailing market conditions, credit quality, probability of funding, and other relevant factors. Since many of these commitments are expected to expire without being drawn upon, the contract amounts are not necessarily indicative of future cash requirements. The interest rate risk arising from these financial instruments is insignificant as a result of their predominantly short-term, variable-rate nature.

Standby letters-of-credit are conditional commitments issued to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Most of these arrangements mature within two years. The carrying amount of deferred revenue associated with these guarantees was $5 million and $8 million at September 30, 2017 and December 31, 2016, respectively.

Commercial letters-of-credit represent short-term, self-liquidating instruments that facilitate customer trade transactions and generally have maturities of no longer than 90 days. The goods or cargo being traded normally secures these instruments.

Commitments to sell loans

Activity related to our mortgage origination activity supports the hedging of the mortgage pricing commitments to customers and the secondary sale to third parties. At September 30, 2017 and December 31, 2016, Huntington had commitments to sell residential real estate loans of $1.0 billion and $0.8 billion, respectively. These contracts mature in less than one year.

Litigation

The nature of Huntington’s business ordinarily results in a certain amount of pending as well as threatened claims, litigation, investigations, regulatory and legal and administrative cases, matters and proceedings, all of which are considered incidental to the normal conduct of business. When the Company determines it has meritorious defenses to the claims asserted, it vigorously defends itself. The Company considers settlement of cases when, in Management’s judgment, it is in the best interests of both the Company and its shareholders to do so.

On at least a quarterly basis, Huntington assesses its liabilities and contingencies in connection with threatened and outstanding legal cases, matters and proceedings, utilizing the latest information available. For cases, matters and proceedings where it is both probable the Company will incur a loss and the amount can be reasonably estimated, Huntington establishes an accrual for the loss. Once established, the accrual is adjusted as appropriate to reflect any relevant developments. For cases, matters or proceedings where a loss is not probable or the amount of the loss cannot be estimated, no accrual is established.

In certain cases, matters and proceedings, exposure to loss exists in excess of the accrual to the extent such loss is reasonably possible, but not probable. Management believes an estimate of the aggregate range of reasonably possible losses, in excess of amounts accrued, for current legal proceedings is up to $65 million at September 30, 2017. For certain other cases, and matters, Management cannot reasonably estimate the possible loss at this time. Any estimate involves significant judgment, given the varying stages of the proceedings (including the fact that many of them are currently in preliminary stages), the existence of multiple defendants in several of the current proceedings whose share of liability has yet to be determined, the numerous unresolved issues in many of the proceedings, and the inherent uncertainty of the various potential outcomes of such proceedings. Accordingly, Management’s estimate will change from time-to-time, and actual losses may be more or less than the current estimate.

While the final outcome of legal cases, matters, and proceedings is inherently uncertain, based on information currently available, advice of counsel, and available insurance coverage, Management believes that the amount it has already accrued is adequate and any incremental liability arising from the Company’s legal cases, matters, or proceedings will not have a material negative adverse effect on the Company’s consolidated financial position as a whole. However, in the event of unexpected future developments, it is possible that the ultimate resolution of these cases, matters, and proceedings, if unfavorable, may be material to the Company’s consolidated financial position in a particular period.

Meoli v. The Huntington National Bank (Cyberco Litigation). The Bank has been named a defendant in a lawsuit arising from the Bank’s commercial lending, depository, and equipment leasing relationships with Cyberco Holdings, Inc. (Cyberco), Cyberco allegedly defrauded equipment lessors and financial institutions, including Huntington, in financing the purchase of computer equipment from Teleservices Group, Inc. (Teleservices), which itself later proved to be a shell corporation. Bankruptcy proceedings for both Cyberco and Teleservices ensued.

In an adversary proceeding brought by the bankruptcy trustee for Teleservices in the U.S. District Court for the Western District of Michigan, judgment was rendered against Huntington in the amount of $72 million plus costs and pre- and post-judgment interest. Huntington appealed the judgment to the U.S. Sixth Circuit Court of Appeals, which reversed the judgment in part and remanded the case for further proceedings. The case is currently before the bankruptcy court again. The parties have completed briefing on liability and the appropriate calculation of damages, and await the scheduling of a hearing on the issue.

Powell v. Huntington National Bank.  Huntington is a defendant in a class action filed on October 15, 2013 alleging Huntington charged late fees on mortgage loans in a method that violated West Virginia law and the loan documents. Plaintiffs seek statutory civil penalties, compensatory damages and attorney’s fees. Huntington filed a motion for summary judgment on the plaintiffs’ claims, which was granted by the U.S. District Court on December 28, 2016.  Plaintiffs have appealed to the U.S. Fourth Circuit Court of Appeals. Oral arguments were held on October 24, 2017.

FirstMerit Overdraft Litigation. Commencing in December 2010, two separate lawsuits were filed in the Summit County Court of Common Pleas and the Lake County Court of Common Pleas against FirstMerit. The complaints were brought as class actions on behalf of Ohio residents who maintained a checking account at FirstMerit and who incurred one or more overdraft fees as a result of the alleged re-sequencing of debit transactions. The parties have reached a global settlement for approximately $9 million cash to a common fund plus an additional $7 million in debt forgiveness. Attorneys' fees will be paid from the fund, with any remaining funds going to charity. FirstMerit’s insurer has reimbursed Huntington 49% of the approximately $9 million, which totals approximately $4.4 million. The court preliminarily approved the settlement on December 5, 2016 and the cash portion of the settlement was funded on December 12, 2016. The settlement received final approval on June 2, 2017 and there has been no appeal, so the settlement is final. Huntington is in the process of issuing settlement checks, forgiving the agreed-upon debt, and taking other actions as agreed upon in the settlement agreement. Because the settlement is in the process of being concluded, we anticipate no further reporting on this matter.

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SEGMENT REPORTING

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

SEGMENT REPORTING

SEGMENT REPORTING

Our business segments are based on our internally-aligned segment leadership structure, which is how we monitor results and assess performance. We have four major business segments: Consumer and Business Banking, Commercial Banking, Commercial Real Estate and Vehicle Finance(CREVF), Regional Banking and The Huntington Private Client Group(RBHPCG). The Treasury / Other function includes our technology and operations, other unallocated assets, liabilities, revenue, and expense.

Business segment results are determined based upon our management reporting system, which assigns balance sheet and income statement items to each of the business segments. The process is designed around our organizational and management structure and, accordingly, the results derived are not necessarily comparable with similar information published by other financial institutions. Additionally, because of the interrelationships of the various segments, the information presented is not indicative of how the segments would perform if they operated as independent entities.

Revenue is recorded in the business segment responsible for the related product or service. Fee sharing is recorded to allocate portions of such revenue to other business segments involved in selling to, or providing service to customers. Results of operations for the business segments reflect these fee-sharing allocations.

The management accounting process that develops the business segment reporting utilizes various estimates and allocation methodologies to measure the performance of the business segments. Expenses are allocated to business segments using a two-phase approach. The first phase consists of measuring and assigning unit (activity-based) costs to activities related to product origination and servicing. These activity-based costs are then extended, based on volumes, with the resulting amount allocated to business segments that own the related products. The second phase consists of the allocation of overhead costs to all four business segments from Treasury / Other. We utilize a full-allocation methodology, where all Treasury / Other expenses, except reported Significant Items, and a small amount of other residual unallocated expenses, are allocated to the four business segments.

The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to GAAP. As a result, reported segment results are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures result in changes in reported segment
financial data. Accordingly, certain amounts have been reclassified to conform to the current period presentation.

We use an active and centralized Funds Transfer Pricing (FTP) methodology to attribute appropriate income to the business segments. The intent of the FTP methodology is to transfer interest rate risk from the business segments by providing matched duration funding of assets and liabilities. The result centralizes the financial impact, management, and reporting of interest rate risk in the Treasury / Other function where it can be centrally monitored and managed. The Treasury / Other function charges (credits) an internal cost of funds for assets held in (or pays for funding provided by) each business segment. The FTP rate is based on prevailing market interest rates for comparable duration assets (or liabilities).

We announced a change in our executive leadership team, which became effective during the second quarter of 2017. As a result, the previously-reported Home Lending segment is now included as an operating unit in the Consumer and Business Banking segment. Additionally, the Insurance operating unit previously included in Commercial Banking was realigned to RBHPCG during second quarter. Prior period results have been reclassified to conform to the current period presentation.

Consumer and Business Banking - The Consumer and Business Banking segment, including Home Lending, provides a wide array of financial products and services to consumer and small business customers including but not limited to checking accounts, savings accounts, money market accounts, certificates of deposit, mortgage loans, consumer loans, credit cards, and small business loans and investment products. Other financial services available to consumer and small business customers include insurance, interest rate risk protection, foreign exchange, and treasury management. Business Banking is defined as serving companies with revenues up to $20 million and consists of approximately 254,000 businesses. Home Lending supports origination and servicing of consumer loans and mortgages for customers who are generally located in our primary banking markets across all segments.

Commercial Banking - Through a relationship banking model, this segment provides a wide array of products and services to the middle market, large corporate, and government public sector customers located primarily within our geographic footprint. The segment is divided into six business units: Middle Market, Large Corporate, Specialty Banking, Asset Finance, Capital Markets and Treasury Management.

Commercial Real Estate and Vehicle Finance - This segment provides lending and other banking products and services to customers outside of our traditional retail and commercial banking segments. Our products and services include providing financing for the purchase of automobiles, light-duty trucks, recreational vehicles and marine craft at franchised dealerships, financing the acquisition of new and used vehicle inventory of franchised automotive dealerships, and financing for land, buildings, and other commercial real estate owned or constructed by real estate developers, automobile dealerships, or other customers with real estate project financing needs. Products and services are delivered through highly specialized relationship-focused bankers and product partners.

Regional Banking and The Huntington Private Client Group - The core business of The Huntington Private Client Group is The Huntington Private Bank, which consists of Private Banking, Wealth & Investment Management, and Retirement Plan Services. The Huntington Private Bank provides high net-worth customers with deposit, lending (including specialized lending options), and banking services. The Huntington Private Bank delivers wealth management and legacy planning through investment and portfolio management, fiduciary administration, and trust services. This group also provides retirement plan services to corporate businesses. The Huntington Private Client Group provides corporate trust services and institutional and mutual fund custody services and insurance services.

Listed in the table below is certain operating basis financial information reconciled to Huntington’s September 30, 2017, December 31, 2016, and September 30, 2016, reported results by business segment.

	Three Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	426,752	$	171,448	$	139,870	$	49,596	$	(29,233	)	$	758,433
Provision for (reduction in allowance) credit losses	24,089		9,580		9,705		216		—			43,590
Noninterest income	189,378		59,121		10,969		46,215		24,414			330,097
Noninterest expense	415,874		100,003		55,354		58,237		50,960			680,428
Income taxes	61,658		42,345		30,022		13,076		(57,157		)	89,944
Net income	$	114,509	$	78,641	$	55,758	$	24,282	$	1,378		$	274,568
2016
Net interest income	$	349,283	$	143,023	$	126,489	$	41,971	$	(35,376	)	$	625,390
Provision for (reduction in allowance) credit losses	12,724		23,788		25,615		1,663		15			63,805
Noninterest income	177,234		54,744		8,001		45,339		17,097			302,415
Noninterest expense	349,470		87,892		44,331		57,473		173,081			712,247
Income taxes	57,513		30,130		22,590		9,861		(95,345		)	24,749
Net income	$	106,810	$	55,957	$	41,954	$	18,313	$	(96,030	)	$	127,004

	Nine Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	1,255,617	$	514,900	$	419,556	$	145,089	$	(102,242	)	$	2,232,920
Provision for credit losses	74,270		21,378		40,047		510		1			136,206
Noninterest income	544,445		176,609		34,750		140,610		71,364			967,778
Noninterest expense	1,242,152		301,385		163,989		182,171		192,517			2,082,214
Income taxes	169,274		129,061		87,594		36,056		(194,110		)	227,875
Net income	$	314,366	$	239,685	$	162,676	$	66,962	$	(29,286	)	$	754,403
2016
Net interest income	$	911,706	$	355,263	$	317,704	$	112,473	$	(62,809	)	$	1,634,337
Provision for credit losses	43,474		53,212		18,706		490		14			115,896
Noninterest income	459,732		150,228		25,951		126,245		53,238			815,394
Noninterest expense	967,417		246,941		125,254		166,645		220,731			1,726,988
Income taxes	126,191		71,868		69,893		25,054		(159,017		)	133,989
Net income	$	234,356	$	133,470	$	129,802	$	46,529	$	(71,299	)	$	472,858

	Assets at				Deposits at
(dollar amounts in thousands)	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Consumer & Business Banking	$	25,989,043	$	25,332,635	$	45,694,477	$	45,355,745
Commercial Banking	24,199,091		24,121,689		20,795,143		18,053,208
CREVF	24,723,324		23,576,832		2,052,274		1,893,072
RBHPCG	5,695,880		5,327,622		5,944,240		6,214,250
Treasury / Other	21,380,788		21,355,319		3,958,979		4,091,442
Total	$	101,988,126	$	99,714,097	$	78,445,113	$	75,607,717

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ACCOUNTING STANDARDS UPDATE (Policies)

9 Months Ended

Sep. 30, 2017

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

ACCOUNTING STANDARDS UPDATE

ACCOUNTING STANDARDS UPDATE

Standard	Summary of guidance	Effects on financial statements
ASU 2014-09 - Revenue from Contracts with Customers (Topic 606): Issued May 2014	- Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and most industry-specific guidance. - Requires an entity to recognize revenue upon 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. - Also requires additional qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers - Guidance sets forth a five step approach for revenue recognition.	- Effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Management intends to adopt the new guidance on January 1, 2018 using the modified retrospective approach. - Management's analysis includes: (a) Identification of all revenue streams included in the financial statements; (b) Determination of scope exclusions to identify ‘in-scope’ revenue streams; (c) Determination of size, timing, and amount of revenue recognition for in-scope items; (d) Identification of contracts for further analysis; and (e) Completion of review of certain contracts to evaluate the potential impact of the new guidance. - Key revenue streams identified include service charges, credit card and payment processing fees, trust services fees, insurance income, brokerage services, and mortgage banking income. - The new guidance is not expected to have a significant impact on Huntington’s Unaudited Consolidated Financial Statements.

Standard	Summary of guidance	Effects on financial statements
ASU 2016-01 - Recognition and Measurement of Financial Assets and Financial Liabilities. Issued January 2016	- Improvements to GAAP disclosures including requiring an entity to: (a) Measure its equity investments with changes in the fair value recognized in the income statement. (b) Present separately in OCI 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 in accordance with the fair value option for financial instruments (i.e., FVO liability). (c) Use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. (d) Assess deferred tax assets related to a net unrealized loss on AFS securities in combination with the entity’s other deferred tax assets.	- Effective for the fiscal period beginning after December 15, 2017, including interim periods within those fiscal years. - Amendments are applied as a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2016-02 - Leases. Issued February 2016	- New lease accounting model for lessors and lessees. For lessees, virtually all leases will be required to be recognized on the balance sheet by recording a right-of-use asset and lease liability. Subsequent accounting for leases varies depending on whether the lease is an operating lease or a finance lease. - Accounting applied by a lessor is largely unchanged from that applied under the existing guidance. - Requires additional qualitative and quantitative disclosures with the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases.	- Effective for the fiscal period beginning after December 15, 2018, with early application permitted. - Management intends to adopt the guidance on January 1, 2019, and has formed a working group comprised of associates from different disciplines, including Procurement, Real Estate, and Credit Administration, to evaluate the impact of the standard where Huntington is a lessee or lessor, as well as any impact to borrower’s financial statements. - Management is currently assessing the impact of the new guidance on Huntington's Unaudited Consolidated Financial Statements, including working with associates engaged in the procurement of goods and services used in the entity’s operations, and reviewing contractual arrangements for embedded leases in an effort to identify Huntington’s full lease population. - Huntington will recognize right-of-use assets and lease liabilities for virtually all of its operating lease commitments.
ASU 2016-13 - Financial Instruments - Credit Losses. Issued June 2016	- Eliminates the probable recognition threshold for credit losses on financial assets measured at amortized cost. - Requires those financial assets to be presented at the net amount expected to be collected (i.e., net of expected credit losses). - Measurement of expected credit losses should be based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectibility of the reported amount.	- Effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. - Applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. - Management intends to adopt the guidance on January 1, 2020 and has formed a working group comprised of teams from different disciplines including credit and finance to evaluate the requirements of the new standard and the impact it will have on our processes. - The early stages of this evaluation include a review of existing credit models to identify areas where existing credit models used to comply with other regulatory requirements may be leveraged and areas where new impairment models may be required.
ASU 2016-15 - Classification of Certain Cash Receipts and Cash Payments. Issued August 2016	- Clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. - Provides consistent principles for evaluating the classification of cash payments and receipts in the statement of cash flows to reduce diversity in practice with respect to several types of cash flows.	- Effective using a retrospective transition approach for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. - If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

Standard	Summary of guidance	Effects on financial statements
ASU 2017-04 - Simplifying the Test for Goodwill Impairment. Issued January 2017	- Simplifies the goodwill impairment test by eliminating Step 2 of the goodwill impairment process, which requires an entity to determine the implied fair value of its goodwill by assigning fair value to all its assets and liabilities. - Entities will instead recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. - Entities will still have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary.	- Effective for annual and interim goodwill tests performed in fiscal years beginning after December 15, 2019. Early adoption is permitted. - The amendment is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-07 - Improving the Presentation of Net Periodic Pension Cost and Periodic Postretirement Benefit Cost. Issued March 2017	- Requires that an employer report the service cost component of the pension cost and postretirement benefit cost in the same line items as other compensation costs arising from services rendered by the pertinent employees during the period. - Other components of the net benefit cost should be presented in the income statement separately from the service cost component.	- Effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. - This Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-09 - Stock Compensation Modification Accounting. Issued May 2017	- Reduces the current diversity in practice and provides explicit guidance pertaining to the provisions of modification accounting. - Clarifies that an entity should account for effects of modification unless the fair value, vesting conditions and the classification of the modified award are the same as the original awards immediately before the original award is modified.	- Effective prospectively for annual periods and interim periods within those annual periods, beginning after December 15, 2017. Earlier application is permitted. - The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.
ASU 2017-12 - Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities. Issued August 2017	- Aligns the entity’s risk management activities and financial reporting for hedging relationships. - Requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. - Refines measurement techniques for hedges of benchmark interest rate risk. - Eliminates the separate measurement and reporting of hedge ineffectiveness. - Allows stated amount of assets in a closed portfolio to be fair value hedged by excluding proportion of hedged item related to prepayments, defaults and other events. - Eases hedge effectiveness testing including an option to perform qualitative testing.	- Effective for annual periods and interim periods within those annual periods, beginning after December 15, 2018. For cash flow and net investment hedges, cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness should be recognized in AOCI with a corresponding adjustment to retained earnings. Earlier application is permitted. - Huntington is considering adopting the new guidance on January 1, 2018. The Update is not expected to have a significant impact on Huntington's Unaudited Consolidated Financial Statements.

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES (Tables)

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

Loan and Lease Portfolio

The following table provides a detailed listing of Huntington’s loan and lease portfolio at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Loans and leases:
Commercial and industrial	$	27,469,344		$	28,058,712
Commercial real estate	7,206,096			7,300,901
Automobile	11,876,033			10,968,782
Home equity	9,984,728			10,105,774
Residential mortgage	8,616,059			7,724,961
RV and marine finance	2,371,065			1,846,447
Other consumer	1,063,971			956,419
Loans and leases	68,587,296			66,961,996
Allowance for loan and lease losses	(675,486		)	(638,413		)
Net loans and leases	$	67,911,810		$	66,323,583

Loans acquired with deteriorated credit quality

The following table presents a rollforward of the accretable yield for purchased credit impaired loans for the three-month and nine-month period ended September 30, 2017.

	Three Months Ended September 30,			Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2017
Balance, beginning of period	$	36,509		$	36,669
Accretion	(4,343		)	(13,833		)
Reclassification (to) from nonaccretable difference	3,044			12,374
Balance, end of period	$	35,210		$	35,210

The following table reflects the ending and unpaid balances of the purchase credit impaired loans at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance		Ending Balance		Unpaid Principal Balance
Commercial and industrial	$	48,606	$	72,117	$	68,338	$	100,031
Commercial real estate	16,383		29,689		34,042		56,320
Total	$	64,989	$	101,806	$	102,380	$	156,351

Loan Purchases and Sales

There was no allowance for loan losses recorded on the purchased credit-impaired loan portfolio at September 30, 2017 and December 31, 2016.

NALs and Past Due Loans

The following table presents nonaccrual loans (NALs) by loan class at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Commercial and industrial	$	169,751	$	234,184
Commercial real estate	17,397		20,508
Automobile	4,076		5,766
Home equity	71,353		71,798
Residential mortgage	75,251		90,502
RV and marine finance	309		245
Other consumer	108		—
Total nonaccrual loans	$	338,245	$	423,003

Aging analysis of loans and leases

The following table presents an aging analysis of loans and leases, including past due loans, by loan class at September 30, 2017 and December 31, 2016. (1)

	September 30, 2017
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	$	36,505	$	10,654	$	77,835	$	124,994	$	27,295,744	$	48,606	$	—	$	27,469,344	$	14,083	(2)
Commercial real estate	35,444		2,586		20,010		58,040		7,131,673		16,383		—		7,206,096		9,550
Automobile	79,457		17,167		10,449		107,073		11,767,782		—		1,178		11,876,033		10,239
Home equity	41,748		19,601		63,747		125,096		9,857,359		—		2,273		9,984,728		16,150
Residential mortgage	111,722		45,041		104,167		260,930		8,260,742		—		94,387		8,616,059		62,832		(3)
RV and marine finance	10,303		2,184		2,134		14,621		2,355,309		—		1,135		2,371,065		2,063
Other consumer	10,180		4,394		3,752		18,326		1,045,427		—		218		1,063,971		3,752
Total loans and leases	$	325,359	$	101,627	$	282,094	$	709,080	$	67,714,036	$	64,989	$	99,191	$	68,587,296	$	118,669

	December 31, 2016
	Past Due												Loans Accounted for Under the Fair Value Option		Total Loans and Leases		90 or more days past due and accruing
(dollar amounts in thousands)	30-59 Days		60-89  Days		90 or  more days		Total		Current		Purchased Credit Impaired
Commercial and industrial	42,052		20,136		74,174		136,362		27,854,012		68,338		—		28,058,712		18,148		(2)
Commercial real estate	21,187		3,202		29,659		54,048		7,212,811		34,042		—		7,300,901		17,215
Automobile	76,283		17,188		10,442		103,913		10,862,715		—		2,154		10,968,782		10,182
Home equity	38,899		23,903		53,002		115,804		9,986,697		—		3,273		10,105,774		11,508
Residential mortgage	122,469		37,460		116,682		276,611		7,373,414		—		74,936		7,724,961		66,952		(3)
RV and marine finance	10,009		2,230		1,566		13,805		1,831,123		—		1,519		1,846,447		1,462
Other consumer	9,442		4,324		3,894		17,660		938,322		—		437		956,419		3,895
Total loans and leases	$	320,341	$	108,443	$	289,419	$	718,203	$	66,059,094	$	102,380	$	82,319	$	66,961,996	$	129,362

(1) NALs are included in this aging analysis based on their past due status.

(2) Amounts include Huntington Technology Finance administrative lease delinquencies.

ALLL and AULC activity by portfolio segment

The following table presents ALLL and AULC activity by portfolio segment for the three-month and nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2017:
ALLL balance, beginning of period	$	474,576		$	193,420		$	667,996
Loan charge-offs	(19,278		)	(45,494		)	(64,772		)
Recoveries of loans previously charged-off	10,015			11,865			21,880
Provision for (reduction in allowance) loan and lease losses	8,810			41,573			50,383
Allowance for loans sold or transferred to loans held for sale	(1		)	—			(1		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	82,827		$	2,532		$	85,359
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(6,528		)	(265		)	(6,793		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052
Nine-month period ended September 30, 2017:
ALLL balance, beginning of period	$	451,091		$	187,322		$	638,413
Loan charge-offs	(58,051		)	(133,884		)	(191,935		)
Recoveries of loans previously charged-off	33,619			39,946			73,565
Provision for (reduction in allowance) loan and lease losses	47,539			107,980			155,519
Allowance for loans sold or transferred to loans held for sale	(76		)	—			(76		)
ALLL balance, end of period	$	474,122		$	201,364		$	675,486
AULC balance, beginning of period	$	86,543		$	11,336		$	97,879
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	(10,244		)	(9,069		)	(19,313		)
AULC balance, end of period	$	76,299		$	2,267		$	78,566
ACL balance, end of period	$	550,421		$	203,631		$	754,052

(dollar amounts in thousands)	Commercial			Consumer			Total
Three-month period ended September 30, 2016:
ALLL balance, beginning of period	$	424,507		$	198,557		$	623,064
Loan charge-offs	(24,839		)	(34,429		)	(59,268		)
Recoveries of loans previously charged-off	8,312			10,891			19,203
Provision for (reduction in allowance) loan and lease losses	36,689			16,834			53,523
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,750		)	(19,624		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,717		$	10,031		$	73,748
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	9,739			543			10,282
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331
Nine-month period ended September 30, 2016:
ALLL balance, beginning of period	$	398,753		$	199,090		$	597,843
Loan charge-offs	(70,721		)	(91,784		)	(162,505		)
Recoveries of loans previously charged-off	62,127			35,006			97,133
Provision for (reduction in allowance) loan and lease losses	54,510			49,437			103,947
Allowance for loans sold or transferred to loans held for sale	(12,874		)	(6,646		)	(19,520		)
ALLL balance, end of period	$	431,795		$	185,103		$	616,898
AULC balance, beginning of period	$	63,448		$	8,633		$	72,081
Provision for (reduction in allowance) unfunded loan commitments and letters of credit	10,008			1,941			11,949
AULC recorded at acquisition	4,403			—			4,403
AULC balance, end of period	$	77,859		$	10,574		$	88,433
ACL balance, end of period	$	509,654		$	195,677		$	705,331

Loan and lease balances by credit quality indicator

The following table presents each loan and lease class by credit quality indicator at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	25,447,805	$	803,540	$	1,189,789	$	28,210	$	27,469,344
Commercial real estate	6,934,670		144,122		126,352		952		7,206,096
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,939,409	$	4,278,062	$	1,371,574	$	285,810	$	11,874,855
Home equity	6,359,778		2,985,933		621,817		14,927		9,982,455
Residential mortgage	5,311,993		2,479,820		599,055		130,804		8,521,672
RV and marine finance	1,385,176		853,545		91,302		39,907		2,369,930
Other consumer	404,047		510,804		136,346		12,556		1,063,753

	December 31, 2016
	Credit Risk Profile by UCS Classification
(dollar amounts in thousands)	Pass		OLEM		Substandard		Doubtful		Total
Commercial
Commercial and industrial	$	26,211,885	$	810,287	$	1,028,819	$	7,721	$	28,058,712
Commercial real estate	7,042,304		96,975		159,098		2,524		7,300,901
	Credit Risk Profile by FICO Score (1), (2)
	750+		650-749		<650		Other (3)		Total
Consumer
Automobile	$	5,369,085	$	4,043,611	$	1,298,460	$	255,472	$	10,966,628
Home equity	6,280,328		2,891,330		637,560		293,283		10,102,501
Residential mortgage	4,662,777		2,285,121		615,067		87,060		7,650,025
RV and marine finance	1,064,143		644,039		72,995		63,751		1,844,928
Other consumer	346,867		455,959		133,243		19,913		955,982

(1) Excludes loans accounted for under the fair value option.

(2) Reflects most recent customer credit scores.

(3) Reflects deferred fees and costs, loans in process, loans to legal entities, etc.

Summarized data for impaired loans and the related ALLL by portfolio segment

The following tables present the balance of the ALLL attributable to loans by portfolio segment individually and collectively evaluated for impairment and the related loan and lease balance at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at September 30, 2017:
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	22,838		13,874		36,712
Attributable to loans collectively evaluated for impairment	451,284		187,490		638,774
Total ALLL balance	$	474,122	$	201,364	$	675,486
Loan and Lease Ending Balances at September 30, 2017: (1)
Portion of loan and lease ending balance:
Purchased credit-impaired loans	$	64,989	$	—	$	64,989
Individually evaluated for impairment	566,340		621,808		1,188,148
Collectively evaluated for impairment	34,044,110		33,190,856		67,234,966
Total loans and leases evaluated for impairment	$	34,675,439	$	33,812,664	$	68,488,103

(dollar amounts in thousands)	Commercial		Consumer		Total
ALLL at December 31, 2016
Portion of ALLL balance:
Purchased credit-impaired loans	$	—	$	—	$	—
Attributable to loans individually evaluated for impairment	$	10,525	$	11,021	$	21,546
Attributable to loans collectively evaluated for impairment	440,566		176,301		616,867
Total ALLL balance:	$	451,091	$	187,322	$	638,413
Loan and Lease Ending Balances at December 31, 2016 (1)
Portion of loan and lease ending balances:
Purchased credit-impaired loans	$	102,380	$	—	$	102,380
Individually evaluated for impairment	415,624		457,890		873,514
Collectively evaluated for impairment	34,841,609		31,062,174		65,903,783
Total loans and leases evaluated for impairment	$	35,359,613	$	31,520,064	$	66,879,677

(1) Excludes loans accounted for under the fair value option.

Detailed impaired loan information by class

The following tables present by class the ending, unpaid principal balance, and the related ALLL, along with the average balance and interest income recognized only for impaired loans and leases and purchased credit-impaired loans: (1), (2)

	September 30, 2017						Three Months Ended September 30, 2017				Nine Months Ended September 30, 2017
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,349	$	324,474	$	—	$	294,513	$	4,969	$	227,611	$	7,467
Commercial real estate	65,382		92,215		—		71,277		1,825		80,388		5,762
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	213,520		245,328		19,958		222,745		1,950		334,297		12,712
Commercial real estate	53,078		60,366		2,880		40,672		468		54,352		1,388
Automobile	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance	1,520		1,520		88		1,425		23		884		58
Other consumer	6,456		6,456		1,288		6,944		47		7,117		184
Total
Commercial and industrial (3)	512,869		569,802		19,958		517,258		6,919		561,908		20,179
Commercial real estate (4)	118,460		152,581		2,880		111,949		2,293		134,740		7,150
Automobile (2)	33,049		33,049		1,683		32,740		496		32,293		1,576
Home equity (5)	335,763		367,870		14,486		330,784		3,713		326,932		11,639
Residential mortgage (5)	310,440		341,724		8,060		319,745		2,837		329,193		8,851
RV and marine finance (2)	1,520		1,520		88		1,425		23		884		58
Other consumer (2)	6,456		6,456		1,288		6,944		47		7,117		184

	December 31, 2016						Three Months Ended September 30, 2016				Nine Months Ended September 30, 2016
(dollar amounts in thousands)	Ending Balance		Unpaid Principal Balance (6)		Related Allowance		Average Balance		Interest Income Recognized		Average Balance		Interest Income Recognized
With no related allowance recorded:
Commercial and industrial	$	299,606	$	358,712	$	—	$	305,956	$	2,235	$	290,163	$	4,858
Commercial real estate	88,817		126,152		—		80,000		907		58,666		2,257
Automobile	—		—		—		—		—		—		—
Home equity	—		—		—		—		—		—		—
Residential mortgage	—		—		—		—		—		—		—
RV and marine finance	—		—		—		—		—		—		—
Other consumer	—		—		—		—		—		—		—
With an allowance recorded:
Commercial and industrial	406,243		448,121		22,259		281,934		1,631		274,262		5,460
Commercial real estate	97,238		107,512		3,434		49,140		521		49,587		1,895
Automobile	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance	—		—		—		—		—		—		—
Other consumer	3,897		3,897		260		4,454		58		4,627		178
Total
Commercial and industrial (3)	705,849		806,833		22,259		587,890		3,866		564,425		10,318
Commercial real estate (4)	186,055		233,664		3,434		129,140		1,428		108,253		4,152
Automobile (2)	30,961		31,298		1,850		31,540		541		31,912		1,643
Home equity (5)	319,404		352,722		15,032		284,512		3,453		267,264		9,382
Residential mortgage (5)	327,753		363,099		12,849		344,237		2,978		353,259		9,041
RV and marine finance (2)	—		—		—		—		—		—		—
Other consumer (2)	3,897		3,897		260		4,454		58		4,627		178

(1) These tables do not include loans fully charged-off.

(2) All automobile, RV and marine finance and other consumer impaired loans included in these tables are considered impaired due to their status as a TDR.

(3) At September 30, 2017 and December 31, 2016, commercial and industrial loans of $365 million and $317 million, respectively, were considered impaired due to their status as a TDR.

(4) At September 30, 2017 and December 31, 2016, commercial real estate loans of $84 million and $81 million, respectively, were considered impaired due to their status as a TDR.

(5) Includes home equity and residential mortgages considered to be collateral dependent due to their non-accrual status as well as home equity and mortgage loans considered impaired due to their status as a TDR.

(6) The differences between the ending balance and unpaid principal balance amounts represent partial charge-offs.

Detailed troubled debt restructuring information by class

The following table presents, by class and modification type, the number of contracts, post-modification outstanding balance, and the financial effects of the modification for the three-month and nine-month periods ended September 30, 2017 and 2016.

	New Troubled Debt Restructurings During The Three-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	6	$	817	$	—		2	$	122	$	6
Amortization or maturity date change	271	138,381		(837		)	246	89,100		(1,450		)
Other	—	—		—			6	711		(2		)
Total Commercial and industrial	277	139,198		(837		)	254	89,933		(1,446		)
Commercial real estate:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	28	17,811		133			30	11,183		(546		)
Other	—	—		—			—	—		—
Total commercial real estate:	28	17,811		133			30	11,183		(546		)
Automobile:
Interest rate reduction	5	72		3			4	26		3
Amortization or maturity date change	487	3,943		124			452	4,438		559
Chapter 7 bankruptcy	305	2,562		69			236	1,840		157
Other	—	—		—			—	—		—
Total Automobile	797	6,577		196			692	6,304		719
Home equity:
Interest rate reduction	8	376		11			14	352		10
Amortization or maturity date change	160	11,676		(1,131		)	110	6,740		(574		)
Chapter 7 bankruptcy	79	2,728		647			70	2,395		1,327
Other	—	—		—			—	—		—
Total Home equity	247	14,780		(473		)	194	9,487		763
Residential mortgage:
Interest rate reduction	—	—		—			2	134		(2		)
Amortization or maturity date change	102	11,282		(272		)	77	7,988		(220		)
Chapter 7 bankruptcy	20	1,656		(2		)	17	1,105		(63		)
Other	1	64		2			3	260		—
Total Residential mortgage	123	13,002		(272		)	99	9,487		(285		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	10	84		3			—	—		—
Chapter 7 bankruptcy	22	492		15			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	32	576		18			—	—		—
Other consumer:
Interest rate reduction	18	52		—			—	—		—
Amortization or maturity date change	677	3,106		1			1	16		—
Chapter 7 bankruptcy	4	24		1			1	6		—
Other	—	—		—			—	—		—
Total Other consumer	699	3,182		2			2	22		—
Total new troubled debt restructurings	2,203	$	195,126	$	(1,233	)	1,271	$	126,416	$	(795	)

	New Troubled Debt Restructurings During The Nine-Month Period Ended (1)
	September 30, 2017						September 30, 2016
(dollar amounts in thousands)	Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)			Number of Contracts	Post-modification Outstanding Ending Balance		Financial effects of modification (2)
Commercial and industrial:
Interest rate reduction	8	$	854	$	6		4	$	161	$	5
Amortization or maturity date change	735	418,924		(8,695		)	629	345,691		(4,368		)
Other	4	380		(27		)	16	1,801		(4		)
Total Commercial and industrial	747	420,158		(8,716		)	649	347,653		(4,367		)
Commercial real estate:
Interest rate reduction	—	—		—			1	84		—
Amortization or maturity date change	71	74,101		(682		)	90	60,995		(1,828		)
Other	—	—		—			4	315		16
Total commercial real estate:	71	74,101		(682		)	95	61,394		(1,812		)
Automobile:
Interest rate reduction	24	308		9			11	132		10
Amortization or maturity date change	1,298	11,097		302			1,159	11,002		981
Chapter 7 bankruptcy	743	5,878		116			797	6,384		386
Other	—	—		—			—	—		—
Total Automobile	2,065	17,283		427			1,967	17,518		1,377
Home equity:
Interest rate reduction	25	1,444		24			43	2,363		103
Amortization or maturity date change	401	25,544		(2,559		)	466	25,031		(2,592		)
Chapter 7 bankruptcy	243	8,764		2,049			215	8,106		2,327
Other	70	4,241		(326		)	—	—		—
Total Home equity	739	39,993		(812		)	724	35,500		(162		)
Residential mortgage:
Interest rate reduction	2	110		(9		)	12	1,195		(17		)
Amortization or maturity date change	282	30,649		(761		)	277	29,388		(1,217		)
Chapter 7 bankruptcy	69	6,328		(139		)	40	3,788		(42		)
Other	22	2,448		19			4	424		—
Total Residential mortgage	375	39,535		(890		)	333	34,795		(1,276		)
RV and marine finance:
Interest rate reduction	—	—		—			—	—		—
Amortization or maturity date change	34	710		19			—	—		—
Chapter 7 bankruptcy	71	1,246		25			—	—		—
Other	—	—		—			—	—		—
Total RV and marine finance	105	1,956		44			—	—		—
Other consumer:
Interest rate reduction	19	130		2			—	—		—
Amortization or maturity date change	681	3,394		8			6	575		24
Chapter 7 bankruptcy	7	36		1			8	72		7
Other	—	—		—			—	—		—
Total Other consumer	707	3,560		11			14	647		31
Total new troubled debt restructurings	4,809	$	596,586	$	(10,618	)	3,782	$	497,507	$	(6,209	)

(1) TDRs may include multiple concessions and the disclosure classifications are based on the primary concession provided to the borrower.

(2) Amount represents the financial impact via provision for loan and lease losses as a result of the modification.

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AVAILABLE-FOR-SALE AND OTHER SECURITIES (Tables)

9 Months Ended

Sep. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Contractual maturities of investment securities

Listed below are the contractual maturities of available-for-sale and other securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
U.S. Treasury and Federal agency securities:
U.S. Treasury:
1 year or less	$	11,256	$	11,260	$	4,978	$	4,988
After 1 year through 5 years	—		—		502		509
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		—		—
Total U.S. Treasury	11,256		11,260		5,480		5,497
Federal agencies: mortgage-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	32,749		32,515		46,591		46,762
After 5 years through 10 years	257,032		255,488		173,941		176,404
After 10 years	10,496,277		10,351,747		10,630,929		10,450,176
Total Federal agencies: mortgage-backed securities	10,786,058		10,639,750		10,851,461		10,673,342
Other agencies:
1 year or less	4,201		4,223		4,302		4,367
After 1 year through 5 years	8,892		9,034		5,092		5,247
After 5 years through 10 years	82,692		83,194		63,618		63,928
After 10 years	—		—		—		—
Total other agencies	95,785		96,451		73,012		73,542
Total U.S. Treasury and Federal agency securities	10,893,099		10,747,461		10,929,953		10,752,381
Municipal securities:
1 year or less	163,747		160,032		169,636		166,887
After 1 year through 5 years	905,872		905,075		933,893		933,903
After 5 years through 10 years	1,656,860		1,655,384		1,463,459		1,464,583
After 10 years	703,350		705,618		693,440		684,684
Total municipal securities	3,429,829		3,426,109		3,260,428		3,250,057
Asset-backed securities:
1 year or less	—		—		—		—
After 1 year through 5 years	80,003		80,330		80,700		80,560
After 5 years through 10 years	162,079		163,439		223,352		224,565
After 10 years	326,724		311,422		520,072		488,356
Total asset-backed securities	568,806		555,191		824,124		793,481
Corporate debt:
1 year or less	3,143		3,157		43,223		43,603
After 1 year through 5 years	66,878		68,450		78,430		80,196
After 5 years through 10 years	38,471		39,902		32,523		32,865
After 10 years	13,211		14,120		40,361		42,019
Total corporate debt	121,703		125,629		194,537		198,683
Other:
1 year or less	3,150		3,144		1,650		1,650
After 1 year through 5 years	800		791		2,302		2,283
After 5 years through 10 years	—		—		—		—
After 10 years	—		—		10		10
Nonmarketable equity securities	583,019		583,019		547,704		547,704
Mutual funds	10,416		10,416		15,286		15,286
Marketable equity securities	861		1,301		861		1,302
Total other	598,246		598,671		567,813		568,235
Total available-for-sale and other securities	$	15,611,683	$	15,453,061	$	15,776,855	$	15,562,837

Amortized cost, fair value, and gross unrealized gains and losses recognized in accumulated other comprehensive income

The following tables provide amortized cost, fair value, and gross unrealized gains and losses recognized in OCI by investment category at September 30, 2017 and December 31, 2016:

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
U.S. Treasury	$	11,256	$	4	$	—		$	11,260
Federal agencies:
Mortgage-backed securities	10,786,058		5,851		(152,159		)	10,639,750
Other agencies	95,785		722		(56		)	96,451
Total U.S. Treasury, Federal agency securities	10,893,099		6,577		(152,215		)	10,747,461
Municipal securities	3,429,829		31,043		(34,763		)	3,426,109
Asset-backed securities	568,806		2,409		(16,024		)	555,191
Corporate debt	121,703		3,927		(1		)	125,629
Other securities	598,246		439		(14		)	598,671
Total available-for-sale and other securities	$	15,611,683	$	44,395	$	(203,017	)	$	15,453,061

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
U.S. Treasury	$	5,480	$	17	$	—		$	5,497
Federal agencies:
Mortgage-backed securities	10,851,461		12,548		(190,667		)	10,673,342
Other agencies	73,012		536		(6		)	73,542
Total U.S. Treasury, Federal agency securities	10,929,953		13,101		(190,673		)	10,752,381
Municipal securities	3,260,428		28,431		(38,802		)	3,250,057
Asset-backed securities	824,124		1,492		(32,135		)	793,481
Corporate debt	194,537		4,161		(15		)	198,683
Other securities	567,813		441		(19		)	568,235
Total available-for-sale and other securities	$	15,776,855	$	47,626	$	(261,644	)	$	15,562,837

Available for sale securities in an unrealized loss position table text block

The following tables provide detail on investment securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position as of September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,283,266	$	(125,950	)	$	1,003,097	$	(26,209	)	$	9,286,363	$	(152,159	)
Other agencies	11,607		(56		)	—		—			11,607		(56		)
Total Federal agency securities	8,294,873		(126,006		)	1,003,097		(26,209		)	9,297,970		(152,215		)
Municipal securities	1,293,344		(23,995		)	277,157		(10,768		)	1,570,501		(34,763		)
Asset-backed securities	199,109		(1,471		)	122,568		(14,553		)	321,677		(16,024		)
Corporate debt	200		(1		)	—		—			200		(1		)
Other securities	791		(8		)	1,494		(6		)	2,285		(14		)
Total temporarily impaired securities	$	9,788,317	$	(151,481	)	$	1,404,316	$	(51,536	)	$	11,192,633	$	(203,017	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	8,908,470	$	(189,318	)	$	41,706	$	(1,349	)	$	8,950,176	$	(190,667	)
Other agencies	924		(6		)	—		—			924		(6		)
Total Federal agency securities	8,909,394		(189,324		)	41,706		(1,349		)	8,951,100		(190,673		)
Municipal securities	1,412,152		(29,175		)	272,292		(9,627		)	1,684,444		(38,802		)
Asset-backed securities	361,185		(3,043		)	178,924		(29,092		)	540,109		(32,135		)
Corporate debt	3,567		(15		)	200		—			3,767		(15		)
Other securities	790		(11		)	1,492		(8		)	2,282		(19		)
Total temporarily impaired securities	$	10,687,088	$	(221,568	)	$	494,614	$	(40,076	)	$	11,181,702	$	(261,644	)

Realized securities gains and losses

The following table is a summary of realized securities gains and losses for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Gross gains on sales of securities	$	4,201		$	3,770		$	8,311		$	7,161
Gross (losses) on sales of securities	(4,130		)	(2,739		)	(4,530		)	(5,398		)
Net gain on sales of securities	$	71		$	1,031		$	3,781		$	1,763
OTTI recognized in earnings	(104		)	—			(3,687		)	(76		)
Net securities gains (losses)	$	(33	)	$	1,031		$	94		$	1,687

Trust Preferred Securities Data

The following table summarizes the relevant characteristics of the Company's CDO securities portfolio, which are included in asset-backed securities, at September 30, 2017. Each security is part of a pool of issuers and supports a more senior tranche of securities except for the MM Comm III securities, which are the most senior class.

Collateralized Debt Obligation Securities

(dollar amounts in thousands)										Lowest Credit Rating (2)	# of Issuers Currently Performing/ Remaining (3)	Actual Deferrals and Defaults as a % of Original Collateral	Expected Defaults as a % of Remaining Performing Collateral	Excess Subordination (4)
Deal Name	Par Value		Amortized Cost		Fair Value		Unrealized Loss (1)
MM Comm III	4,509		4,308		3,641		(667		)	BB+	5/8	5	7	34
Reg Diversified	25,500		100		510		410			D		—	—	—
Tropic III	31,000		30,989		19,976		(11,013		)	BB	27/36	16	6	41
Total at September 30, 2017	$	61,009	$	35,397	$	24,127	$	(11,270	)
Total at December 31, 2016	$	137,197	$	101,210	$	76,003	$	(25,207	)

(1) The majority of securities have been in a continuous loss position for 12 months or longer.

(2) For purposes of comparability, the lowest credit rating expressed is equivalent to Fitch ratings even where the lowest rating is based on another nationally recognized credit rating agency.

(3) Includes both banks and/or insurance companies.

(4) Excess subordination percentage represents the additional defaults in excess of both current and projected defaults that the CDO can absorb before the bond experiences credit impairment. Excess subordinated percentage is calculated by (a) determining what percentage of defaults a deal can experience before the bond has credit impairment, and (b) subtracting from this default breakage percentage both total current and expected future default percentages.

Schedule of other than temporary impairment

For the three-month and nine-month periods ended September 30, 2017 and 2016, the following table summarizes by security type the total OTTI losses recognized in the Unaudited Condensed Consolidated Statements of Income for securities evaluated for impairment as described above.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Available-for-sale and other securities:
Collateralized Debt Obligations	$	—	$	—	$	3,559	$	—
Municipal Securities	104		—		128		76
Total available-for-sale and other securities	$	104	$	—	$	3,687	$	76

The following table presents the OTTI recognized in earnings on debt securities held by Huntington for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Balance, beginning of period	$	10,821		$	9,831		$	11,796		$	18,368
Reductions from sales	(5,373		)	(76		)	(9,931		)	(8,689		)
Additional credit losses	104			—			3,687			76
Balance, end of period	$	5,552		$	9,755		$	5,552		$	9,755

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HELD-TO-MATURITY SECURITIES (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of Held-to-maturity Securities [Line Items]

Contractual maturities of held-to-maturity securities

Listed below are the contractual maturities of held-to-maturity securities at September 30, 2017 and December 31, 2016.

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Federal agencies mortgage-backed securities:
1 year or less	$	—	$	—	$	—	$	—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	68,668		68,478		41,261		40,791
After 10 years	8,067,957		8,035,777		7,157,083		7,139,943
Total Federal agencies mortgage-backed securities	8,136,625		8,104,255		7,198,344		7,180,734
Other agencies:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	375,580		376,393		398,341		399,452
After 10 years	170,628		169,741		204,083		201,180
Total other agencies	546,208		546,134		602,424		600,632
Total Federal agencies	8,682,833		8,650,389		7,800,768		7,781,366
Municipal securities:
1 year or less	—		—		—		—
After 1 year through 5 years	—		—		—		—
After 5 years through 10 years	—		—		—		—
After 10 years	5,566		5,416		6,171		5,902
Total municipal securities	5,566		5,416		6,171		5,902
Total held-to-maturity securities	$	8,688,399	$	8,655,805	$	7,806,939	$	7,787,268

Amortized cost, gross unrealized gains and losses, and fair value by investment category

The following table provides amortized cost, gross unrealized gains and losses, and fair value by investment category at September 30, 2017 and December 31, 2016.

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	8,136,625	$	14,868	$	(47,238	)	$	8,104,255
Other agencies	546,208		1,697		(1,771		)	546,134
Total Federal agencies	8,682,833		16,565		(49,009		)	8,650,389
Municipal securities	5,566		—		(150		)	5,416
Total held-to-maturity securities	$	8,688,399	$	16,565	$	(49,159	)	$	8,655,805

			Unrealized
(dollar amounts in thousands)	Amortized Cost		Gross Gains		Gross Losses			Fair Value
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	7,198,344	$	20,883	$	(38,493	)	$	7,180,734
Other agencies	602,424		1,690		(3,482		)	600,632
Total Federal agencies	7,800,768		22,573		(41,975		)	7,781,366
Municipal securities	6,171		—		(269		)	5,902
Total held-to-maturity securities	$	7,806,939	$	22,573	$	(42,244	)	$	7,787,268

Investment securities in an unrealized loss position

The following tables provide detail on held-to-maturity securities with unrealized gross losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position, at September 30, 2017 and December 31, 2016.

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2017
Federal agencies:
Mortgage-backed securities	$	5,729,896	$	(38,204	)	$	301,637	$	(9,034	)	$	6,031,533	$	(47,238	)
Other agencies	248,109		(1,771		)	—		—			248,109		(1,771		)
Total Federal agencies	5,978,005		(39,975		)	301,637		(9,034		)	6,279,642		(49,009		)
Municipal securities	—		—			5,416		(150		)	5,416		(150		)
Total temporarily impaired securities	$	5,978,005	$	(39,975	)	$	307,053	$	(9,184	)	$	6,285,058	$	(49,159	)

	Less than 12 Months					Over 12 Months					Total
(dollar amounts in thousands)	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2016
Federal agencies:
Mortgage-backed securities	$	2,855,360	$	(31,470	)	$	186,226	$	(7,023	)	$	3,041,586	$	(38,493	)
Other agencies	413,207		(3,482		)	—		—			413,207		(3,482		)
Total Federal agencies	3,268,567		(34,952		)	186,226		(7,023		)	3,454,793		(41,975		)
Municipal securities	5,902		(269		)	—		—			5,902		(269		)
Total temporarily impaired securities	$	3,274,469	$	(35,221	)	$	186,226	$	(7,023	)	$	3,460,695	$	(42,244	)

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LOAN SALES AND SECURITIZATIONS (Tables)

9 Months Ended

Sep. 30, 2017

Transfers and Servicing [Abstract]

Summarizes activity relating to loans securitized sold with servicing retained

The following table summarizes activity relating to SBA loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
SBA loans sold with servicing retained	$	107,259	$	62,803	$	272,635	$	167,321
Pretax gains resulting from above loan sales (1)	8,508		4,679		21,435		12,862

(1) Recorded in gain on sale of loans.

The following table summarizes activity relating to residential mortgage loans sold with servicing retained for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Residential mortgage loans sold with servicing retained	$	1,178,955	$	1,204,547	$	2,824,707	$	2,552,602
Pretax gains resulting from above loan sales (1)	26,880		32,073		66,014		64,804

(1) Recorded in mortgage banking income.

Summarizes activity relating to loans sold with servicing retained using the fair value method

The following tables summarize the changes in MSRs recorded using either the fair value method or the amortization method for the three-month and nine-month periods ended September 30, 2017 and 2016.

Fair Value Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Fair value, beginning of period	$	12,528		$	13,105		$	13,747		$	17,585
Change in fair value during the period due to:
Time decay (1)	(202		)	(217		)	(649		)	(734		)
Payoffs (2)	(295		)	(423		)	(876		)	(1,392		)
Changes in valuation inputs or assumptions (3)	(278		)	(37		)	(469		)	(3,031		)
Fair value, end of period:	$	11,753		$	12,428		$	11,753		$	12,428
Weighted-average life (years)	5.5			5.1			5.5			5.1

(1) Represents decrease in value due to passage of time, including the impact from both regularly scheduled loan principal payments and partial loan paydowns.

(2) Represents decrease in value associated with loans that paid off during the period.

(3) Represents change in value resulting primarily from market-driven changes in interest rates and prepayment speeds.

Summarizes activity relating to loans sold with servicing retained using the amortization method

Changes in the carrying value of automobile loan servicing rights for the three-month and nine-month periods ended September 30, 2017 and 2016, and the fair value at the end of each period were as shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	12,524		$	5,458		$	18,285		$	8,771
Amortization and other	(2,338		)	(1,087		)	(8,099		)	(4,400		)
Carrying value, end of period	$	10,186		$	4,371		$	10,186		$	4,371
Fair value, end of period	$	10,398		$	4,366		$	10,398		$	4,366
Weighted-average contractual life (years)	3.7			3.2			3.7			3.2

The following tables summarize the changes in the carrying value of the servicing asset for the three-month and nine-month periods ended September 30, 2017 and 2016. The fair value at the end of each period is shown in the table below.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	23,113		$	19,612		$	21,080		$	19,747
New servicing assets created	3,591			1,879			9,187			5,259
Amortization and other	(1,923		)	(1,745		)	(5,486		)	(5,260		)
Carrying value, end of period	$	24,781		$	19,746		$	24,781		$	19,746
Fair value, end of period	$	28,822		$	24,065		$	28,822		$	24,065
Weighted-average life (years)	3.3			3.3			3.3			3.3

Amortization Method:	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Carrying value, beginning of period	$	176,491		$	121,292		$	172,466		$	143,133
New servicing assets created	12,841			12,434			30,694			25,820
Servicing assets acquired	—			15,317			—			15,317
Impairment (charge) / recovery	688			2,543			(318		)	(21,093		)
Amortization and other	(6,995		)	(7,194		)	(19,817		)	(18,785		)
Carrying value, end of period	$	183,025		$	144,392		$	183,025		$	144,392
Fair value, end of period	$	183,583		$	144,623		$	183,583		$	144,623
Weighted-average life (years)	7.0			6.1			7.0			6.1

Summary of key assumptions and the sensitivity of the servicing rights value to changes in the assumptions

A summary of key assumptions and the sensitivity of the SBA loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	7.50	%	$	(385	)	$	(764	)	7.40	%	$	(324	)	$	(644	)
Discount rate	15.00		(774		)	(1,516		)	15.00		(1,270		)	(1,870		)

A summary of key assumptions and the sensitivity of the automobile loan servicing rights value to changes in these assumptions at September 30, 2017 and December 31, 2016 is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	23.66	%	$	(586	)	$	(1,112	)	19.98	%	$	(1,047	)	$	(2,026	)
Spread over forward interest rate swap rates	500	bps	(14		)	(27		)	500	bps	(26		)	(53		)

For MSRs under the fair value method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	12.10	%	$	(472	)	$	(910	)	10.90	%	$	(501	)	$	(970	)
Spread over forward interest rate swap rates	813	bps	(436		)	(823		)	536	bps	(454		)	(879		)

For MSRs under the amortization method, a summary of key assumptions and the sensitivity of the MSR value at September 30, 2017 and December 31, 2016, to changes in these assumptions is shown in the table below.

	September 30, 2017								December 31, 2016
			Decline in fair value due to								Decline in fair value due to
(dollar amounts in thousands)	Actual		10% adverse change			20% adverse change			Actual		10% adverse change			20% adverse change
Constant prepayment rate (annualized)	8.40	%	$	(5,172	)	$	(10,038	)	7.80	%	$	(4,510	)	$	(8,763	)
Spread over forward interest rate swap rates	1,041	bps	(6,866		)	(12,934		)	1,173	bps	(5,259		)	(10,195		)

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OTHER COMPREHENSIVE INCOME (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Components of other comprehensive income

The components of other comprehensive income for the three-month and nine-month periods ended September 30, 2017 and 2016, were as shown in the following table.

	Three Months Ended September 30, 2017
				Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	410		$	(145	)	$	265
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(42,429		)	14,828			(27,601		)
Less: Reclassification adjustment for net losses (gains) included in net income	8,715			(3,082		)	5,633
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(33,304		)	11,601			(21,703		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,885			(660		)	1,225
Less: Reclassification adjustment for net (gains) losses included in net income	144			(51		)	93
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,029			(711		)	1,318
Net change in pension and other post-retirement obligations	1,198			(419		)	779
Total other comprehensive income (loss)	$	(30,077	)	$	10,471		$	(19,606	)

	Three Months Ended September 30, 2016
	Tax (Expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	2,002		$	(708	)	$	1,294
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	(54,109		)	18,604			(35,505		)
Less: Reclassification adjustment for net losses (gains) included in net income	726			(257		)	469
Net change in unrealized holding gains (losses) on available-for-sale debt securities	(51,381		)	17,639			(33,742		)
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	(8,171		)	2,860			(5,311		)
Less: Reclassification adjustment for net (gains) losses included in net income	123			(44		)	79
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	(8,048		)	2,816			(5,232		)
Net change in pension and other post-retirement obligations	1,293			(452		)	841
Total other comprehensive income (loss)	$	(58,136	)	$	20,003		$	(38,133	)

	Nine Months Ended September 30, 2017
			Tax (expense)
(dollar amounts in thousands)	Pretax		Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	3,698	$	(1,307	)	$	2,391
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	19,853		(6,779		)	13,074
Less: Reclassification adjustment for net losses (gains) included in net income	18,577		(6,570		)	12,007
Net change in unrealized holding gains (losses) on available-for-sale debt securities	42,128		(14,656		)	27,472
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	1,274		(446		)	828
Less: Reclassification adjustment for net (gains) losses included in net income	1,131		(396		)	735
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	2,405		(842		)	1,563
Net change in pension and other post-retirement obligations	3,104		(1,086		)	2,018
Total other comprehensive income (loss)	$	47,637	$	(16,584	)	$	31,053

	Nine Months Ended September 30, 2016
	Tax (expense)
(dollar amounts in thousands)	Pretax			Benefit			After-tax
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	$	(600	)	$	212		$	(388	)
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period	76,637			(28,315		)	48,322
Less: Reclassification adjustment for net losses (gains) included in net income	(2,032		)	718			(1,314		)
Net change in unrealized holding gains (losses) on available-for-sale debt securities	74,005			(27,385		)	46,620
Net change in unrealized holding gains (losses) on available-for-sale equity securities	170			(60		)	110
Unrealized gains (losses) on derivatives used in cash flow hedging relationships arising during the period	8,047			(2,816		)	5,231
Less: Reclassification adjustment for net (gains) losses included in net income	(769		)	269			(500		)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships	7,278			(2,547		)	4,731
Net change in pension and other post-retirement obligations	3,879			(1,357		)	2,522
Total other comprehensive income (loss)	$	85,332		$	(31,349	)	$	53,983

Activity in accumulated other comprehensive income, net of tax

The following table presents activity in accumulated other comprehensive income (loss), net of tax, for the nine-month periods ended September 30, 2017 and 2016.

(dollar amounts in thousands)	Unrealized gains and (losses) on debt securities (1)			Unrealized gains and (losses) on equity securities		Unrealized gains and (losses) on cash flow hedging derivatives			Unrealized gains (losses) for pension and other post- retirement obligations			Total
December 31, 2015	$	8,361		$	176	$	(3,948	)	$	(230,747	)	$	(226,158	)
Other comprehensive income before reclassifications	47,934			110		5,231			—			53,275
Amounts reclassified from accumulated OCI to earnings	(1,314		)	—		(500		)	2,522			708
Period change	46,620			110		4,731			2,522			53,983
September 30, 2016	$	54,981		$	286	$	783		$	(228,225	)	$	(172,175	)
December 31, 2016	$	(192,764	)	$	287	$	(2,634	)	$	(205,905	)	$	(401,016	)
Other comprehensive income before reclassifications	15,465			—		828			—			16,293
Amounts reclassified from accumulated OCI to earnings	12,007			—		735			2,018			14,760
Period change	27,472			—		1,563			2,018			31,053
September 30, 2017	$	(165,292	)	$	287	$	(1,071	)	$	(203,887	)	$	(369,963	)

Reclassification Out Of Accumulated OCI

The following table presents the reclassification adjustments out of accumulated OCI included in net income and the impacted line items as listed on the Unaudited Condensed Consolidated Statements of Income for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Three Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(1,498	)	$	(726	)	Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,113		)	—			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(104		)	—			Noninterest income - net gains (losses) on sale of securities
	(8,715		)	(726		)	Total before tax
	3,082			257			Tax (expense) benefit
	$	(5,633	)	$	(469	)	Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(144	)	$	(123	)	Interest income - loans and leases
Interest rate contracts	—			—			Noninterest income - other income
	(144		)	(123		)	Total before tax
	51			44			Tax (expense) benefit
	$	(93	)	$	(79	)	Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(1,690	)	$	(1,785	)	Noninterest expense - personnel costs
Prior service credit	492			492			Noninterest expense - personnel costs
	(1,198		)	(1,293		)	Total before tax
	419			452			Tax (expense) benefit
	$	(779	)	$	(841	)	Net of tax

	Reclassifications out of accumulated OCI
Accumulated OCI components	Amounts reclassified from accumulated OCI						Location of net gain (loss) reclassified from accumulated OCI into earnings
	Nine Months Ended
(dollar amounts in thousands)	September 30, 2017			September 30, 2016
Gains (losses) on debt securities:
Amortization of unrealized gains (losses)	$	(7,388	)	$	478		Interest income - held-to-maturity securities - taxable
Realized gain (loss) on sale of securities	(7,502		)	1,630			Noninterest income - net gains (losses) on sale of securities
OTTI recorded	(3,687		)	(76		)	Noninterest income - net gains (losses) on sale of securities
	(18,577		)	2,032			Total before tax
	6,570			(718		)	Tax (expense) benefit
	$	(12,007	)	$	1,314		Net of tax
Gains (losses) on cash flow hedging relationships:
Interest rate contracts	$	(1,131	)	$	770		Interest income - loans and leases
Interest rate contracts	—			(1		)	Noninterest income - other income
	(1,131		)	769			Total before tax
	396			(269		)	Tax (expense) benefit
	$	(735	)	$	500		Net of tax
Amortization of defined benefit pension and post-retirement items:
Actuarial gains (losses)	$	(4,580	)	$	(5,355	)	Noninterest expense - personnel costs
Prior service credit	1,476			1,476			Noninterest expense - personnel costs
	(3,104		)	(3,879		)	Total before tax
	1,086			1,357			Tax (expense) benefit
	$	(2,018	)	$	(2,522	)	Net of tax

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EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Basic and diluted earnings loss per share

The calculation of basic and diluted earnings per share for the three and nine-month periods ended September 30, 2017 and 2016, was as shown in the table.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands, except per share amounts)	2017			2016			2017			2016
Basic earnings per common share:
Net income	$	274,568		$	127,004		$	754,403		$	472,858
Preferred stock dividends	(18,903		)	(18,537		)	(56,670		)	(46,409		)
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Basic earnings per common share	$	0.24		$	0.12		$	0.64		$	0.51
Diluted earnings per common share:
Net income available to common shareholders	$	255,665		$	108,467		$	697,733		$	426,449
Effect of assumed preferred stock conversion	—			—			—			—
Net income applicable to diluted earnings per share	$	255,665		$	108,467		$	697,733		$	426,449
Average common shares issued and outstanding	1,086,038			938,578			1,087,115			844,167
Dilutive potential common shares:
Stock options and restricted stock units and awards	17,079			10,714			17,515			10,295
Shares held in deferred compensation plans	3,228			2,654			3,096			2,337
Other	146			135			152			135
Dilutive potential common shares	20,453			13,503			20,763			12,767
Total diluted average common shares issued and outstanding	1,106,491			952,081			1,107,878			856,934
Diluted earnings per common share	$	0.23		$	0.11		$	0.63		$	0.50

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BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The following table shows the components of net periodic (benefit) cost for all plans.

	Pension Benefits						Post-Retirement Benefits
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	640		$	1,425		$	22		$	16
Interest cost	7,478			7,978			98			79
Expected return on plan assets	(13,803		)	(12,086		)	—			—
Amortization of prior service cost	—			—			(492		)	(492		)
Amortization of (gain) loss	1,747			1,865			(55		)	(72		)
Settlements	5,049			3,400			—			—
Net periodic (benefit) cost	$	1,111		$	2,582		$	(427	)	$	(469	)

	Pension Benefits						Post-Retirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Service cost	$	1,920		$	3,475		$	65		$	16
Interest cost	22,433			21,474			296			188
Expected return on plan assets	(41,409		)	(32,533		)	—			—
Amortization of prior service cost	—			—			(1,476		)	(1,476		)
Amortization of (gain) loss	5,241			5,594			(164		)	(216		)
Settlements	10,049			10,200			—			—
Net periodic (benefit) cost	$	(1,766	)	$	8,210		$	(1,279	)	$	(1,488	)

Schedule of Costs of Retirement Plans

defined contribution plans during the third quarter2017 and 2016 was $5 million and $9 million, respectively. For the nine-month periods ended September 30, 2017 and 2016, expense related to the defined contribution plans was $26 million and $26 million, respectively.

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FAIR VALUES OF ASSETS AND LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

Assets and Liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis at September 30, 2017 and December 31, 2016 are summarized in the table below.

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	584,829	$	—	$	—		$	584,829
Loans held for investment	—		58,708		40,483		—			99,191
Trading account securities:
U.S. Treasury securities	25		—		—		—			25
Municipal securities	—		1,481		—		—			1,481
Other securities	86,982		—		—		—			86,982
	87,007		1,481		—		—			88,488
Available-for-sale and other securities:
U.S. Treasury securities	11,260		—		—		—			11,260
Federal agencies: Mortgage-backed	—		10,639,750		—		—			10,639,750
Federal agencies: Other agencies	—		96,451		—		—			96,451
Municipal securities	—		468,082		2,958,027		—			3,426,109
Asset-backed securities	—		531,064		24,127		—			555,191
Corporate debt	—		125,629		—		—			125,629
Other securities	11,717		3,935		—		—			15,652
	22,977		11,864,911		2,982,154		—			14,870,042
MSRs	—		—		11,753		—			11,753
Derivative assets	—		312,401		8,425		(154,562		)	166,264
Liabilities
Derivative liabilities	—		288,191		5,459		(234,526		)	59,124
Short-term borrowings	4		—		—		—			4

	Fair Value Measurements at Reporting Date Using						Netting Adjustments (1)			December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Assets
Loans held for sale	$	—	$	438,224	$	—	$	—		$	438,224
Loans held for investment	—		34,439		47,880		—			82,319
Trading account securities:
Municipal securities	—		1,148		—		—			1,148
Other securities	132,147		—		—		—			132,147
	132,147		1,148		—		—			133,295
Available-for-sale and other securities:
U.S. Treasury securities	5,497		—		—		—			5,497
Federal agencies: Mortgage-backed	—		10,673,342		—		—			10,673,342
Federal agencies: Other agencies	—		73,542		—		—			73,542
Municipal securities	—		452,013		2,798,044		—			3,250,057
Asset-backed securities	—		717,478		76,003		—			793,481
Corporate debt	—		198,683		—		—			198,683
Other securities	16,588		3,943		—		—			20,531
	22,085		12,119,001		2,874,047		—			15,015,133
MSRs	—		—		13,747		—			13,747
Derivative assets	—		414,412		5,747		(181,940		)	238,219
Liabilities
Derivative liabilities	—		362,777		7,870		(272,361		)	98,286
Short-term borrowings	474		—		—		—			474

(1) Amounts represent the impact of legally enforceable master netting agreements that allow the Company to settle positive and negative positions and cash collateral held or placed with the same counterparties.

Rollforward of financial instruments measured on a recurring basis and classified as Level 3

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	12,528		$	3,178		$	2,872,007		$	42,575		$	43,855
Transfers out of Level 3 (1)	—			(1,376		)	—			—			—
Total gains/losses for the period:
Included in earnings	(775		)	1,164			(637		)	(1,569		)	187
Included in OCI	—			—			(33,781		)	5,166			—
Purchases/originations	—			—			166,514			—			—
Sales	—			—			(90		)	(21,625		)	—
Repayments	—			—			—			—			(3,559		)
Settlements	—			—			(45,986		)	(420		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(775	)	$	1,164		$	(104	)	$	—		$	—

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,105		$	12,751		$	2,237,975		$	71,379		$	925
Transfers out of Level 3 (1)	—			(1,692		)	—			—			—
Total gains/losses for the period:
Included in earnings	(677		)	(2,459		)	4,166			—			(249		)
Included in OCI	—			—			(28,272		)	2,875			—
Purchases/originations	—			—			953,639			10			56,469
Sales	—			—						—			—
Repayments	—			—			—			—			(3,860		)
Settlements	—			—			(262,235		)	(445		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(677	)	$	(2,459	)	$	—		$	—		$	—

(1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that were transferred to loans held for sale, which are classified as Level 2.

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset-backed securities			Loans held for investment
Opening balance	$	13,747		$	(2,123	)	$	2,798,044		$	76,003		$	47,880
Transfers out of Level 3 (1)	—			(3,833		)	—			—			—
Total gains/losses for the period:
Included in earnings	(1,994		)	8,922			(3,612		)	(5,097		)	1,617
Included in OCI	—			—			(887		)	13,936			—
Purchases/originations	—			—			414,123			—			—
Sales	—			—			(90		)	(59,353		)	—
Repayments	—			—			—			—			(9,014		)
Settlements	—			—			(249,551		)	(1,362		)	—
Closing balance	$	11,753		$	2,966		$	2,958,027		$	24,127		$	40,483
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(1,994	)	$	8,922		$	(128	)	$	(3,559	)	$	—

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities			Asset- backed securities			Loans held for investment
Opening balance	$	17,585		$	6,056		$	2,095,551		$	100,337		$	1,748
Transfers out of Level 3 (1)	—			(5,115		)	—			—			—
Total gains/losses for the period:
Included in earnings	(5,157		)	7,659			4,166			2			(249		)
Included in OCI	—			—			(8,946		)	3,549			—
Purchases/originations	—			—			1,237,546			10			56,469
Sales	—			—			(36,657		)	(27,794		)	—
Repayments	—			—			—			—			(4,683		)
Settlements	—			—			(386,387		)	(2,285		)	—
Closing balance	$	12,428		$	8,600		$	2,905,273		$	73,819		$	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	$	(5,157	)	$	7,759		$	—		$	2		$	—

Classification of gains and losses due to changes in fair value, recorded in earnings for Level 3 assets and liabilities

The tables below summarize the classification of gains and losses due to changes in fair value, recorded in earnings for Level 3 assets and liabilities for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Level 3 Fair Value Measurements Three Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(775	)	$	1,164	$	—		$	—		$	—
Securities gains (losses)	—			—		(104		)	(1,569		)	—
Interest and fee income	—			—		(533		)	—			—
Noninterest income	—			—		—			—			187
Total	$	(775	)	$	1,164	$	(637	)	$	(1,569	)	$	187

	Level 3 Fair Value Measurements Three Months Ended September 30, 2016
							Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments			Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(677	)	$	(2,459	)	$	—	$	—	$	—
Securities gains (losses)	—			—			—		—		—
Interest and fee income	—			—			—		—		—
Noninterest income	—			—			4,166		—		(249		)
Total	$	(677	)	$	(2,459	)	$	4,166	$	—	$	(249	)

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2017
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities			Asset-backed securities			Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(1,994	)	$	8,922	$	—		$	—		$	—
Securities gains (losses)	—			—		(128		)	(5,100		)	—
Interest and fee income	—			—		(3,484		)	3			—
Noninterest income	—			—		—			—			1,617
Total	$	(1,994	)	$	8,922	$	(3,612	)	$	(5,097	)	$	1,617

	Level 3 Fair Value Measurements Nine Months Ended September 30, 2016
						Available-for-sale securities
(dollar amounts in thousands)	MSRs			Derivative instruments		Municipal securities		Asset-backed securities		Loans held for investment
Classification of gains and losses in earnings:
Mortgage banking income	$	(5,157	)	$	7,659	$	—	$	—	$	—
Securities gains (losses)	—			—		—		—		—
Interest and fee income	—			—		—		—		—
Noninterest income	—			—		4,166		2		(249		)
Total	$	(5,157	)	$	7,659	$	4,166	$	2	$	(249	)

Assets and liabilities under the fair value option

The following table presents the fair value and aggregate principal balance of certain assets and liabilities under the fair value option.

	September 30, 2017
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	584,829	$	564,106	$	20,723		$	602	$	608	$	(6	)
Loans held for investment	99,191		107,997		(8,806		)	10,086		11,781		(1,695		)

	December 31, 2016
	Total Loans							Loans that are 90 or more days past due
(dollar amounts in thousands)	Fair value carrying amount		Aggregate unpaid principal		Difference			Fair value carrying amount		Aggregate unpaid principal		Difference
Assets
Loans held for sale	$	438,224	$	433,760	$	4,464		$	—	$	—	$	—
Loans held for investment	82,319		91,998		(9,679		)	8,408		11,082		(2,674		)

The following tables present the net gains (losses) from fair value changes for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Net gains (losses) from fair value changes						Net gains (losses) from fair value changes
	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017		2016
Assets
Loans held for sale	$	(1,897	)	$	(4,439	)	$	11,719	$	9,080
Loans held for investment	187			—			1,617		—

Assets measured at fair value on a nonrecurring basis

assets measured at fair value on a nonrecurring basis were as shown in the table below.

			Fair Value Measurements Using
(dollar amounts in thousands)	Fair Value		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)		Total Gains/(Losses) Nine Months Ended September 30, 2017
MSRs	$	182,043	$	—	$	—	$	182,043	$	(318	)
Impaired loans	68,159		—		—		68,159		(3,976		)
Other real estate owned	42,041		—		—		42,041		(1,759		)

Quantitative information about significant unobservable level 3 fair value measurement inputs

	Quantitative Information about Level 3 Fair Value Measurements at September 30, 2017
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	11,753	Discounted cash flow	Constant prepayment rate	9.0% - 31.0% (12%)
				Spread over forward interest rate swap rates	8.0% - 10.0% (8.1%)
Derivative assets	8,425		Consensus Pricing	Net market price	-4.0% - 21.4% (1.8%)
Derivative liabilities	5,459			Estimated Pull through %	11.0% - 99.0% (79.0%)
Municipal securities	2,958,027		Discounted cash flow	Discount rate	0.0% - 10.3% (4.0%)
				Cumulative default	0.0% - 42.0% (4.9%)
				Loss given default	5.0% - 80.0% (23.7%)
Asset-backed securities	24,127		Discounted cash flow	Discount rate	1.3% - 6.8% (6.5%)
				Cumulative prepayment rate	0.0% - 72% (7.3%)
				Cumulative default	2.9% - 100% (8.6%)
				Loss given default	90% - 100% (97.8%)
Loans held for investment	40,483		Discounted cash flow	Discount rate	7.0% - 17.7% (8.2%)
Measured at fair value on a nonrecurring basis:
MSRs	182,043		Discounted cash flow	Constant prepayment rate	6.0% - 21.0% (8%)
				Spread over forward interest rate swap rates	1.8% - 20.0% (10.4%)
Impaired loans	68,159		Appraisal value	NA	NA
Other real estate owned	42,041		Appraisal value	NA	NA

	Quantitative Information about Level 3 Fair Value Measurements at December 31, 2016
(dollar amounts in thousands)	Fair Value		Valuation Technique	Significant Unobservable Input	Range (Weighted Average)
Measured at fair value on a recurring basis:
MSRs	$	13,747	Discounted cash flow	Constant prepayment rate	5.63% - 34.4% (10.9%)
				Spread over forward interest rate swap rates	3.0% - 9.2% (5.4%)
Derivative assets	5,747		Consensus Pricing	Net market price	-7.1% - 25.4% (1.1%)
Derivative liabilities	7,870			Estimated Pull through %	8.1% - 99.8% (76.9%)
Municipal securities	2,798,044		Discounted cash flow	Discount rate	0.0% - 10.0% (3.6%)
				Cumulative default	0.3% - 37.8% (4.0%)
				Loss given default	5.0% - 80.0% (24.1%)
Asset-backed securities	76,003		Discounted cash flow	Discount rate	5.0% - 12.0% (6.3%)
				Cumulative prepayment rate	0.0% - 73% (6.5%)
				Cumulative default	1.1% - 100% (11.2%)
				Loss given default	85% - 100% (96.3%)
				Cure given deferral	0.0% - 75.0% (36.2%)
Loans held for investment	47,880		Discounted cash flow	Discount rate	5.4% - 16.2% (5.6%)
Measured at fair value on a nonrecurring basis:
MSRs	171,309		Discounted cash flow	Constant prepayment rate	5.57% - 30.4% (7.8%)
				Spread over forward interest rate swap rates	4.2% - 20.0% (11.7%)
Impaired loans	53,818		Appraisal value	NA	NA
Other real estate owned	50,930		Appraisal value	NA	NA

Carrying amounts and estimated fair values of financial instruments

The following table provides the carrying amounts and estimated fair values of Huntington’s financial instruments that are carried either at fair value or cost at September 30, 2017 and December 31, 2016:

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial Assets
Cash and short-term assets	$	1,243,828	$	1,243,828	$	1,443,037	$	1,443,037
Trading account securities	88,488		88,488		133,295		133,295
Loans held for sale	651,734		657,270		512,951		515,640
Available-for-sale and other securities	15,453,061		15,453,061		15,562,837		15,562,837
Held-to-maturity securities	8,688,399		8,655,805		7,806,939		7,787,268
Net loans and direct financing leases	67,911,810		67,698,855		66,323,583		66,294,639
Derivatives	166,264		166,264		238,219		238,219
Financial Liabilities
Deposits	78,445,113		78,422,971		75,607,717		76,161,091
Short-term borrowings	1,829,549		1,829,549		3,692,654		3,692,654
Long-term debt	9,200,707		9,402,926		8,309,159		8,387,444
Derivatives	59,124		59,124		98,286		98,286

The following table presents the level in the fair value hierarchy for the estimated fair values of only Huntington’s financial instruments that are not already on the Unaudited Condensed Consolidated Balance Sheets at fair value at September 30, 2017 and December 31, 2016:

	Estimated Fair Value Measurements at Reporting Date Using						September 30, 2017
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	8,655,805	$	—	$	8,655,805
Net loans and direct financing leases	—		—		67,698,855		67,698,855
Financial Liabilities
Deposits	—		75,230,127		3,192,844		78,422,971
Short-term borrowings	4		—		1,829,545		1,829,549
Long-term debt	—		8,992,820		410,106		9,402,926

	Estimated Fair Value Measurements at Reporting Date Using						December 31, 2016
(dollar amounts in thousands)	Level 1		Level 2		Level 3
Financial Assets
Held-to-maturity securities	$	—	$	7,787,268	$	—	$	7,787,268
Net loans and direct financing leases	—		—		66,294,639		66,294,639
Financial Liabilities
Deposits	—		72,319,328		3,841,763		76,161,091
Short-term borrowings	474		—		3,692,180		3,692,654
Long-term debt	—		7,980,176		407,268		8,387,444

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Gross notional values of derivatives used in asset and liability management activities

The following table presents the gross notional values of derivatives used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016, identified by the underlying interest rate-sensitive instruments.

	September 30, 2017
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	1,325,000	$	1,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	7,425,000		—		7,425,000
Total notional value at September 30, 2017	$	8,375,000	$	1,325,000	$	9,700,000
	December 31, 2016
(dollar amounts in thousands)	Fair Value Hedges		Cash Flow Hedges		Total
Instruments associated with:
Loans	$	—	$	3,325,000	$	3,325,000
Subordinated notes	950,000		—		950,000
Long-term debt	6,525,000		—		6,525,000
Total notional value at December 31, 2016	$	7,475,000	$	3,325,000	$	10,800,000

Additional information about the interest rate swaps used in asset and liability management activities

The following table presents additional information about the interest rate swaps used in Huntington’s asset and liability management activities at September 30, 2017 and December 31, 2016.

	September 30, 2017
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	1,325,000	0.1	$	(1,239	)	0.72	%	1.23	%
Liability conversion swaps
Receive fixed—generic	8,375,000		2.8	(59,148		)	1.56		1.29
Total swap portfolio at September 30, 2017	$	9,700,000	2.3	$	(60,387	)
	December 31, 2016
							Weighted-Average Rate
(dollar amounts in thousands)	Notional Value		Average Maturity (years)	Fair Value			Receive		Pay
Asset conversion swaps
Receive fixed—generic	$	3,325,000	0.6	$	(2,060	)	1.04	%	0.91	%
Liability conversion swaps
Receive fixed—generic	7,475,000		3.1	(51,496		)	1.49		0.88
Total swap portfolio at December 31, 2016	$	10,800,000	2.3	$	(53,556	)

Asset and liability derivatives included in accrued income and other assets

	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Derivatives designated as Hedging Instruments
Interest rate contracts	$	32,837	$	93,224	$	46,440	$	99,996
Derivatives not designated as Hedging Instruments
Interest rate contracts (1)	198,471		112,534		232,653		140,475
Foreign exchange contracts	22,354		21,020		23,265		19,576
Commodities contracts	66,133		61,695		108,026		104,328
Equity contracts	1,031		5,177		9,775		6,272
Total Contracts	$	320,826	$	293,650	$	420,159	$	370,647

Increase or (decrease) to interest expense for derivatives designated as fair value hedges

The following table presents the change in fair value for derivatives designated as fair value hedges as well as the offsetting change in fair value on the hedged item for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,						Nine Months Ended September 30,
(dollar amounts in thousands)	2017			2016			2017			2016
Interest rate contracts
Change in fair value of interest rate swaps hedging deposits (1)	$	—		$	—		$	—		$	(82	)
Change in fair value of hedged deposits (1)	—			—			—			72
Change in fair value of interest rate swaps hedging subordinated notes (2)	(2,234		)	(9,688		)	(4,665		)	(2,880		)
Change in fair value of hedged subordinated notes (2)	3,615			10,400			6,782			3,591
Change in fair value of interest rate swaps hedging other long-term debt (2)	(6,431		)	(45,870		)	(880		)	37,179
Change in fair value of hedged other long-term debt (2)	7,152			42,647			(1,226		)	(38,187		)

(1) Effective portion of the hedging relationship is recognized in Interest expense—deposits in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

(2) Effective portion of the hedging relationship is recognized in Interest expense—subordinated notes and other long-term debt in the Unaudited Condensed Consolidated Statements of Income. Any resulting ineffective portion of the hedging relationship is recognized in noninterest income in the Unaudited Condensed Consolidated Statements of Income.

Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges

The following table presents the gains and (losses) recognized in OCI and the location in the Unaudited Condensed Consolidated Statements of Income of gains and (losses) reclassified from OCI into earnings for derivatives designated as effective cash flow hedges for the three-month and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)					Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Three Months Ended September 30,						Three Months Ended September 30,
(dollar amounts in thousands)	2017		2016				2017		2016
Interest rate contracts
Loans	$	1,225	$	(5,311	)	Interest and fee income - loans and leases	$	144	$	123
Investment Securities	—		—			Noninterest income - other income	—		—
Total	$	1,225	$	(5,311	)		$	144	$	123

Derivatives in cash flow hedging relationships	Amount of gain or (loss) recognized in OCI on derivatives (effective portion) (after-tax)				Location of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	Amount of (gain) or loss reclassified from accumulated OCI into earnings (effective portion)
	Nine Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	828	$	5,231	Interest and fee income - loans and leases	$	1,131	$	(770	)
Investment Securities	—		—		Noninterest income - other income	—		1
	$	828	$	5,231		$	1,131	$	(769	)

Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as fair value and cash flow hedges

The following table presents the gains and (losses) recognized in noninterest income for the ineffective portion of interest rate contracts for derivatives designated as cash flow hedges for the three and nine-month periods ended September 30, 2017 and 2016.

Derivatives in cash flow hedging relationships	Three Months Ended September 30,					Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016			2017		2016
Interest rate contracts
Loans	$	359	$	(371	)	$	225	$	6

Derivative assets and liabilities used in mortgage banking activities [Table Text Block]

The following table summarizes the derivative assets and liabilities used in mortgage banking activities:

Derivatives used in mortgage banking activities	September 30, 2017				December 31, 2016
(dollar amounts in thousands)	Asset		Liability		Asset		Liability
Interest rate lock agreements	$	8,425	$	282	$	5,747	$	1,598
Forward trades and options	1,562		1,782		13,319		1,173
Total derivatives used in mortgage banking activities	$	9,987	$	2,064	$	19,066	$	2,771

Offsetting of financial liabilities and derivative liabilities

Offsetting of Financial Liabilities and Derivative Liabilities
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of liabilities presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized liabilities							Financial instruments			Cash collateral delivered			Net amount
September 30, 2017	Derivatives	$	293,650	$	(234,526	)	$	59,124	$	—		$	(26,766	)	$	32,358
December 31, 2016	Derivatives	370,647		(272,361		)	98,286		(7,550		)	(23,943		)	66,793

Offsetting of financial assets and derivatives assets

The following tables present the gross amounts of these assets and liabilities with any offsets to arrive at the net amounts recognized in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

Offsetting of Financial Liabilities and Derivative Assets
				Gross amounts offset in the condensed consolidated balance sheets			Net amounts of assets presented in the condensed consolidated balance sheets		Gross amounts not offset in the condensed consolidated balance sheets
(dollar amounts in thousands)		Gross amounts of recognized assets							Financial instruments			Cash collateral received			Net amount
September 30, 2017	Derivatives	$	320,826	$	(154,562	)	$	166,264	$	(23,350	)	$	(16,895	)	$	126,019
December 31, 2016	Derivatives	420,159		(181,940		)	238,219		(34,328		)	(5,428		)	198,463

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VIEs (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Carrying amount and classification of the trusts assets and liabilities

The following tables provide a summary of the assets and liabilities included in Huntington’s Unaudited Condensed Consolidated Financial Statements, as well as the maximum exposure to losses, associated with its interests related to unconsolidated VIEs for which Huntington holds an interest, but is not the primary beneficiary to the VIE at September 30, 2017, and December 31, 2016.

	September 30, 2017
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	8,674	$	—	$	8,674
2015-1 Automobile Trust	1,506		—		1,506
Trust Preferred Securities	13,919		252,577		—
Low Income Housing Tax Credit Partnerships	638,171		348,733		638,171
Other Investments	108,556		48,339		108,556
Total	$	770,826	$	649,649	$	756,907

	December 31, 2016
(dollar amounts in thousands)	Total Assets		Total Liabilities		Maximum Exposure to Loss
2016-1 Automobile Trust	$	14,770	$	—	$	14,770
2015-1 Automobile Trust	2,227		—		2,227
Trust Preferred Securities	13,919		252,552		—
Low Income Housing Tax Credit Partnerships	576,880		292,721		576,880
Other Investments	79,195		42,316		79,195
Total	$	686,991	$	587,589	$	673,072

The following tables present the carrying amount and classification of the consolidated trusts’ assets and liabilities that were included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2017 and December 31, 2016.

	September 30, 2017
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,569	$	—	$	1,569
Net loans and leases	33,148		—		33,148
Accrued income and other assets	—		269		269
Total assets	$	34,717	$	269	$	34,986
Liabilities:
Other long-term debt	$	28,120	$	—	$	28,120
Accrued interest and other liabilities	—		269		269
Total liabilities	28,120		269		28,389
Equity:
Beneficial Interest owned by third party	6,597		—		6,597
Total liabilities and equity	$	34,717	$	269	$	34,986

	December 31, 2016
	Huntington Technology Funding Trust		Other Consolidated VIEs		Total
(dollar amounts in thousands)	Series 2014A
Assets:
Cash	$	1,564	$	—	$	1,564
Net loans and leases	69,825		—		69,825
Accrued income and other assets	—		281		281
Total assets	$	71,389	$	281	$	71,670
Liabilities:
Other long-term debt	$	57,494	$	—	$	57,494
Accrued interest and other liabilities	—		281		281
Total liabilities	57,494		281		57,775
Equity:
Beneficial Interest owned by third party	13,895		—		13,895
Total liabilities and equity	$	71,389	$	281	$	71,670

Summary of Outstanding Trust Preferred Securities

A list of trust preferred securities outstanding at September 30, 2017 follows.

(dollar amounts in thousands)	Rate			Principal amount of subordinated note/ debenture issued to trust (1)		Investment in unconsolidated subsidiary
Huntington Capital I	2.01	%	(2)	$	69,730	$	6,186
Huntington Capital II	1.95		(3)	32,093		3,093
Sky Financial Capital Trust III	2.74		(4)	72,165		2,165
Sky Financial Capital Trust IV	2.70		(4)	74,320		2,320
Camco Financial Trust	3.76		(5)	4,269		155
Total				$	252,577	$	13,919

(1) Represents the principal amount of debentures issued to each trust, including unamortized original issue discount.

(2) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.70%.

(3) Variable effective rate at September 30, 2017, based on three-month LIBOR +0.625%.

(4) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.40%.

(5) Variable effective rate at September 30, 2017, based on three-month LIBOR +1.33%.

Affordable housing tax credit investments

The following table presents the balances of Huntington’s affordable housing tax credit investments and related unfunded commitments at September 30, 2017 and December 31, 2016.

(dollar amounts in thousands)	September 30, 2017			December 31, 2016
Affordable housing tax credit investments	$	980,984		$	877,237
Less: amortization	(342,813		)	(300,357		)
Net affordable housing tax credit investments	$	638,171		$	576,880
Unfunded commitments	$	348,733		$	292,721

The following table presents other information related to Huntington’s affordable housing tax credit investments for the three-month and nine-month periods ended September 30, 2017 and 2016.

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollar amounts in thousands)	2017		2016		2017		2016
Tax credits and other tax benefits recognized	$	22,471	$	21,200	$	68,426	$	57,634
Proportional amortization method
Tax credit amortization expense included in provision for income taxes	17,292		13,608		51,474		38,513
Equity method
Tax credit investment (gains) losses included in noninterest income	—		132		—		396

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COMMITMENTS AND CONTINGENT LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Contract amounts of various commitments to extend credit

In the ordinary course of business, Huntington makes various commitments to extend credit that are not reflected in the Unaudited Condensed Consolidated Financial Statements. The contract amounts of these financial agreements at September 30, 2017 and December 31, 2016, were as listed in the following table.

(dollar amounts in thousands)	September 30, 2017		December 31, 2016
Contract amount representing credit risk:
Commitments to extend credit
Commercial	$	16,056,609	$	15,190,056
Consumer	12,977,175		12,235,943
Commercial real estate	1,373,127		1,697,671
Standby letters-of-credit	547,689		637,182
Commercial letters-of-credit	16,815		4,610

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SEGMENT REPORTING (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Listed in the table below is certain operating basis financial information reconciled to Huntington’s September 30, 2017, December 31, 2016, and September 30, 2016, reported results by business segment.

	Three Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	426,752	$	171,448	$	139,870	$	49,596	$	(29,233	)	$	758,433
Provision for (reduction in allowance) credit losses	24,089		9,580		9,705		216		—			43,590
Noninterest income	189,378		59,121		10,969		46,215		24,414			330,097
Noninterest expense	415,874		100,003		55,354		58,237		50,960			680,428
Income taxes	61,658		42,345		30,022		13,076		(57,157		)	89,944
Net income	$	114,509	$	78,641	$	55,758	$	24,282	$	1,378		$	274,568
2016
Net interest income	$	349,283	$	143,023	$	126,489	$	41,971	$	(35,376	)	$	625,390
Provision for (reduction in allowance) credit losses	12,724		23,788		25,615		1,663		15			63,805
Noninterest income	177,234		54,744		8,001		45,339		17,097			302,415
Noninterest expense	349,470		87,892		44,331		57,473		173,081			712,247
Income taxes	57,513		30,130		22,590		9,861		(95,345		)	24,749
Net income	$	106,810	$	55,957	$	41,954	$	18,313	$	(96,030	)	$	127,004

	Nine Months Ended September 30,
Income Statements	Consumer & Business Banking		Commercial Banking		CREVF		RBHPCG		Treasury / Other			Huntington Consolidated
(dollar amounts in thousands)
2017
Net interest income	$	1,255,617	$	514,900	$	419,556	$	145,089	$	(102,242	)	$	2,232,920
Provision for credit losses	74,270		21,378		40,047		510		1			136,206
Noninterest income	544,445		176,609		34,750		140,610		71,364			967,778
Noninterest expense	1,242,152		301,385		163,989		182,171		192,517			2,082,214
Income taxes	169,274		129,061		87,594		36,056		(194,110		)	227,875
Net income	$	314,366	$	239,685	$	162,676	$	66,962	$	(29,286	)	$	754,403
2016
Net interest income	$	911,706	$	355,263	$	317,704	$	112,473	$	(62,809	)	$	1,634,337
Provision for credit losses	43,474		53,212		18,706		490		14			115,896
Noninterest income	459,732		150,228		25,951		126,245		53,238			815,394
Noninterest expense	967,417		246,941		125,254		166,645		220,731			1,726,988
Income taxes	126,191		71,868		69,893		25,054		(159,017		)	133,989
Net income	$	234,356	$	133,470	$	129,802	$	46,529	$	(71,299	)	$	472,858

	Assets at				Deposits at
(dollar amounts in thousands)	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Consumer & Business Banking	$	25,989,043	$	25,332,635	$	45,694,477	$	45,355,745
Commercial Banking	24,199,091		24,121,689		20,795,143		18,053,208
CREVF	24,723,324		23,576,832		2,052,274		1,893,072
RBHPCG	5,695,880		5,327,622		5,944,240		6,214,250
Treasury / Other	21,380,788		21,355,319		3,958,979		4,091,442
Total	$	101,988,126	$	99,714,097	$	78,445,113	$	75,607,717

Segment Disclosure of Assets and Deposits

	Assets at				Deposits at
(dollar amounts in thousands)	September 30, 2017		December 31, 2016		September 30, 2017		December 31, 2016
Consumer & Business Banking	$	25,989,043	$	25,332,635	$	45,694,477	$	45,355,745
Commercial Banking	24,199,091		24,121,689		20,795,143		18,053,208
CREVF	24,723,324		23,576,832		2,052,274		1,893,072
RBHPCG	5,695,880		5,327,622		5,944,240		6,214,250
Treasury / Other	21,380,788		21,355,319		3,958,979		4,091,442
Total	$	101,988,126	$	99,714,097	$	78,445,113	$	75,607,717

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)	9 Months Ended
	Sep. 30, 2017 USD ($) reserve	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable net premium	$ 295,000,000		$ 120,000,000
Consumer loans	99,191,000		82,319,000
Allowance for loan and lease losses	$ (675,486,000)	$ (667,996,000)	(638,413,000)	$ (616,898,000)	$ (623,064,000)	$ (597,843,000)
Number of days past due	30 days
Allowance number of reserves | reserve	2
Collateral for secured borrowings	$ 32,000,000,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ (474,122,000)	(474,576,000)	(451,091,000)	(431,795,000)	(424,507,000)	(398,753,000)
Threshold period past due for nonperforming status	90 days
Threshold outstanding balance for quarterly impairment evaluation	$ 1,000,000.0
Threshold period past due for write-off	90 days
Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 0		0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses	$ (201,364,000)	$ (193,420,000)	(187,322,000)	$ (185,103,000)	$ (198,557,000)	$ (199,090,000)
Threshold period past due for write-off	120 days
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 1,178,000		2,154,000
Consumer | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	2,273,000		3,273,000
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	94,387,000		74,936,000
Consumer | RV and Marine FInance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	1,135,000		1,519,000
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 218,000		$ 437,000

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Loan and Lease Portfolio Composition (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Loan and Lease Portfolio
Commercial and industrial		$ 27,469,344		$ 28,058,712
Commercial real estate		7,206,096		7,300,901
Automobile		11,876,033		10,968,782
Home equity		9,984,728		10,105,774
Residential mortgage		8,616,059		7,724,961
Recreation Finance		2,371,065		1,846,447
Other consumer		1,063,971		956,419
Loans and leases	[1]	68,587,296		66,961,996
Allowance for loan and lease losses		(675,486)	$ (667,996)	(638,413)	$ (616,898)	$ (623,064)	$ (597,843)
Net loans and leases		$ 67,911,810		$ 66,323,583

[1] Amounts represent loans for which Huntington has elected the fair value option.

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Balances at Acquisition (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
FirstMerit Corporation
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Accretable yield	$ (35,210)	$ (36,509)	$ (36,669)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Accretable Yield Roll (Details) - FirstMerit Corporation - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 36,509	$ 36,669
Accretion	(4,343)	(13,833)
Reclassification (to) from nonaccretable difference	3,044	12,374
Balance, end of period	$ 35,210	$ 35,210

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Ending and Unpaid Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Ending Balance	$ 64,989		$ 102,380
Loans and Leases Receivable, Allowance	675,486	$ 667,996	638,413	$ 616,898	$ 623,064	$ 597,843
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	474,122	$ 474,576	451,091	$ 431,795	$ 424,507	$ 398,753
Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Ending Balance	48,606		68,338
FirstMerit Corporation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Ending Balance	64,989		102,380
Purchased Credit Impaired, Unpaid Balance	101,806		156,351
FirstMerit Corporation | Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Ending Balance	48,606		68,338
Purchased Credit Impaired, Unpaid Balance	72,117		100,031
FirstMerit Corporation | Commercial | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Ending Balance	16,383		34,042
Purchased Credit Impaired, Unpaid Balance	$ 29,689		$ 56,320

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Nonaccrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	$ 338,245	$ 423,003
Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	169,751	234,184
Commercial | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	17,397
Commercial | Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans		20,508
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	4,076	5,766
Consumer | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	71,353	71,798
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	75,251	90,502
Consumer | RV and Marine FInance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	309	245
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total nonaccrual loans	$ 108	$ 0

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - NALs Past Due (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 709,080	$ 718,203
Current		67,714,036	66,059,094
Purchased Credit Impaired		64,989	102,380
Consumer loans		99,191	82,319
Loans and leases	[1]	68,587,296	66,961,996
90 or more days past due and accruing		118,669	129,362
30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		325,359	320,341
60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		101,627	108,443
90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		282,094	289,419
Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		124,994	136,362
Current		27,295,744	27,854,012
Purchased Credit Impaired		48,606	68,338
Consumer loans		0	0
Loans and leases		27,469,344	28,058,712
90 or more days past due and accruing		14,083	18,148
Commercial | Commercial and Industrial | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		36,505	42,052
Commercial | Commercial and Industrial | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		10,654	20,136
Commercial | Commercial and Industrial | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		77,835	74,174
Commercial | Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		58,040	54,048
Current		7,131,673	7,212,811
Purchased Credit Impaired		16,383	34,042
Consumer loans		0	0
Loans and leases		7,206,096	7,300,901
90 or more days past due and accruing		9,550	17,215
Commercial | Real Estate Loan [Member] | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		35,444	21,187
Commercial | Real Estate Loan [Member] | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2,586	3,202
Commercial | Real Estate Loan [Member] | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		20,010	29,659
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		107,073	103,913
Current		11,767,782	10,862,715
Purchased Credit Impaired		0	0
Consumer loans		1,178	2,154
Loans and leases		11,876,033	10,968,782
90 or more days past due and accruing		10,239	10,182
Consumer | Automobile | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		79,457	76,283
Consumer | Automobile | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		17,167	17,188
Consumer | Automobile | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		10,449	10,442
Consumer | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		125,096	115,804
Current		9,857,359	9,986,697
Purchased Credit Impaired		0	0
Consumer loans		2,273	3,273
Loans and leases		9,984,728	10,105,774
90 or more days past due and accruing		16,150	11,508
Consumer | Home Equity | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		41,748	38,899
Consumer | Home Equity | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		19,601	23,903
Consumer | Home Equity | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		63,747	53,002
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		260,930	276,611
Current		8,260,742	7,373,414
Purchased Credit Impaired		0	0
Consumer loans		94,387	74,936
Loans and leases		8,616,059	7,724,961
90 or more days past due and accruing		62,832	66,952
Consumer | Residential Mortgage | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		111,722	122,469
Consumer | Residential Mortgage | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		45,041	37,460
Consumer | Residential Mortgage | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		104,167	116,682
Consumer | RV and Marine FInance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		14,621	13,805
Current		2,355,309	1,831,123
Purchased Credit Impaired		0	0
Consumer loans		1,135	1,519
Loans and leases		2,371,065	1,846,447
90 or more days past due and accruing		2,063	1,462
Consumer | RV and Marine FInance | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		10,303	10,009
Consumer | RV and Marine FInance | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2,184	2,230
Consumer | RV and Marine FInance | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2,134	1,566
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		18,326	17,660
Current		1,045,427	938,322
Purchased Credit Impaired		0	0
Consumer loans		218	437
Loans and leases		1,063,971	956,419
90 or more days past due and accruing		3,752	3,895
Consumer | Other Consumer | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		10,180	9,442
Consumer | Other Consumer | 60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		4,394	4,324
Consumer | Other Consumer | 90 or more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 3,752	$ 3,894

[1] Amounts represent loans for which Huntington has elected the fair value option.

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	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]
Provision For (Reduction In Allowance) Unfunded Loan Commitments and Letters of Credit.	$ (6,793)	$ 10,282	$ (19,313)	$ 11,949
Portion of ALLL balance:
ALLL balance, beginning of period	667,996	623,064	638,413	597,843
Loan charge-offs	(64,772)	(59,268)	(191,935)	(162,505)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	21,880	19,203	73,565	97,133
Provision for credit losses	43,590	63,805	136,206	115,896
Provision For (Reduction In Allowance) Loan and Lease Losses.	50,383	53,523	155,519	103,947
Allowance for loans sold or transferred to loans held for sale	(1)	(19,624)	(76)	(19,520)
ALLL balance, end of period	675,486	616,898	675,486	616,898
AULC Balance, beginning of period	85,359	73,748	97,879	72,081
AULC Balance, end of period	78,566	88,433	78,566	88,433
ACL balance, end of period	754,052	705,331	754,052	705,331
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		4,403		4,403
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision For (Reduction In Allowance) Unfunded Loan Commitments and Letters of Credit.	(6,528)	9,739	(10,244)	10,008
Portion of ALLL balance:
ALLL balance, beginning of period	474,576	424,507	451,091	398,753
Loan charge-offs	(19,278)	(24,839)	(58,051)	(70,721)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	10,015	8,312	33,619	62,127
Provision for credit losses		36,689	47,539	54,510
Provision For (Reduction In Allowance) Loan and Lease Losses.	8,810
Allowance for loans sold or transferred to loans held for sale	(1)	(12,874)	(76)	(12,874)
ALLL balance, end of period	474,122	431,795	474,122	431,795
AULC Balance, beginning of period	82,827	63,717	86,543	63,448
AULC Balance, end of period	76,299	77,859	76,299	77,859
ACL balance, end of period	550,421	509,654	550,421	509,654
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		4,403		4,403
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision For (Reduction In Allowance) Unfunded Loan Commitments and Letters of Credit.	(265)	543	(9,069)	1,941
Portion of ALLL balance:
ALLL balance, beginning of period	193,420	198,557	187,322	199,090
Loan charge-offs	(45,494)	(34,429)	(133,884)	(91,784)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	11,865	10,891	39,946	35,006
Provision for credit losses		16,834		49,437
Provision For (Reduction In Allowance) Loan and Lease Losses.	41,573		107,980
Allowance for loans sold or transferred to loans held for sale	0	(6,750)	0	(6,646)
ALLL balance, end of period	201,364	185,103	201,364	185,103
AULC Balance, beginning of period	2,532	10,031	11,336	8,633
AULC Balance, end of period	2,267	10,574	2,267	10,574
ACL balance, end of period	$ 203,631	195,677	$ 203,631	195,677
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		$ 0		$ 0

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	$ 27,469,344	$ 28,058,712
Commercial real estate	7,206,096	7,300,901
Automobile	11,876,033	10,968,782
Home equity	9,984,728	10,105,774
Residential mortgage	8,616,059	7,724,961
Other consumer	1,063,971	956,419
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	27,469,344	28,058,712
Commercial real estate	7,206,096	7,300,901
Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	25,447,805	26,211,885
Commercial real estate	6,934,670	7,042,304
Commercial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	1,189,789	1,028,819
Commercial real estate	126,352	159,098
Commercial | OLEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	803,540	810,287
Commercial real estate	144,122	96,975
Commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	28,210	7,721
Commercial real estate	952	2,524
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Automobile	11,874,855	10,966,628
Home equity	9,982,455	10,102,501
Residential mortgage	8,521,672	7,650,025
RV and marine finance	2,369,930	1,844,928
Other consumer	1,063,753	955,982
Consumer | Greater than 750
Accounts, Notes, Loans and Financing Receivable [Line Items]
Automobile	5,939,409	5,369,085
Home equity	6,359,778	6,280,328
Residential mortgage	5,311,993	4,662,777
RV and marine finance	1,385,176	1,064,143
Other consumer	404,047	346,867
Consumer | 650-749
Accounts, Notes, Loans and Financing Receivable [Line Items]
Automobile	4,278,062	4,043,611
Home equity	2,985,933	2,891,330
Residential mortgage	2,479,820	2,285,121
RV and marine finance	853,545	644,039
Other consumer	510,804	455,959
Consumer | Less Than 650
Accounts, Notes, Loans and Financing Receivable [Line Items]
Automobile	1,371,574	1,298,460
Home equity	621,817	637,560
Residential mortgage	599,055	615,067
RV and marine finance	91,302	72,995
Other consumer	136,346	133,243
Consumer | Other FICO score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Automobile	285,810	255,472
Home equity	14,927	293,283
Residential mortgage	130,804	87,060
RV and marine finance	39,907	63,751
Other consumer	$ 12,556	$ 19,913

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	$ 638,774		$ 616,867
Attributable to loans individually evaluated for impairment	36,712		21,546
Total ALLL balance	675,486	$ 667,996	638,413	$ 616,898	$ 623,064	$ 597,843
Portion of loan and lease ending balance:
Collectively evaluated for impairment	67,234,966		65,903,783
Individually evaluated for impairment	1,188,148		873,514
Financing Receivable Evaluated For Impairment	68,488,103		66,879,677
Commercial
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	451,284		440,566
Attributable to loans individually evaluated for impairment	22,838		10,525
Total ALLL balance	474,122	474,576	451,091	431,795	424,507	398,753
Portion of loan and lease ending balance:
Collectively evaluated for impairment	34,044,110		34,841,609
Individually evaluated for impairment	566,340		415,624
Financing Receivable Evaluated For Impairment	34,675,439		35,359,613
Consumer
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	187,490		176,301
Attributable to loans individually evaluated for impairment	13,874		11,021
Total ALLL balance	201,364	$ 193,420	187,322	$ 185,103	$ 198,557	$ 199,090
Portion of loan and lease ending balance:
Collectively evaluated for impairment	33,190,856		31,062,174
Individually evaluated for impairment	621,808		457,890
Financing Receivable Evaluated For Impairment	33,812,664		31,520,064
Purchased credit-impaired
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	0		0
Portion of loan and lease ending balance:
Collectively evaluated for impairment	64,989		102,380
Purchased credit-impaired | Commercial
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	0		0
Portion of loan and lease ending balance:
Collectively evaluated for impairment	64,989		102,380
Purchased credit-impaired | Consumer
Portion of ALLL balance:
Attributable to loans collectively evaluated for impairment	0		0
Portion of loan and lease ending balance:
Collectively evaluated for impairment	$ 0		$ 0

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans with no allowance recorded	$ 0		$ 0		$ 0
Average balance of impaired loans with no allowance recorded	0	$ 0	0	$ 0
Interest income recognized on impaired loans with no allowance recorded	0	0	0	0
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans with no allowance recorded	0		0		0
Average balance of impaired loans with no allowance recorded	0	0	0	0
Interest income recognized on impaired loans with no allowance recorded	0	0	0	0
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans with no allowance recorded	0		0		0
Average balance of impaired loans with no allowance recorded	0	0	0	0
Interest income recognized on impaired loans with no allowance recorded	0	0	0	0
RV and Marine FInance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of impaired loans with no allowance recorded	0		0
Average balance of impaired loans with no allowance recorded	0		0
Interest income recognized on impaired loans with no allowance recorded	0		0
Commercial | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	299,349		299,349		299,606
Unpaid principal balance of impaired loans with no allowance recorded	324,474		324,474		358,712
Average balance of impaired loans with no allowance recorded	294,513	305,956	227,611	290,163
Interest income recognized on impaired loans with no allowance recorded	4,969	2,235	7,467	4,858
Ending balance of impaired loans with allowance recorded	213,520		213,520		406,243
Unpaid principal balance of impaired loans with allowance recorded	245,328		245,328		448,121
Related Allowance	19,958		19,958		22,259
Impaired Financing Receivable, Average Recorded Investment	517,258	587,890	561,908	564,425
Impaired Financing Receivable, Interest Income, Accrual Method	6,919	3,866	20,179	10,318
Average balance of impaired loans with allowance recorded	222,745	281,934	334,297	274,262
Interest income recognized on impaired loans with allowance recorded	1,950	1,631	12,712	5,460
Loans considered impaired due to status as a TDR	365,000		365,000		317,000
Impaired Financing Receivable, Recorded Investment	512,869		512,869		705,849
Impaired Financing Receivable, Unpaid Principal Balance	569,802		569,802		806,833
Commercial | Real Estate Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	65,382		65,382		88,817
Unpaid principal balance of impaired loans with no allowance recorded	92,215		92,215		126,152
Average balance of impaired loans with no allowance recorded		80,000		58,666
Interest income recognized on impaired loans with no allowance recorded		907		2,257
Ending balance of impaired loans with allowance recorded	53,078		53,078
Unpaid principal balance of impaired loans with allowance recorded	60,366		60,366
Related Allowance	2,880		2,880
Loans considered impaired due to status as a TDR	84,000		84,000		81,000
Impaired Financing Receivable, Recorded Investment	118,460		118,460
Impaired Financing Receivable, Unpaid Principal Balance	152,581		152,581
Commercial | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average balance of impaired loans with no allowance recorded	71,277		80,388
Interest income recognized on impaired loans with no allowance recorded	1,825		5,762
Ending balance of impaired loans with allowance recorded					97,238
Unpaid principal balance of impaired loans with allowance recorded					107,512
Related Allowance					3,434
Impaired Financing Receivable, Average Recorded Investment	111,949	129,140	134,740	108,253
Impaired Financing Receivable, Interest Income, Accrual Method	2,293	1,428	7,150	4,152
Average balance of impaired loans with allowance recorded	40,672	49,140	54,352	49,587
Interest income recognized on impaired loans with allowance recorded	468	521	1,388	1,895
Impaired Financing Receivable, Recorded Investment					186,055
Impaired Financing Receivable, Unpaid Principal Balance					233,664
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	0		0		0
Ending balance of impaired loans with allowance recorded	33,049		33,049		30,961
Unpaid principal balance of impaired loans with allowance recorded	33,049		33,049		31,298
Related Allowance	1,683		1,683		1,850
Impaired Financing Receivable, Average Recorded Investment	32,740	31,540	32,293	31,912
Impaired Financing Receivable, Interest Income, Accrual Method	496	541	1,576	1,643
Average balance of impaired loans with allowance recorded	32,740	31,540	32,293	31,912
Interest income recognized on impaired loans with allowance recorded	496	541	1,576	1,643
Impaired Financing Receivable, Recorded Investment	33,049		33,049		30,961
Impaired Financing Receivable, Unpaid Principal Balance	33,049		33,049		31,298
Consumer | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	0		0		0
Ending balance of impaired loans with allowance recorded	335,763		335,763		319,404
Unpaid principal balance of impaired loans with allowance recorded	367,870		367,870		352,722
Related Allowance	14,486		14,486		15,032
Impaired Financing Receivable, Average Recorded Investment	330,784	284,512	326,932	267,264
Impaired Financing Receivable, Interest Income, Accrual Method	3,713	3,453	11,639	9,382
Average balance of impaired loans with allowance recorded	330,784	284,512	326,932	267,264
Interest income recognized on impaired loans with allowance recorded	3,713	3,453	11,639	9,382
Impaired Financing Receivable, Recorded Investment	335,763		335,763		319,404
Impaired Financing Receivable, Unpaid Principal Balance	367,870		367,870		352,722
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	0		0		0
Ending balance of impaired loans with allowance recorded	310,440		310,440		327,753
Unpaid principal balance of impaired loans with allowance recorded	341,724		341,724		363,099
Related Allowance	8,060		8,060		12,849
Impaired Financing Receivable, Average Recorded Investment	319,745	344,237	329,193	353,259
Impaired Financing Receivable, Interest Income, Accrual Method	2,837	2,978	8,851	9,041
Average balance of impaired loans with allowance recorded	319,745	344,237	329,193	353,259
Interest income recognized on impaired loans with allowance recorded	2,837	2,978	8,851	9,041
Impaired Financing Receivable, Recorded Investment	310,440		310,440		327,753
Impaired Financing Receivable, Unpaid Principal Balance	341,724		341,724		363,099
Consumer | RV and Marine FInance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	0		0		0
Unpaid principal balance of impaired loans with no allowance recorded					0
Average balance of impaired loans with no allowance recorded		0		0
Interest income recognized on impaired loans with no allowance recorded		0		0
Ending balance of impaired loans with allowance recorded	1,520		1,520		0
Unpaid principal balance of impaired loans with allowance recorded	1,520		1,520		0
Related Allowance	88		88		0
Impaired Financing Receivable, Average Recorded Investment	1,425	0	884	0
Impaired Financing Receivable, Interest Income, Accrual Method	23	0	58	0
Average balance of impaired loans with allowance recorded	1,425	0	884	0
Interest income recognized on impaired loans with allowance recorded	23	0	58	0
Impaired Financing Receivable, Recorded Investment	1,520		1,520		0
Impaired Financing Receivable, Unpaid Principal Balance	1,520		1,520		0
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance of impaired loans with no allowance recorded	0		0		0
Unpaid principal balance of impaired loans with no allowance recorded	0		0		0
Average balance of impaired loans with no allowance recorded	0	0	0	0
Interest income recognized on impaired loans with no allowance recorded	0	0	0	0
Ending balance of impaired loans with allowance recorded	6,456		6,456		3,897
Unpaid principal balance of impaired loans with allowance recorded	6,456		6,456		3,897
Related Allowance	1,288		1,288		260
Impaired Financing Receivable, Average Recorded Investment	6,944	4,454	7,117	4,627
Impaired Financing Receivable, Interest Income, Accrual Method	47	58	184	178
Average balance of impaired loans with allowance recorded	6,944	4,454	7,117	4,627
Interest income recognized on impaired loans with allowance recorded	47	$ 58	184	$ 178
Impaired Financing Receivable, Recorded Investment	6,456		6,456		3,897
Impaired Financing Receivable, Unpaid Principal Balance	$ 6,456		$ 6,456		$ 3,897

XML

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - TDRs (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 USD ($) contract	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	2,203	1,271	4,809	3,782
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 195,126,000	$ 126,416,000	$ 596,586,000	$ 497,507,000
New Troubled Debt Restructuring, Financial effects of modification	$ 1,233,000	$ 795,000	$ 10,618,000	$ 6,209,000
Commercial | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts	6	2	8	4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 817,000	$ 122,000	$ 854,000	$ 161,000
New Troubled Debt Restructuring, Financial effects of modification	0	$ (6,000)	(6,000)	$ (5,000)
Commercial | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract		246		629
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	138,381,000	$ 89,100,000	418,924,000	$ 345,691,000
New Troubled Debt Restructuring, Financial effects of modification	$ 837,000	$ 1,450,000	$ 8,695,000	$ 4,368,000
Commercial | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	6	4	16
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 711,000	$ 380,000	$ 1,801,000
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 2,000	$ 27,000	$ 4,000
Commercial | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	277	254	747	649
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 139,198,000	$ 89,933,000	$ 420,158,000	$ 347,653,000
New Troubled Debt Restructuring, Financial effects of modification	$ 837,000	$ 1,446,000	$ 8,716,000	$ 4,367,000
Commercial | Commercial and Industrial | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	271		735
Commercial | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	28	30	71	95
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 17,811,000	$ 11,183,000	$ 74,101,000	$ 61,394,000
New Troubled Debt Restructuring, Financial effects of modification	$ (133,000)	$ 546,000	$ 682,000	$ 1,812,000
Commercial | Commercial Real Estate | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	1
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 84,000
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ 0
Commercial | Commercial Real Estate | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	28	30	71	90
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 17,811,000	$ 11,183,000	$ 74,101,000	$ 60,995,000
New Troubled Debt Restructuring, Financial effects of modification	$ (133,000)	$ 546,000	$ 682,000	$ 1,828,000
Commercial | Commercial Real Estate | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 315,000
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ (16,000)
Consumer | Automobile
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	797	692	2,065	1,967
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 6,577,000	$ 6,304,000	$ 17,283,000	$ 17,518,000
New Troubled Debt Restructuring, Financial effects of modification	$ (196,000)	$ (719,000)	$ (427,000)	$ (1,377,000)
Consumer | Automobile | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	5	4	24	11
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 72,000	$ 26,000	$ 308,000	$ 132,000
New Troubled Debt Restructuring, Financial effects of modification	$ (3,000)	$ (3,000)	$ (9,000)	$ (10,000)
Consumer | Automobile | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	487	452	1,298	1,159
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 3,943,000	$ 4,438,000	$ 11,097,000	$ 11,002,000
New Troubled Debt Restructuring, Financial effects of modification	$ (124,000)	$ (559,000)	$ (302,000)	$ (981,000)
Consumer | Automobile | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	305	236	743	797
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 2,562,000	$ 1,840,000	$ 5,878,000	$ 6,384,000
New Troubled Debt Restructuring, Financial effects of modification	$ (69,000)	$ (157,000)	$ (116,000)	$ (386,000)
Consumer | Automobile | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ 0
Consumer | Home Equity
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	247	194	739	724
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 14,780,000	$ 9,487,000	$ 39,993,000	$ 35,500,000
New Troubled Debt Restructuring, Financial effects of modification	$ 473,000	$ (763,000)	$ 812,000	$ 162,000
Consumer | Home Equity | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	8	14	25	43
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 376,000	$ 352,000	$ 1,444,000	$ 2,363,000
New Troubled Debt Restructuring, Financial effects of modification	$ (11,000)	$ (10,000)	$ (24,000)	$ (103,000)
Consumer | Home Equity | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	160	110	401	466
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 11,676,000	$ 6,740,000	$ 25,544,000	$ 25,031,000
New Troubled Debt Restructuring, Financial effects of modification	$ 1,131,000	$ 574,000	$ 2,559,000	$ 2,592,000
Consumer | Home Equity | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	79	70	243	215
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 2,728,000	$ 2,395,000	$ 8,764,000	$ 8,106,000
New Troubled Debt Restructuring, Financial effects of modification	$ (647,000)	$ (1,327,000)	$ (2,049,000)	$ (2,327,000)
Consumer | Home Equity | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	70	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 4,241,000	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 326,000	$ 0
Consumer | Residential Mortgage
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	123	99	375	333
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 13,002,000	$ 9,487,000	$ 39,535,000	$ 34,795,000
New Troubled Debt Restructuring, Financial effects of modification	$ 272,000	$ 285,000	$ 890,000	$ 1,276,000
Consumer | Residential Mortgage | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	2	2	12
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 134,000	$ 110,000	$ 1,195,000
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 2,000	$ 9,000	$ 17,000
Consumer | Residential Mortgage | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	102	77	282	277
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 11,282,000	$ 7,988,000	$ 30,649,000	$ 29,388,000
New Troubled Debt Restructuring, Financial effects of modification	$ 272,000	$ 220,000	$ 761,000	$ 1,217,000
Consumer | Residential Mortgage | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	20	17	69	40
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 1,656,000	$ 1,105,000	$ 6,328,000	$ 3,788,000
New Troubled Debt Restructuring, Financial effects of modification	$ 2,000	$ 63,000	$ 139,000	$ 42,000
Consumer | Residential Mortgage | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	1	3	22	4
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 64,000	$ 260,000	$ 2,448,000	$ 424,000
New Troubled Debt Restructuring, Financial effects of modification	$ (2,000)	$ 0	$ (19,000)	$ 0
Consumer | RV and Marine FInance
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	32	0	105	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 576,000	$ 0	$ 1,956,000	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ (18,000)	$ 0	$ (44,000)	$ 0
Consumer | RV and Marine FInance | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ 0
Consumer | RV and Marine FInance | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	10	0	34	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 84,000	$ 0	$ 710,000	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ (3,000)	$ 0	$ (19,000)	$ 0
Consumer | RV and Marine FInance | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	22	0	71	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 492,000	$ 0	$ 1,246,000	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ (15,000)	$ 0	$ (25,000)	$ 0
Consumer | RV and Marine FInance | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ 0
Consumer | Other Consumer
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	699	2	707	14
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 3,182,000	$ 22,000	$ 3,560,000	$ 647,000
New Troubled Debt Restructuring, Financial effects of modification	$ (2,000)	$ 0	$ (11,000)	$ (31,000)
Consumer | Other Consumer | Interest rate reduction
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	18	0	19	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 52,000	$ 0	$ 130,000	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ (2,000)	$ 0
Consumer | Other Consumer | Amortization or maturity date change
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	677	1	681	6
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 3,106,000	$ 16,000	$ 3,394,000	$ 575,000
New Troubled Debt Restructuring, Financial effects of modification	$ (1,000)	$ 0	$ (8,000)	$ (24,000)
Consumer | Other Consumer | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	4	1	7	8
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 24,000	$ 6,000	$ 36,000	$ 72,000
New Troubled Debt Restructuring, Financial effects of modification	$ (1,000)	$ 0	$ (1,000)	$ (7,000)
Consumer | Other Consumer | Other
Financing Receivable, Modifications [Line Items]
New Troubled Debt Restructuring, Number of Contracts | contract	0	0	0	0
New Troubled Debt Restructuring, Post-modification Outstanding Ending Balance	$ 0	$ 0	$ 0	$ 0
New Troubled Debt Restructuring, Financial effects of modification	$ 0	$ 0	$ 0	$ 0

XML

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available For Sale Securities Transferred To Held To Maturity Securities	$ 1,000,000		$ 992,760	$ 0
Pledged investment securities to secure public and trust deposits, trading account liabilities, US Treasury demand notes and security repurchase agreements	6,200,000		6,200,000		$ 5,000,000
Unrealized Net Losses Recognized In Oci At Time Of Transfer Of Available For Sale Securities Transferred To Held To Maturity Securities	13,500
Nonmarketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Stock issued by Federal Reserve Banks included in other securities	296,000		296,000		299,000
Federal Home Loan Bank of Cincinnati | Nonmarketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Stock issued by the Federal Home Loan Bank included in other securities	287,000		287,000		$ 249,000
Commercial
Schedule of Available-for-sale Securities [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	$ 3,000	$ 2,000	$ 8,000	$ 7,000

XML

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost	$ 15,611,683	$ 15,776,855
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale and other securities	15,453,061	15,562,837
U.S. Treasury
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	11,256	4,978
Amortized Cost, 1-5 years	0	502
Amortized Cost, 6-10 years	0	0
Amortized Cost, Over 10 years	0	0
Amortized Cost	11,256	5,480
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	11,260	4,988
Fair Value, 1-5 years	0	509
Fair Value, 6-10 years	0	0
Fair Value, Over 10 years	0	0
Available-for-sale and other securities	11,260	5,497
Federal agencies: Mortgage-backed securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	0	0
Amortized Cost, 1-5 years	32,749	46,591
Amortized Cost, 6-10 years	257,032	173,941
Amortized Cost, Over 10 years	10,496,277	10,630,929
Amortized Cost	10,786,058	10,851,461
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	0	0
Fair Value, 1-5 years	32,515	46,762
Fair Value, 6-10 years	255,488	176,404
Fair Value, Over 10 years	10,351,747	10,450,176
Available-for-sale and other securities	10,639,750	10,673,342
Federal agencies, Other agencies
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	4,201	4,302
Amortized Cost, 1-5 years	8,892	5,092
Amortized Cost, 6-10 years	82,692	63,618
Amortized Cost, Over 10 years	0	0
Amortized Cost	95,785	73,012
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	4,223	4,367
Fair Value, 1-5 years	9,034	5,247
Fair Value, 6-10 years	83,194	63,928
Fair Value, Over 10 years	0	0
Available-for-sale and other securities	96,451	73,542
Total U.S. Treasury, Federal agency securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost	10,893,099	10,929,953
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale and other securities	10,747,461	10,752,381
Municipal securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	163,747	169,636
Amortized Cost, 1-5 years	905,872	933,893
Amortized Cost, 6-10 years	1,656,860	1,463,459
Amortized Cost, Over 10 years	703,350	693,440
Amortized Cost	3,429,829	3,260,428
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	160,032	166,887
Fair Value, 1-5 years	905,075	933,903
Fair Value, 6-10 years	1,655,384	1,464,583
Fair Value, Over 10 years	705,618	684,684
Available-for-sale and other securities	3,426,109	3,250,057
Asset-backed securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	0	0
Amortized Cost, 1-5 years	80,003	80,700
Amortized Cost, 6-10 years	162,079	223,352
Amortized Cost, Over 10 years	326,724	520,072
Amortized Cost	568,806	824,124
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	0	0
Fair Value, 1-5 years	80,330	80,560
Fair Value, 6-10 years	163,439	224,565
Fair Value, Over 10 years	311,422	488,356
Available-for-sale and other securities	555,191	793,481
Corporate debt
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	3,143	43,223
Amortized Cost, 1-5 years	66,878	78,430
Amortized Cost, 6-10 years	38,471	32,523
Amortized Cost, Over 10 years	13,211	40,361
Amortized Cost	121,703	194,537
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	3,157	43,603
Fair Value, 1-5 years	68,450	80,196
Fair Value, 6-10 years	39,902	32,865
Fair Value, Over 10 years	14,120	42,019
Available-for-sale and other securities	125,629	198,683
Other securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost, Under 1 year	3,150	1,650
Amortized Cost, 1-5 years	800	2,302
Amortized Cost, 6-10 years	0	0
Amortized Cost, Over 10 years	0	10
Amortized Cost	598,246	567,813
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	3,144	1,650
Fair Value, 1-5 years	791	2,283
Fair Value, 6-10 years	0	0
Fair Value, Over 10 years	0	10
Available-for-sale and other securities	598,671	568,235
Nonmarketable equity securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost	583,019	547,704
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale and other securities	583,019	547,704
Mutual funds
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost	10,416	15,286
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale and other securities	10,416	15,286
Marketable equity securities
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Amortized Cost	861	861
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale and other securities	$ 1,301	$ 1,302

XML

AVAILABLE-FOR-SALE AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 15,611,683	$ 15,776,855
Unrealized Gross Gains	44,395	47,626
Unrealized Gross Losses	(203,017)	(261,644)
Fair Value	15,453,061	15,562,837
U.S. Treasury
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,256	5,480
Unrealized Gross Gains	4	17
Unrealized Gross Losses	0	0
Fair Value	11,260	5,497
Federal agencies: Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,786,058	10,851,461
Unrealized Gross Gains	5,851	12,548
Unrealized Gross Losses	(152,159)	(190,667)
Fair Value	10,639,750	10,673,342
Federal agencies, Other agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	95,785	73,012
Unrealized Gross Gains	722	536
Unrealized Gross Losses	(56)	(6)
Fair Value	96,451	73,542
Total U.S. Treasury, Federal agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,893,099	10,929,953
Unrealized Gross Gains	6,577	13,101
Unrealized Gross Losses	(152,215)	(190,673)
Fair Value	10,747,461	10,752,381
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,429,829	3,260,428
Unrealized Gross Gains	31,043	28,431
Unrealized Gross Losses	(34,763)	(38,802)
Fair Value	3,426,109	3,250,057
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	568,806	824,124
Unrealized Gross Gains	2,409	1,492
Unrealized Gross Losses	(16,024)	(32,135)
Fair Value	555,191	793,481
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	121,703	194,537
Unrealized Gross Gains	3,927	4,161
Unrealized Gross Losses	(1)	(15)
Fair Value	125,629	198,683
Other securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	598,246	567,813
Unrealized Gross Gains	439	441
Unrealized Gross Losses	(14)	(19)
Fair Value	$ 598,671	$ 568,235

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AVAILABLE-FOR-SALE AND OTHER SECURITIES AVAILABLE-FOR-SALE AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value
Less than 12 Months	$ 9,788,317	$ 10,687,088
Over 12 Months	1,404,316	494,614
Total	11,192,633	11,181,702
Unrealized Losses
Less than 12 Months	(151,481)	(221,568)
Over 12 Months	(51,536)	(40,076)
Total	(203,017)	(261,644)
Federal agencies: Mortgage-backed securities
Fair Value
Less than 12 Months	8,283,266	8,908,470
Over 12 Months	1,003,097	41,706
Total	9,286,363	8,950,176
Unrealized Losses
Less than 12 Months	(125,950)	(189,318)
Over 12 Months	(26,209)	(1,349)
Total	(152,159)	(190,667)
Federal agencies, Other agencies
Fair Value
Less than 12 Months	11,607	924
Over 12 Months	0	0
Total	11,607	924
Unrealized Losses
Less than 12 Months	(56)	(6)
Over 12 Months	0	0
Total	(56)	(6)
Total U.S. Treasury, Federal agency securities
Fair Value
Less than 12 Months	8,294,873	8,909,394
Over 12 Months	1,003,097	41,706
Total	9,297,970	8,951,100
Unrealized Losses
Less than 12 Months	(126,006)	(189,324)
Over 12 Months	(26,209)	(1,349)
Total	(152,215)	(190,673)
Municipal securities
Fair Value
Less than 12 Months	1,293,344	1,412,152
Over 12 Months	277,157	272,292
Total	1,570,501	1,684,444
Unrealized Losses
Less than 12 Months	(23,995)	(29,175)
Over 12 Months	(10,768)	(9,627)
Total	(34,763)	(38,802)
Asset-backed securities
Fair Value
Less than 12 Months	199,109	361,185
Over 12 Months	122,568	178,924
Total	321,677	540,109
Unrealized Losses
Less than 12 Months	(1,471)	(3,043)
Over 12 Months	(14,553)	(29,092)
Total	(16,024)	(32,135)
Corporate debt
Fair Value
Less than 12 Months	200	3,567
Over 12 Months	0	200
Total	200	3,767
Unrealized Losses
Less than 12 Months	(1)	(15)
Over 12 Months	0	0
Total	(1)	(15)
Other securities
Fair Value
Less than 12 Months	791	790
Over 12 Months	1,494	1,492
Total	2,285	2,282
Unrealized Losses
Less than 12 Months	(8)	(11)
Over 12 Months	(6)	(8)
Total	$ (14)	$ (19)

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AVAILABLE-FOR-SALE AND OTHER SECURITIES AVAILABLE-FOR-SALE AND OTHER SECURITIES - Gross Realized Gains (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Gross gains on sales of securities	$ 4,201	$ 3,770		$ 8,311	$ 7,161
Gross (losses) on sales of securities	4,130	2,739		4,530	5,398
Net gain on sales of securities	71	1,031		3,781	1,763
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	(104)	0	$ (3,559)	(3,687)	(76)
Gain (Loss) on Sale of Investments	$ (33)	$ 1,031		$ 94	$ 1,687

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AVAILABLE-FOR-SALE AND OTHER SECURITIES - Collateralized Debt Obligation (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Unrealized Gross Losses	$ (203,017)	$ (261,644)
Pooled Trust Preferred
Schedule of Available-for-sale Securities [Line Items]
Par Value	61,009	137,197
Amortized Cost	35,397	101,210
Fair Value	24,127	76,003
Unrealized Gross Losses	(11,270)	$ (25,207)
Pooled Trust Preferred | MM Comm III
Schedule of Available-for-sale Securities [Line Items]
Par Value	4,509
Amortized Cost	4,308
Fair Value	3,641
Unrealized Gross Losses	$ (667)
Actual Deferrals and Defaults as Percent of Original Collateral	5.00%
Expected Defaults as Percent of Remaining Performing Collateral	7.00%
Excess Subordination	34.00%
Pooled Trust Preferred | Reg Diversified
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 25,500
Amortized Cost	100
Fair Value	510
Unrealized Gross Losses	$ (410)
Actual Deferrals and Defaults as Percent of Original Collateral	0.00%
Expected Defaults as Percent of Remaining Performing Collateral	0.00%
Excess Subordination	0.00%
Pooled Trust Preferred | Tropic III
Schedule of Available-for-sale Securities [Line Items]
Par Value	$ 31,000
Amortized Cost	30,989
Fair Value	19,976
Unrealized Gross Losses	$ (11,013)
Actual Deferrals and Defaults as Percent of Original Collateral	16.00%
Expected Defaults as Percent of Remaining Performing Collateral	6.00%
Excess Subordination	41.00%

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AVAILABLE-FOR-SALE AND OTHER SECURITIES AVAILABLE-FOR-SALE AND OTHER SECURITIES - Security Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Impairment losses recognized in earnings on available-for-sale securities	$ 104	$ 0	$ 3,559	$ 3,687	$ 76
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of year	10,821	9,831	11,796	11,796	18,368
Reductions from sales	(5,373)	(76)		(9,931)	(8,689)
Additional credit losses	104	0		3,687	76
Balance, end of year	5,552	9,755	$ 10,821	5,552	9,755
Collateralized Debt Obligations [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Impairment losses recognized in earnings on available-for-sale securities	0	0		3,559	0
Fixed Income Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Impairment losses recognized in earnings on available-for-sale securities	$ 104	$ 0		$ 128	$ 76

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HELD-TO-MATURITY SECURITIES - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Held-to-maturity Securities [Abstract]
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities		$ 0
Available For Sale Securities Transferred To Held To Maturity Securities	$ 1,000,000,000	$ 992,760,000	$ 0
Unrealized Net Losses Recognized In Oci At Time Of Transfer Of Available For Sale Securities Transferred To Held To Maturity Securities	$ 13,500,000

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HELD-TO-MATURITY SECURITIES - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Over 12 Months	$ 307,053	$ 186,226
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Amortized Cost	8,688,399	7,806,939
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value	8,655,805	7,787,268
Federal agencies: Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Over 12 Months	301,637	186,226
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Held-to-maturity Securities, Under 1 year	0	0
Held-to-maturity Securities, 1-5 years	0	0
Held-to-maturity Securities, 6-10 years	68,668	41,261
Held-to-maturity Securities, Over 10 years	8,067,957	7,157,083
Amortized Cost	8,136,625	7,198,344
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	0	0
Fair Value, 1-5 years	0	0
Fair Value, 6-10 years	68,478	40,791
Fair Value, Over 10 years	8,035,777	7,139,943
Fair Value	8,104,255	7,180,734
Federal agencies, Other agencies
Schedule of Held-to-maturity Securities [Line Items]
Over 12 Months	0	0
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Held-to-maturity Securities, Under 1 year	0	0
Held-to-maturity Securities, 1-5 years	0	0
Held-to-maturity Securities, 6-10 years	375,580	398,341
Held-to-maturity Securities, Over 10 years	170,628	204,083
Amortized Cost	546,208	602,424
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	0	0
Fair Value, 1-5 years	0	0
Fair Value, 6-10 years	376,393	399,452
Fair Value, Over 10 years	169,741	201,180
Fair Value	546,134	600,632
Total U.S. Treasury, Federal agency securities
Schedule of Held-to-maturity Securities [Line Items]
Over 12 Months	301,637	186,226
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Amortized Cost	8,682,833	7,800,768
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value	8,650,389	7,781,366
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Over 12 Months	5,416	0
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Held-to-maturity Securities, Under 1 year	0	0
Held-to-maturity Securities, 1-5 years	0	0
Held-to-maturity Securities, 6-10 years	0	0
Held-to-maturity Securities, Over 10 years	5,566	6,171
Amortized Cost	5,566	6,171
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value, Under 1 year	0	0
Fair Value, 1-5 years	0	0
Fair Value, 6-10 years	0	0
Fair Value, Over 10 years	5,416	5,902
Fair Value	$ 5,416	$ 5,902

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HELD-TO-MATURITY SECURITIES - Amortized Cost, Gross Unrealized Gains and Losses, & Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 6,285,058	$ 3,460,695
Amortized Cost	8,688,399	7,806,939
Unrealized Gross Gains	16,565	22,573
Unrealized Gross Losses	(49,159)	(42,244)
Fair Value	8,655,805	7,787,268
Federal agencies: Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	6,031,533	3,041,586
Amortized Cost	8,136,625	7,198,344
Unrealized Gross Gains	14,868	20,883
Unrealized Gross Losses	(47,238)	(38,493)
Fair Value	8,104,255	7,180,734
Federal agencies, Other agencies
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	248,109	413,207
Amortized Cost	546,208	602,424
Unrealized Gross Gains	1,697	1,690
Unrealized Gross Losses	(1,771)	(3,482)
Fair Value	546,134	600,632
Total U.S. Treasury, Federal agency securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	6,279,642	3,454,793
Amortized Cost	8,682,833	7,800,768
Unrealized Gross Gains	16,565	22,573
Unrealized Gross Losses	(49,009)	(41,975)
Fair Value	8,650,389	7,781,366
Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	5,416	5,902
Amortized Cost	5,566	6,171
Unrealized Gross Gains	0	0
Unrealized Gross Losses	(150)	(269)
Fair Value	$ 5,416	$ 5,902

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HELD-TO-MATURITY SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value
Less than 12 Months	$ 5,978,005	$ 3,274,469
Over 12 Months	307,053	186,226
Total	6,285,058	3,460,695
Unrealized Losses
Less than 12 Months	(39,975)	(35,221)
Over 12 Months	(9,184)	(7,023)
Total	(49,159)	(42,244)
Federal agencies: Mortgage-backed securities
Fair Value
Less than 12 Months	5,729,896	2,855,360
Over 12 Months	301,637	186,226
Total	6,031,533	3,041,586
Unrealized Losses
Less than 12 Months	(38,204)	(31,470)
Over 12 Months	(9,034)	(7,023)
Total	(47,238)	(38,493)
Federal agencies, Other agencies
Fair Value
Less than 12 Months	248,109	413,207
Over 12 Months	0	0
Total	248,109	413,207
Unrealized Losses
Less than 12 Months	(1,771)	(3,482)
Over 12 Months	0	0
Total	(1,771)	(3,482)
Total U.S. Treasury, Federal agency securities
Fair Value
Less than 12 Months	5,978,005	3,268,567
Over 12 Months	301,637	186,226
Total	6,279,642	3,454,793
Unrealized Losses
Less than 12 Months	(39,975)	(34,952)
Over 12 Months	(9,034)	(7,023)
Total	(49,009)	(41,975)
Municipal securities
Fair Value
Less than 12 Months	0	5,902
Over 12 Months	5,416	0
Total	5,416	5,902
Unrealized Losses
Less than 12 Months	0	(269)
Over 12 Months	(150)	0
Total	$ (150)	$ (269)

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LOAN SALES AND SECURITIZATIONS - 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
Residential Mortgage
Servicing Assets at Fair Value [Line Items]
Servicing income	$ 14	$ 13	$ 42	$ 36
Unpaid principal balance of third party serviced loans	19,300		19,300		$ 18,900
Automobile
Servicing Assets at Fair Value [Line Items]
Servicing income	4	2	14	6
Unpaid principal balance of third party serviced loans	1,200		1,200		1,700
Small Business Association (SBA) Loan
Servicing Assets at Fair Value [Line Items]
Servicing income	3	$ 2	8	$ 7
Unpaid principal balance of third party serviced loans	$ 1,300		$ 1,300		$ 1,100

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio (Details) - Residential Mortgage - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Servicing Asset at Amortized Cost [Line Items]
Loans sold with servicing retained	$ 1,178,955	$ 1,204,547	$ 2,824,707	$ 2,552,602
Pretax gains resulting from above loan sales	$ 26,880	$ 32,073	$ 66,014	$ 64,804

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Fair Value Method (Details) - Residential Mortgage - USD ($) $ in Thousands	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]
Fair value, beginning of period	$ 12,528	$ 13,105	$ 13,747	$ 17,585
Time decay	(202)	(217)	(649)	(734)
Payoffs	(295)	(423)	(876)	(1,392)
Changes in valuation inputs or assumptions	(278)	(37)	(469)	(3,031)
Fair value, end of period:	$ 11,753	$ 12,428	$ 11,753	$ 12,428
Fair value method
Servicing Asset at Fair Value, Amount [Roll Forward]
Weighted-average life (years)	5 years 6 months	5 years 1 month	5 years 6 months	5 years 1 month

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Fair value, end of period	$ 229,746		$ 229,746		$ 225,578
Residential Mortgage
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Carrying value, beginning of period	176,491	$ 121,292	172,466	$ 143,133
New servicing assets created	12,841	12,434	30,694	25,820
Servicing Asset at Amortized Cost, Other Changes that Affect Balance, Amount	0	15,317	0	15,317
Impairment (charge) / recovery	(688)	(2,543)	(318)	(21,093)
Amortization and other	(6,995)	(7,194)	(19,817)	(18,785)
Carrying value, end of period	183,025	144,392	183,025	144,392
Fair value, end of period	$ 183,583	$ 144,623	$ 183,583	$ 144,623
Residential Mortgage | Amortization method
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Weighted-average life (years)	6 years 12 months	6 years 1 month	6 years 12 months	6 years 1 month

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LOAN SALES AND SECURITIZATIONS LOAN SALES AND SECURTIZIATIONS - Residential Mortgage Portfolio, MSRs Fair Value Method Key Assumptions (Details) - Fair value method - Residential Mortgage - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Assets at Fair Value [Line Items]
Constant prepayment rate (annualized), actual	12.10%	10.90%
Constant prepayment rate (annualized), 10% adverse change	$ (472)		$ (501)
Constant prepayment rate (annualized), 20% adverse change	$ (910)		(970)
Spread over forward interest rate swap rates, actual	8.13%	5.36%
Spread over forward interest rate swap rates, 10% adverse change	$ (436)		(454)
Spread over forward interest rate swap rates, 20% adverse change	$ (823)		$ (879)

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method Key Assumptions (Details) - Amortization method - Residential Mortgage - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]
Constant prepayment rate (annualized), actual	8.40%	7.80%
Constant prepayment rate (annualized), 10% adverse change	$ (5,172)		$ (4,510)
Constant prepayment rate (annualized), 20% adverse change	$ (10,038)		(8,763)
Spread over forward interest rate swap rates, actual	10.41%	11.73%
Spread over forward interest rate swap rates, 10% adverse change	$ (6,866)		(5,259)
Spread over forward interest rate swap rates, 20% adverse change	$ (12,934)		$ (10,195)

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LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortization Method (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Fair value, end of period	$ 229,746		$ 229,746		$ 225,578
Automobile
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Carrying value, beginning of period	12,524	$ 5,458	18,285	$ 8,771
Amortization and other	(2,338)	(1,087)	(8,099)	(4,400)
Fair value, end of period	10,398	4,366	10,398	4,366
Carrying value, end of period	$ 10,186	$ 4,371	$ 10,186	$ 4,371
Automobile | Amortization method
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Weighted-average life (years)	3 years 8 months	3 years 2 months	3 years 8 months	3 years 2 months

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LOAN SALES AND SECURITIZATIONS - Automobile Loans, MSRs Amortizations Method Key Assumptions (Details) - Amortization method - Automobile - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]
Constant prepayment rate (annualized), actual	23.66%	19.98%
Constant prepayment rate (annualized), 10% adverse change	$ (586)		$ (1,047)
Constant prepayment rate (annualized), 20% adverse change	$ (1,112)		(2,026)
Spread over forward interest rate swap rates, actual	5.00%	5.00%
Spread over forward interest rate swap rates, 10% adverse change	$ (14)		(26)
Spread over forward interest rate swap rates, 20% adverse change	$ (27)		$ (53)

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LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio (Details) - Small Business Association (SBA) Loan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Transfer of Financial Assets Accounted for as Sales [Line Items]
Loans with servicing retained sold	$ 107,259	$ 62,803	$ 272,635	$ 167,321
Pretax gains resulting from above loan sales	$ 8,508	$ 4,679	$ 21,435	$ 12,862

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LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio, MSRs Amortization Method (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Fair value, end of period	$ 229,746		$ 229,746		$ 225,578
Small Business Association (SBA) Loan
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Carrying value, beginning of period	23,113	$ 19,612	21,080	$ 19,747
New servicing assets created	3,591	1,879	9,187	5,259
Amortization and other	(1,923)	(1,745)	(5,486)	(5,260)
Carrying value, end of period	24,781	19,746	24,781	19,746
Fair value, end of period	$ 28,822	$ 24,065	$ 28,822	$ 24,065
Weighted-average life (years)	3 years 4 months	3 years 4 months	3 years 3 months 18 days	3 years 4 months

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LOAN SALES AND SECURITIZATIONS - Small Business Association Portfolio, MSRs Amortization Method Key Assumptions (Details) - Small Business Association (SBA) Loan - Amortization method - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]
Constant prepayment rate (annualized), actual	7.50%	7.40%
Constant prepayment rate (annualized), 10% adverse change	$ (385)		$ (324)
Constant prepayment rate (annualized), 20% adverse change	$ (764)		(644)
Spread over forward interest rate swap rates, actual	15.00%	15.00%
Spread over forward interest rate swap rates, 10% adverse change	$ (774)		(1,270)
Spread over forward interest rate swap rates, 20% adverse change	$ (1,516)		$ (1,870)

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LONG-TERM DEBT (Details) - Senior Notes - USD ($)	3 Months Ended
	Sep. 30, 2017	Aug. 07, 2017	Mar. 07, 2017
Huntington National Bank Senior Note Due March 2020, 2.97 Percent [Member]
Debt Instrument [Line Items]
Debt face amount			$ 700,000,000.0
Debt percent of value			99.994%
Debt stated interest rate			2.375%
Debt Instrument, Redemption Price, Percentage	100.00%
Huntington National Bank Senior Floating Rate Notes Due March 2020 [Member]
Debt Instrument [Line Items]
Debt face amount			$ 300,000,000.0
Debt percent of value			100.00%
Debt Instrument, Description of Variable Rate Basis	three month LIBOR
Debt Instrument, Basis Spread on Variable Rate	51.00%
Huntington National Bank Senior Note Due August 2022, 2.5 Percent [Member]
Debt Instrument [Line Items]
Debt face amount		$ 700,000,000.0
Debt percent of value		99.762%
Debt stated interest rate		2.50%

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OTHER COMPREHENSIVE INCOME - Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pretax
Other comprehensive income (loss), pretax	$ (30,077)	$ (58,136)	$ 47,637	$ 85,332
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	10,471	20,003	(16,584)	(31,349)
After-tax
Other comprehensive income (loss), net of tax	(19,606)	(38,133)	31,053	53,983
Accumulated OTTI
Pretax
Other comprehensive income (loss), pretax	410	2,002	3,698	(600)
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	(145)	(708)	(1,307)	212
After-tax
Other comprehensive income (loss), net of tax	265	1,294	2,391	(388)
Unrealized gains and (losses) on debt securities | Debt Securities
Pretax
Other comprehensive income (loss), before reclassifications, before tax	(42,429)	(54,109)	19,853	76,637
Reclassification adjustment, before tax	8,715	726	18,577	(2,032)
Tax (Expense) Benefit
Other comprehensive income (loss) before reclassifications, tax	14,828	18,604	(6,779)	(28,315)
Reclassification adjustment, tax	(3,082)	(257)	(6,570)	718
After-tax
Other comprehensive income (loss), before reclassifications, net of tax	(27,601)	(35,505)	13,074	48,322
Reclassification adjustment, net of tax	5,633	469	12,007	(1,314)
Other comprehensive income (loss), net of tax	(21,703)	(33,742)	27,472	46,620
Unrealized gains and (losses) on debt securities | Marketable equity securities
Pretax
Other comprehensive income (loss), pretax				170
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit				(60)
After-tax
Other comprehensive income (loss), net of tax				110
Unrealized gains and (losses) on debt securities and Accumulated OTTI | Debt Securities
Pretax
Other comprehensive income (loss), pretax	(33,304)	(51,381)	42,128	74,005
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	11,601	17,639	(14,656)	(27,385)
Unrealized gains and (losses) on cash flow hedging derivatives
Pretax
Other comprehensive income (loss), before reclassifications, before tax	1,885	(8,171)	1,274	8,047
Reclassification adjustment, before tax	144	123	1,131	(769)
Other comprehensive income (loss), pretax	2,029	(8,048)	2,405	7,278
Tax (Expense) Benefit
Other comprehensive income (loss) before reclassifications, tax	(660)	2,860	(446)	(2,816)
Reclassification adjustment, tax	(51)	(44)	(396)	269
Total other comprehensive income (loss), tax (expense) benefit	(711)	2,816	(842)	(2,547)
After-tax
Other comprehensive income (loss), before reclassifications, net of tax	1,225	(5,311)	828	5,231
Reclassification adjustment, net of tax	93	79	735	(500)
Other comprehensive income (loss), net of tax	1,318	(5,232)	1,563	4,731
Unrealized gains (losses) for pension and other post- retirement obligations
Pretax
Other comprehensive income (loss), pretax	1,198	1,293	3,104	3,879
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	(419)	(452)	(1,086)	(1,357)
After-tax
Other comprehensive income (loss), net of tax	$ 779	$ 841	$ 2,018	$ 2,522

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OTHER COMPREHENSIVE INCOME OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		$ 10,308,146	$ 6,594,606
Other comprehensive income before reclassifications		16,293	53,275
Amounts reclassified from accumulated OCI to earnings		14,760	708
Period change			53,983
Balance, end of period	$ 10,698,849	10,698,849	10,386,765
Unrealized gains and (losses) on debt securities | Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		(192,764)	8,361
Other comprehensive income before reclassifications		15,465	47,934
Amounts reclassified from accumulated OCI to earnings		12,007	(1,314)
Period change	27,472		46,620
Balance, end of period	(165,292)	(165,292)	54,981
Unrealized gains and (losses) on debt securities | Marketable equity securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		287	176
Other comprehensive income before reclassifications		0	110
Amounts reclassified from accumulated OCI to earnings		0	0
Period change	0		110
Balance, end of period	287	287	286
Unrealized gains and (losses) on cash flow hedging derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		(2,634)	(3,948)
Other comprehensive income before reclassifications		828	5,231
Amounts reclassified from accumulated OCI to earnings		735	(500)
Period change	1,563		4,731
Balance, end of period	(1,071)	(1,071)	783
Unrealized gains (losses) for pension and other post- retirement obligations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		(205,905)	(230,747)
Other comprehensive income before reclassifications		0	0
Amounts reclassified from accumulated OCI to earnings		2,018	2,522
Period change	2,018		2,522
Balance, end of period	(203,887)	(203,887)	(228,225)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period		(401,016)	(226,158)
Period change	31,053
Balance, end of period	$ (369,963)	(369,963)	(172,175)
Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net unrealized loss on securities transfer		$ (97,000)	$ (82,000)

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OTHER COMPREHENSIVE INCOME - Reclassifications (Details) - USD ($) $ in Thousands	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 - held-to-maturity securities - taxable	$ 48,743	$ 33,098	$ 138,214	$ 105,307
Noninterest income - net gains (losses) on sale of securities	71	1,031	3,781	1,763
Interest income - loans and leases	724,284	583,653	2,100,056	1,516,849
Noninterest income - other income	38,157	33,399	123,110	99,720
Noninterest expense - personnel costs	(377,088)	(405,024)	(1,151,085)	(989,369)
Income before income taxes	364,512	151,753	982,278	606,847
Provision for income taxes	(89,944)	(24,749)	(227,875)	(133,989)
Net income applicable to common shares	255,665	108,467	697,733	426,449
Unrealized gains and (losses) on debt securities | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest income - held-to-maturity securities - taxable	(1,498)	(726)	(7,388)	478
Noninterest income - net gains (losses) on sale of securities	(7,113)	0	(7,502)	1,630
Accumulated OTTI | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Noninterest income - net gains (losses) on sale of securities	(104)	0	(3,687)	(76)
Unrealized gains and (losses) on debt securities and Accumulated OTTI | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(8,715)	(726)	(18,577)	2,032
Provision for income taxes	3,082	257	6,570	(718)
Net income applicable to common shares	(5,633)	(469)	(12,007)	1,314
Unrealized gains and (losses) on cash flow hedging derivatives | Interest Rate Contract | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest income - loans and leases	(144)	(123)	(1,131)	770
Noninterest income - other income	0	0	0	(1)
Income before income taxes	(144)	(123)	(1,131)	769
Provision for income taxes	51	44	396	(269)
Net income applicable to common shares	(93)	(79)	(735)	500
Amortization of defined benefit pension and post-retirement items: actuarial gains (losses) | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Noninterest expense - personnel costs	(1,690)	(1,785)	(4,580)	(5,355)
Amortization of defined benefit pension and post-retirement items: Prior service credit | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Noninterest expense - personnel costs	492	492	1,476	1,476
Unrealized gains (losses) for pension and other post- retirement obligations | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(1,198)	(1,293)	(3,104)	(3,879)
Provision for income taxes	419	452	1,086	1,357
Net income applicable to common shares	$ (779)	$ (841)	$ (2,018)	$ (2,522)

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic earnings per common share:
Net income	$ 274,568	$ 127,004	$ 754,403	$ 472,858
Preferred stock dividends	(18,903)	(18,537)	(56,670)	(46,409)
Net income available to common shareholders	255,665	108,467	697,733	426,449
Effect of assumed preferred stock conversion	0	0	0	0
Net income applicable to diluted earnings per share	$ 255,665	$ 108,467	$ 697,733	$ 426,449
Average common shares issued and outstanding (in shares)	1,086,038	938,578	1,087,115	844,167
Basic earnings per common share (in usd per share)	$ 0.24	$ 0.12	$ 0.64	$ 0.51
Dilutive potential common shares:
Stock options and restricted stock units and awards	17,079	10,714	17,515	10,295
Shares held in deferred compensation plans	3,228	2,654	3,096	2,337
Other	146	135	152	135
Dilutive potential common shares	20,453	13,503	20,763	12,767
Total diluted average common shares issued and outstanding (in shares)	1,106,491	952,081	1,107,878	856,934
Diluted earnings per common share (in usd per share)	$ 0.23	$ 0.11	$ 0.63	$ 0.50
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options outstanding to purchase common stock shares having antidilutive effect	1,500	3,500	900	3,300

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BENEFIT PLANS - Narrative (Details)	9 Months Ended
	Sep. 30, 2017 year
Defined Contribution Plan [Abstract]
Match - Base pay contributed to the plan	matches participant contributions, up to the first 4%
Base Pay Contributed To Plan Profit Sharing	profit-sharing contribution equal to 1% of eligible participants’ 2016
Post Retirement Benefits
Benefit Plans (Textuals) [Abstract]
Employees retirement age for health care and life insurance benefits under unfunded defined benefit post-retirement plan	55
Deferred Compensation Arrangement With Individual Requisite Service Period	10 years

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BENEFIT PLANS - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Benefits
Components of net periodic benefit expense [Abstract]
Service cost	$ 640	$ 1,425	$ 1,920	$ 3,475
Interest cost	7,478	7,978	22,433	21,474
Expected return on plan assets	(13,803)	(12,086)	(41,409)	(32,533)
Amortization of prior service cost	0	0	0	0
Amortization of gain (loss)	1,747	1,865	5,241	5,594
Settlements	5,049	3,400	10,049	10,200
Net periodic (benefit) cost	1,111	2,582	(1,766)	8,210
Post Retirement Benefits
Components of net periodic benefit expense [Abstract]
Service cost	22	16	65	16
Interest cost	98	79	296	188
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	(492)	(492)	(1,476)	(1,476)
Amortization of gain (loss)	(55)	(72)	(164)	(216)
Settlements	0	0	0	0
Net periodic (benefit) cost	$ (427)	$ (469)	$ (1,279)	$ (1,488)

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BENEFIT PLANS - Costs of Retirement Plans (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]
Defined Contribution Plan, Cost	$ 5	$ 9	$ 26	$ 26

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FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 584,829	$ 438,224
Loans Receivable, Fair Value Disclosure	$ 99,191	$ 82,319

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FAIR VALUES OF ASSETS AND LIABILITIES - Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets measured at fair value on a recurring basis
Loans Held-for-sale, Fair Value Disclosure	$ 584,829	$ 438,224
Consumer loans	99,191	82,319
Trading account securities	88,488	133,295
Available-for-sale and other securities	15,453,061	15,562,837
Gross amounts of recognized assets	320,826	420,159
Derivative assets netting	(154,562)	(181,940)
Net amounts of assets presented in the condensed consolidated balance sheets	166,264	238,219
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	293,650	370,647
Gross amounts offset in the condensed consolidated balance sheets	(234,526)	(272,361)
Derivative liabilities	59,124	98,286
U.S. Treasury
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	11,260	5,497
Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	10,639,750	10,673,342
Federal agencies, Other agencies
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	96,451	73,542
Municipal securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	3,426,109	3,250,057
Asset-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	555,191	793,481
Corporate debt
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	125,629	198,683
Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Loans Held-for-sale, Fair Value Disclosure	584,829	438,224
Trading account securities	88,488	133,295
Available-for-sale and other securities	14,870,042	15,015,133
MSRs	11,753	13,747
Derivative assets netting	(154,562)	(181,940)
Net amounts of assets presented in the condensed consolidated balance sheets	166,264	238,219
Liabilities measured at fair value on a recurring basis
Gross amounts offset in the condensed consolidated balance sheets	(234,526)	(272,361)
Derivative liabilities	59,124	98,286
Short-term borrowings	4	474
Fair Value, Measurements, Recurring | U.S. Treasury
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	11,260	5,497
Fair Value, Measurements, Recurring | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	10,639,750	10,673,342
Fair Value, Measurements, Recurring | Federal agencies, Other agencies
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	96,451	73,542
Fair Value, Measurements, Recurring | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	1,481	1,148
Available-for-sale and other securities	3,426,109	3,250,057
Fair Value, Measurements, Recurring | Asset-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	555,191	793,481
Fair Value, Measurements, Recurring | Corporate debt
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	125,629	198,683
Fair Value, Measurements, Recurring | Other Debt Obligations [Member]
Assets measured at fair value on a recurring basis
Trading account securities	86,982	132,147
Available-for-sale and other securities	15,652	20,531
Fair Value, Measurements, Recurring | Level 1
Assets measured at fair value on a recurring basis
Loans Held-for-sale, Fair Value Disclosure	0	0
Consumer loans	0	0
Trading account securities	87,007	132,147
Available-for-sale and other securities	22,977	22,085
MSRs	0	0
Gross amounts of recognized assets	0	0
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	0	0
Short-term borrowings	4	474
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury
Assets measured at fair value on a recurring basis
Trading account securities	25
Available-for-sale and other securities	11,260	5,497
Fair Value, Measurements, Recurring | Level 1 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 1 | Federal agencies, Other agencies
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 1 | Other Debt Obligations [Member]
Assets measured at fair value on a recurring basis
Trading account securities	86,982	132,147
Available-for-sale and other securities	11,717	16,588
Fair Value, Measurements, Recurring | Level 2
Assets measured at fair value on a recurring basis
Loans Held-for-sale, Fair Value Disclosure	584,829	438,224
Consumer loans	58,708	34,439
Trading account securities	1,481	1,148
Available-for-sale and other securities	11,864,911	12,119,001
MSRs	0	0
Gross amounts of recognized assets	312,401	414,412
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	288,191	362,777
Short-term borrowings	0	0
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury
Assets measured at fair value on a recurring basis
Trading account securities	0
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 2 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	10,639,750	10,673,342
Fair Value, Measurements, Recurring | Level 2 | Federal agencies, Other agencies
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	96,451	73,542
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	1,481	1,148
Available-for-sale and other securities	468,082	452,013
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	531,064	717,478
Fair Value, Measurements, Recurring | Level 2 | Corporate debt
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	125,629	198,683
Fair Value, Measurements, Recurring | Level 2 | Other Debt Obligations [Member]
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Available-for-sale and other securities	3,935	3,943
Fair Value, Measurements, Recurring | Level 3
Assets measured at fair value on a recurring basis
Loans Held-for-sale, Fair Value Disclosure	0	0
Consumer loans	40,483	47,880
Trading account securities	0	0
Available-for-sale and other securities	2,982,154	2,874,047
MSRs	11,753	13,747
Gross amounts of recognized assets	8,425	5,747
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	5,459	7,870
Short-term borrowings	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury
Assets measured at fair value on a recurring basis
Trading account securities	0
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 3 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 3 | Federal agencies, Other agencies
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Available-for-sale and other securities	2,958,027	2,798,044
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	24,127	76,003
Fair Value, Measurements, Recurring | Level 3 | Corporate debt
Assets measured at fair value on a recurring basis
Available-for-sale and other securities	0	0
Fair Value, Measurements, Recurring | Level 3 | Other Debt Obligations [Member]
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Available-for-sale and other securities	$ 0	$ 0

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FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Derivative Instruments Level 3 Roll Forward:
Opening balance			$ (2,123)	$ 6,056
Transfers out of Level 3 (1)			(3,833)	(5,115)
Total gains/losses for the period:
Included in earnings			8,922	7,659
Included in OCI			0	0
Purchases/originations			0	0
Sales			0	0
Settlements			0	0
Closing balance	$ 2,966	$ 8,600	2,966	8,600
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date			8,922	7,759
MSRs
Assets Level 3 Roll Forward:
Opening balance	12,528	13,105	13,747	17,585
Transfers out of Level 3 (1)			0	0
Total gains/losses for the period:
Included in earnings	(775)	(677)	(1,994)	(5,157)
Included in OCI	0	0	0	0
Purchases/originations	0	0	0	0
Sales	0	0	0	0
Repayments	0	0	0	0
Settlements	0	0	0	0
Closing balance	11,753	12,428	11,753	12,428
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	(775)	(677)	(1,994)	(5,157)
Net Derivative Instruments Level 3 Roll Forward:
Transfers out of Level 3 (1)	0	0
Derivative [Member]
Assets Level 3 Roll Forward:
Opening balance	3,178	12,751
Total gains/losses for the period:
Included in earnings	1,164	(2,459)
Included in OCI	0	0
Purchases/originations	0	0
Sales	0	0
Repayments	0	0	0	0
Settlements	0	0
Closing balance	2,966	8,600	2,966	8,600
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	1,164	(2,459)
Net Derivative Instruments Level 3 Roll Forward:
Transfers out of Level 3 (1)	1,376	1,692
Municipal securities
Assets Level 3 Roll Forward:
Opening balance	2,872,007	2,237,975	2,798,044	2,095,551
Transfers out of Level 3 (1)			0	0
Total gains/losses for the period:
Included in earnings	(637)	4,166	(3,612)	4,166
Included in OCI	(33,781)	(28,272)	(887)	(8,946)
Purchases/originations	166,514	953,639	414,123	1,237,546
Sales	(90)		(90)	(36,657)
Repayments	0	0	0	0
Settlements	(45,986)	(262,235)	(249,551)	(386,387)
Closing balance	2,958,027	2,905,273	2,958,027	2,905,273
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	(104)	0	(128)	0
Net Derivative Instruments Level 3 Roll Forward:
Transfers out of Level 3 (1)	0	0
Asset-backed securities
Assets Level 3 Roll Forward:
Opening balance	42,575	71,379	76,003	100,337
Transfers out of Level 3 (1)			0	0
Total gains/losses for the period:
Included in earnings	(1,569)	0	(5,097)	2
Included in OCI	5,166	2,875	13,936	3,549
Purchases/originations	0	10	0	10
Sales	(21,625)	0	(59,353)	(27,794)
Repayments	0	0	0	0
Settlements	(420)	(445)	(1,362)	(2,285)
Closing balance	24,127	73,819	24,127	73,819
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	0	0	(3,559)	2
Net Derivative Instruments Level 3 Roll Forward:
Transfers out of Level 3 (1)	0	0
Automobile
Assets Level 3 Roll Forward:
Opening balance	43,855	925	47,880	1,748
Transfers out of Level 3 (1)			0	0
Total gains/losses for the period:
Included in earnings	187	(249)	1,617	(249)
Included in OCI	0	0	0	0
Purchases/originations	0	56,469	0	56,469
Sales	0	0	0	0
Repayments	(3,559)	(3,860)	(9,014)	(4,683)
Settlements	0	0	0	0
Closing balance	40,483	53,285	40,483	53,285
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	0	0	0	0
Net Derivative Instruments Level 3 Roll Forward:
Transfers out of Level 3 (1)	$ 0	$ 0
Mortgage banking income
Total gains/losses for the period:
Included in earnings			8,922	7,659
Mortgage banking income | MSRs
Total gains/losses for the period:
Included in earnings			(1,994)	(5,157)
Mortgage banking income | Municipal securities
Total gains/losses for the period:
Included in earnings			0	0
Mortgage banking income | Asset-backed securities
Total gains/losses for the period:
Included in earnings			0	0
Mortgage banking income | Automobile
Total gains/losses for the period:
Included in earnings			0	0
Securities gains (losses)
Total gains/losses for the period:
Included in earnings			0	0
Securities gains (losses) | MSRs
Total gains/losses for the period:
Included in earnings			0	0
Securities gains (losses) | Municipal securities
Total gains/losses for the period:
Included in earnings			(128)	0
Securities gains (losses) | Asset-backed securities
Total gains/losses for the period:
Included in earnings			(5,100)	0
Securities gains (losses) | Automobile
Total gains/losses for the period:
Included in earnings			0	0
Interest and fee income
Total gains/losses for the period:
Included in earnings			0	0
Interest and fee income | MSRs
Total gains/losses for the period:
Included in earnings			0	0
Interest and fee income | Municipal securities
Total gains/losses for the period:
Included in earnings			(3,484)	0
Interest and fee income | Asset-backed securities
Total gains/losses for the period:
Included in earnings			3	0
Interest and fee income | Automobile
Total gains/losses for the period:
Included in earnings			0	0
Noninterest Income [Member]
Total gains/losses for the period:
Included in earnings			0	0
Noninterest Income [Member] | MSRs
Total gains/losses for the period:
Included in earnings			0	0
Noninterest Income [Member] | Municipal securities
Total gains/losses for the period:
Included in earnings			0	4,166
Noninterest Income [Member] | Asset-backed securities
Total gains/losses for the period:
Included in earnings			0	2
Noninterest Income [Member] | Automobile
Total gains/losses for the period:
Included in earnings			$ 1,617	$ (249)

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Classification of Gains/Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative asset (liability), gain (loss) included in earnings			$ 8,922	$ 7,659
Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative asset (liability), gain (loss) included in earnings			8,922	7,659
Securities gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative asset (liability), gain (loss) included in earnings			0	0
Interest and fee income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative asset (liability), gain (loss) included in earnings			0	0
Noninterest income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative asset (liability), gain (loss) included in earnings			0	0
MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	$ (775)	$ (677)	(1,994)	(5,157)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(775)	677
Mortgage banking income	775	677
Securities gains (losses)	0	0
Interest and fee income	0	0
Noninterest income	0	0
MSRs | Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			(1,994)	(5,157)
MSRs | Securities gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
MSRs | Interest and fee income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
MSRs | Noninterest income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Derivative Financial Instruments, Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(1,164)	2,459
Mortgage banking income	(1,164)	2,459
Securities gains (losses)	0	0
Interest and fee income	0	0
Noninterest income	0	0
Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(637)	4,166	(3,612)	4,166
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	637	(4,166)
Mortgage banking income	0	0
Securities gains (losses)	(104)	0
Interest and fee income	(533)	0
Noninterest income	0	4,166
Municipal securities | Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Municipal securities | Securities gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			(128)	0
Municipal securities | Interest and fee income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			(3,484)	0
Municipal securities | Noninterest income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	4,166
Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(1,569)	0	(5,097)	2
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	1,569	0
Mortgage banking income	0	0
Securities gains (losses)	(1,569)	0
Interest and fee income	0	0
Noninterest income	0	0
Asset-backed securities | Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Asset-backed securities | Securities gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			(5,100)	0
Asset-backed securities | Interest and fee income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			3	0
Asset-backed securities | Noninterest income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	2
Automobile
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	187	(249)	1,617	(249)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(187)	249
Mortgage banking income	0	0
Securities gains (losses)	0	0
Interest and fee income	0	0
Noninterest income	$ 187	$ (249)
Automobile | Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Automobile | Securities gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Automobile | Interest and fee income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			0	0
Automobile | Noninterest income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			$ 1,617	$ (249)

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 584,829	$ 438,224
Loans Receivable, Fair Value Disclosure	99,191	82,319
Fair Value, Measurements, Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	584,829	438,224
Fair Value, Measurements, Recurring | Mortgages Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	584,829	438,224
Loans Held For Sale Unpaid Principal	564,106	433,760
Difference	(20,723)	(4,464)
Fair Value, Measurements, Recurring | Mortgages Held To Maturity
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Receivable, Fair Value Disclosure	99,191	82,319
Loans Held To Maturity Unpaid Principal	107,997	91,998
Difference	(8,806)	(9,679)
Fair Value, Measurements, Recurring | 90 or more days | Mortgages Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	602	0
Loans Held For Sale Unpaid Principal	608	0
Difference	(6)	0
Fair Value, Measurements, Recurring | 90 or more days | Mortgages Held To Maturity
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Receivable, Fair Value Disclosure	10,086	8,408
Loans Held To Maturity Unpaid Principal	11,781	11,082
Difference	$ (1,695)	$ (2,674)

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option-Changs in Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Measurements, Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) from fair value changes	$ 1,897	$ (4,439)	$ (11,719)	$ (9,080)
Consumer loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) from fair value changes	$ (187)	$ 0	$ (1,617)	$ 0

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 9,200,707	$ 8,309,159
Held-to-maturity securities	8,688,399	7,806,939
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases	67,911,810	66,323,583
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	9,402,926	8,387,444
Held-to-maturity securities	8,655,805	7,787,268
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases	67,698,855	66,294,639
Level 1 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0	0
Held-to-maturity securities	0	0
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases	0	0
Level 2 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	8,992,820	7,980,176
Held-to-maturity securities	8,655,805	7,787,268
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases	0	0
Level 3 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	410,106	407,268
Held-to-maturity securities	0	0
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases	67,698,855	66,294,639
Nonrecurring Basis
Assets measured at fair value on a nonrecurring basis
Impaired loans		(53,818)
Other real estate owned		(50,930)
Nonrecurring Basis | Fair Value
Assets measured at fair value on a nonrecurring basis
MSRs	182,043
Impaired loans	(68,159)
Other real estate owned	(42,041)
Nonrecurring Basis | Total Gains/(Losses)
Assets measured at fair value on a nonrecurring basis
MSRs	(318)
Impaired loans	3,976
Other real estate owned	1,759
Nonrecurring Basis | Level 1 | Fair Value
Assets measured at fair value on a nonrecurring basis
MSRs	0
Impaired loans	0
Other real estate owned	0
Nonrecurring Basis | Level 2 | Fair Value
Assets measured at fair value on a nonrecurring basis
MSRs	0
Impaired loans	0
Other real estate owned	0
Nonrecurring Basis | Level 3
Assets measured at fair value on a nonrecurring basis
MSRs		$ 171,309
Nonrecurring Basis | Level 3 | Fair Value
Assets measured at fair value on a nonrecurring basis
MSRs	182,043
Impaired loans	(68,159)
Other real estate owned	$ (42,041)

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Gross amounts of recognized assets	$ 320,826		$ 420,159
Derivative Liability, Fair Value, Gross Liability	293,650		370,647
Available-for-sale and other securities	15,453,061		15,562,837
Consumer loans	99,191		82,319
Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
MSRs	11,753		13,747
Available-for-sale and other securities	14,870,042		15,015,133
Fair Value, Measurements, Recurring | Level 3
Fair Value Disclosures [Abstract]
MSRs	11,753		13,747
Gross amounts of recognized assets	8,425		5,747
Derivative Liability, Fair Value, Gross Liability	5,459		7,870
Available-for-sale and other securities	2,982,154		2,874,047
Consumer loans	40,483		47,880
Fair Value, Measurements, Nonrecurring
Fair Value Disclosures [Abstract]
Impaired loans Fair Value Disclosure			53,818
Accrued income and other assets Fair Value Disclosure			50,930
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value Disclosures [Abstract]
MSRs			171,309
Asset-backed securities
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	555,191		793,481
Asset-backed securities | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	555,191		793,481
Asset-backed securities | Fair Value, Measurements, Recurring | Level 3
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	24,127		76,003
Municipal securities
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	3,426,109		3,250,057
Municipal securities | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	3,426,109		3,250,057
Municipal securities | Fair Value, Measurements, Recurring | Level 3
Fair Value Disclosures [Abstract]
Available-for-sale and other securities	$ 2,958,027		$ 2,798,044
Cost Approach Valuation Technique | Maximum | Fair Value, Measurements, Recurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	31.00%	34.40%
Spread over forward interest rate swap rates	0.1	0.092
Cost Approach Valuation Technique | Maximum | Fair Value, Measurements, Recurring | Private label CMO | Level 3
Fair Value Disclosures [Abstract]
Discount rate	10.30%	10.00%
Cumulative default	42.00%	37.80%
Loss given default	80.00%	80.00%
Cost Approach Valuation Technique | Maximum | Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	72.00%	73.00%
Discount rate	6.80%	12.00%
Cumulative default	100.00%	100.00%
Loss given default	100.00%	100.00%
Cure given deferral	100.00%	75.00%
Cost Approach Valuation Technique | Maximum | Fair Value, Measurements, Recurring | Loans held for investment | Level 3
Fair Value Disclosures [Abstract]
Discount rate	17.70%	16.20%
Cost Approach Valuation Technique | Maximum | Fair Value, Measurements, Nonrecurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	21.00%	30.40%
Spread over forward interest rate swap rates	0.2	0.2
Cost Approach Valuation Technique | Minimum | Fair Value, Measurements, Recurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	9.00%	5.63%
Spread over forward interest rate swap rates	0.080	0.030
Cost Approach Valuation Technique | Minimum | Fair Value, Measurements, Recurring | Private label CMO | Level 3
Fair Value Disclosures [Abstract]
Discount rate	0.00%	0.00%
Cumulative default	0.00%	0.30%
Loss given default	5.00%	5.00%
Cost Approach Valuation Technique | Minimum | Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	0.00%	0.00%
Discount rate	1.30%	5.00%
Cumulative default	2.90%	1.10%
Loss given default	90.00%	85.00%
Cure given deferral	0.00%	0.00%
Cost Approach Valuation Technique | Minimum | Fair Value, Measurements, Recurring | Loans held for investment | Level 3
Fair Value Disclosures [Abstract]
Discount rate	7.00%	5.40%
Cost Approach Valuation Technique | Minimum | Fair Value, Measurements, Nonrecurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	6.00%	5.57%
Spread over forward interest rate swap rates	0.018	0.042
Cost Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Recurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	12.00%	10.90%
Spread over forward interest rate swap rates	0.081	0.054
Cost Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Recurring | Private label CMO | Level 3
Fair Value Disclosures [Abstract]
Discount rate	4.00%	3.60%
Cumulative default	4.90%	4.00%
Loss given default	23.70%	24.10%
Cost Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	7.30%	6.50%
Discount rate	6.50%	6.30%
Cumulative default	8.60%	11.20%
Loss given default	97.80%	96.30%
Cure given deferral	0.00%	36.20%
Cost Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Recurring | Loans held for investment | Level 3
Fair Value Disclosures [Abstract]
Discount rate	8.20%	5.60%
Cost Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Nonrecurring | MSRs | Level 3
Fair Value Disclosures [Abstract]
Constant prepayment rate	8.00%	7.80%
Spread over forward interest rate swap rates	0.104	0.117
Market Approach Valuation Technique | Maximum | Fair Value, Measurements, Recurring | Derivative [Member] | Level 3
Fair Value Disclosures [Abstract]
Net market price	21.40%	25.40%
Estimated Pull through %	99.00%	99.80%
Market Approach Valuation Technique | Minimum | Fair Value, Measurements, Recurring | Derivative [Member] | Level 3
Fair Value Disclosures [Abstract]
Net market price	(4.00%)	(7.10%)
Estimated Pull through %	11.00%	8.10%
Market Approach Valuation Technique | Weighted Average | Fair Value, Measurements, Recurring | Derivative [Member] | Level 3
Fair Value Disclosures [Abstract]
Net market price	1.80%	1.10%
Estimated Pull through %	79.00%	76.90%

XML

FAIR VALUES OF ASSETS AND LIABILITIES - Balance Sheet Location (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Financial Assets:
Trading account securities		$ 88,488	$ 133,295
Loans held for sale	[1]	651,734	512,951
Available-for-sale and other securities		15,453,061	15,562,837
Held-to-maturity securities, Total		8,688,399	7,806,939
Net loans and direct financing leases		67,911,810	66,323,583
Derivatives		166,264	238,219
Financial Liabilities:
Deposits		78,445,113	75,607,717
Short-term borrowings		1,829,549	3,692,654
Long-term borrowings		9,200,707	8,309,159
Derivatives		59,124	98,286
Reported Value Measurement
Financial Assets:
Cash and short-term assets		1,243,828	1,443,037
Trading account securities		88,488	133,295
Loans held for sale		651,734	512,951
Available-for-sale and other securities		15,453,061	15,562,837
Held-to-maturity securities, Total		8,688,399	7,806,939
Net loans and direct financing leases		67,911,810	66,323,583
Derivatives		166,264	238,219
Financial Liabilities:
Deposits		78,445,113	75,607,717
Short-term borrowings		1,829,549	3,692,654
Long-term borrowings		9,200,707	8,309,159
Derivatives		59,124	98,286
Fair Value
Financial Assets:
Cash and short-term assets		1,243,828	1,443,037
Trading account securities		88,488	133,295
Loans held for sale		657,270	515,640
Available-for-sale and other securities		15,453,061	15,562,837
Held-to-maturity securities, Total		8,655,805	7,787,268
Net loans and direct financing leases		67,698,855	66,294,639
Derivatives		166,264	238,219
Financial Liabilities:
Deposits		78,422,971	76,161,091
Short-term borrowings		1,829,549	3,692,654
Long-term borrowings		9,402,926	8,387,444
Derivatives		59,124	98,286
Fair Value | Level 1
Financial Assets:
Held-to-maturity securities, Total		0	0
Net loans and direct financing leases		0	0
Financial Liabilities:
Deposits		0	0
Short-term borrowings		4	474
Long-term borrowings		0	0
Fair Value | Level 2
Financial Assets:
Held-to-maturity securities, Total		8,655,805	7,787,268
Net loans and direct financing leases		0	0
Financial Liabilities:
Deposits		75,230,127	72,319,328
Short-term borrowings		0	0
Long-term borrowings		8,992,820	7,980,176
Fair Value | Level 3
Financial Assets:
Held-to-maturity securities, Total		0	0
Net loans and direct financing leases		67,698,855	66,294,639
Financial Liabilities:
Deposits		3,192,844	3,841,763
Short-term borrowings		1,829,545	3,692,180
Long-term borrowings		$ 410,106	$ 407,268

[1] Amounts represent loans for which Huntington has elected the fair value option.

XML

DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) group	Sep. 30, 2016 USD ($)	Sep. 29, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)
Derivative [Line Items]
Increase (decrease) to net interest income due to derivative adjustment	$ 3,000,000	$ 18,000,000	$ 20,000,000	$ 58,000,000
Derivative Liability	59,124,000		59,124,000				$ 98,286,000
Gain (loss) to be reclassified during next 12 months, net	(1,000,000)		(1,000,000)
Purchase of interest rate caps and derivative financial instruments, notional value	9,700,000,000		9,700,000,000				10,800,000,000
Total notional amount corresponds to trading assets, fair value	1,000,000		1,000,000
Notional amount corresponds to trading liabilities, fair value (less than)	2,000,000		2,000,000
Credit risks from interest rate swaps used for trading purposes	156,000,000		$ 156,000,000				196,000,000
Number of primary groups | group			2
Aggregate credit risk, net of collateral	30,000,000		$ 30,000,000				26,000,000
Investment securities and cash collateral pledged by Huntington	144,000,000		144,000,000
Investment securities and cash collateral pledged to Huntington	78,000,000		78,000,000
Swap
Derivative [Line Items]
Derivative Liability	5,000,000		5,000,000
Derivative used in trading activity
Derivative [Line Items]
Net derivative asset (liability)	84,000,000		84,000,000				80,000,000
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value	21,000,000,000		21,000,000,000				21,000,000,000
Derivative used in Mortgage Banking Activities
Derivative [Line Items]
Purchase of interest rate caps and derivative financial instruments, notional value	188,000,000		188,000,000				300,000,000
Gains (losses) related to derivative instruments Included in total MSR	1,000,000	$ (1,000,000)	1,000,000	$ 17,000,000
Share Swap Economic Hedge
Derivative [Line Items]
Purchase of interest rate caps and derivative financial instruments, notional value	39,000,000		39,000,000		$ 31,000,000	$ 8,000,000		$ 20,000,000
Derivative, Fair Value, Net	1,000,000		1,000,000
Fair Value Hedging
Derivative [Line Items]
Purchase of interest rate caps and derivative financial instruments, notional value	8,375,000,000		8,375,000,000				7,475,000,000
Cash Flow Hedging
Derivative [Line Items]
Purchase of interest rate caps and derivative financial instruments, notional value	$ 1,325,000,000		$ 1,325,000,000				$ 3,325,000,000

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DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details) - USD ($)	Sep. 30, 2017	Sep. 29, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 9,700,000,000			$ 10,800,000,000
Asset derivatives included in accrued income and other assets
Total contracts	320,826,000			420,159,000
Liability derivatives included in accrued expenses and other liabilities
Total contracts	293,650,000			370,647,000
Accrued income and other assets
Asset derivatives included in accrued income and other assets
Interest rate contracts designated as hedging instruments	32,837,000			46,440,000
Interest rate contracts not designated as hedging instruments	198,471,000			232,653,000
Foreign exchange contracts not designated as hedging instruments	22,354,000			23,265,000
Commodities contracts not designated as hedging instruments	66,133,000			108,026,000
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	1,031,000			9,775,000
Total contracts	320,826,000			420,159,000
Accrued expenses and other liabilities
Liability derivatives included in accrued expenses and other liabilities
Interest rate contracts designated as hedging instruments	93,224,000			99,996,000
Interest rate contracts not designated as hedging instruments	112,534,000			140,475,000
Foreign exchange contracts not designated as hedging instruments	21,020,000			19,576,000
Commodities contracts not designated as hedging instruments	61,695,000			104,328,000
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	5,177,000			6,272,000
Total contracts	293,650,000			$ 370,647,000
Share Swap Economic Hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 39,000,000	$ 31,000,000	$ 8,000,000		$ 20,000,000

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DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Notional Disclosures [Abstract]
Derivative, Notional Amount	$ 9,700,000,000	$ 10,800,000,000
Fair Value Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	8,375,000,000	7,475,000,000
Cash Flow Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	1,325,000,000	3,325,000,000
Loan
Notional Disclosures [Abstract]
Derivative, Notional Amount	1,325,000,000	3,325,000,000
Loan | Fair Value Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	0
Loan | Cash Flow Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	1,325,000,000	3,325,000,000
Subordinated notes
Notional Disclosures [Abstract]
Derivative, Notional Amount	950,000,000	950,000,000
Subordinated notes | Fair Value Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	950,000,000	950,000,000
Subordinated notes | Cash Flow Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	0
Other long-term debt
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,425,000,000	6,525,000,000
Other long-term debt | Fair Value Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,425,000,000	6,525,000,000
Other long-term debt | Cash Flow Hedging
Notional Disclosures [Abstract]
Derivative, Notional Amount	$ 0	$ 0

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DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Managemen Add Info (Details Add Info) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative, Notional Amount	$ 9,700,000,000	$ 10,800,000,000
Additional information about the interest rate swaps used in companies Asset and Liability Management
Notional Value	$ 9,700,000,000	$ 10,800,000,000
Average Maturity (years)	2 years 4 months	2 years 4 months
Fair Value	$ (60,387,000)	$ (53,556,000)
Weighted-Average Rate Receive
Weighted-Average Rate Pay
Asset conversion swaps - Receive Fixed - Generic
Additional information about the interest rate swaps used in companies Asset and Liability Management
Notional Value	$ 1,325,000,000	$ 3,325,000,000
Average Maturity (years)	1 month 17 days	7 months 6 days
Fair Value	$ (1,239,000)	$ (2,060,000)
Weighted-Average Rate Receive	0.72%	1.04%
Weighted-Average Rate Pay	1.23%	0.91%
Liability conversion swaps - Receive Fixed - Generic
Additional information about the interest rate swaps used in companies Asset and Liability Management
Notional Value	$ 8,375,000,000	$ 7,475,000,000
Average Maturity (years)	2 years 10 months	3 years 1 month 6 days
Fair Value	$ (59,148,000)	$ (51,496,000)
Weighted-Average Rate Receive	1.56%	1.49%
Weighted-Average Rate Pay	1.29%	0.88%

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DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Cash Flow Hedging
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges
Amount of gain or (loss) recognized in OCI on derivatives (effective portion)	$ 1,225	$ (5,311)	$ 828	$ 5,231
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	144	123	(1,131)	769
Deposits | Interest expense deposits
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	0	0	0	(82)
Hedged Deposits | Interest expense deposits
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	0	0	0	72
Subordinated notes | Interest expense subordinated notes and other long term debt
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	(2,234)	(9,688)	(4,665)	(2,880)
Hedged Subordinated notes | Interest expense subordinated notes and other long term debt
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	3,615	10,400	6,782	3,591
Other long-term debt | Interest expense subordinated notes and other long term debt
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	(6,431)	(45,870)	(880)	37,179
Hedged Other long term debt | Interest expense subordinated notes and other long term debt
Increase or (decrease) to interest expense for derivatives designated as fair value hedges
Increase or (decrease) to interest expense for derivatives designated as fair value hedges	7,152	42,647	(1,226)	(38,187)
Loan | Interest and fee income loans and leases | Cash Flow Hedging
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges
Amount of gain or (loss) recognized in OCI on derivatives (effective portion)	1,225	(5,311)	828	5,231
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	144	123	(1,131)	770
Securities Investment | Interest and fee income investment securities | Cash Flow Hedging
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges
Amount of gain or (loss) recognized in OCI on derivatives (effective portion)	0	0	0	0
Amount of gain or (loss) reclassified from accumulated OCI into earnings (effective portion)	$ 0	$ 0	$ 0	$ (1)

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DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Loan
Derivative Instruments, Gain (Loss) [Line Items]
Gains and (losses) recognized in noninterest income on the ineffective portion on interest rate contracts for derivatives designated as cash flow hedges	$ 359	$ (371)	$ 225	$ 6

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DERIVATIVE FINANCIAL INSTRUMENTS - Mortgage Banking Activities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative assets:
Total derivative assets	$ 320,826		$ 320,826		$ 420,159
Derivative liabilities:
Total derivative liabilities	(293,650)		(293,650)		(370,647)
Interest rate lock agreements
Derivative assets:
Total derivative assets	8,425		8,425		5,747
Derivative liabilities:
Total derivative liabilities	282		282		1,598
Forward trades and options
Derivative assets:
Total derivative assets	1,562		1,562		13,319
Derivative liabilities:
Total derivative liabilities	1,782		1,782		1,173
Derivative used in Mortgage Banking Activities
Derivatives, Fair Value [Line Items]
Gains losses related to derivative instruments Included in Mortgage securities	1,000	$ (1,000)	1,000	$ 17,000
Derivative assets:
Total derivative assets	9,987		9,987		19,066
Derivative liabilities:
Total derivative liabilities	$ 2,064		$ 2,064		$ 2,771

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DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Offsetting Derivative Assets [Abstract]
Gross amounts of recognized assets	$ 320,826	$ 420,159
Gross amounts offset in the condensed consolidated balance sheets	154,562	181,940
Net amounts of assets presented in the condensed consolidated balance sheets	166,264	238,219
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments	(23,350)	(34,328)
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral received	(16,895)	(5,428)
Net amount	$ 126,019	$ 198,463

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DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Offsetting Derivative Liabilities [Abstract]
Gross amounts of recognized liabilities	$ 293,650	$ 370,647
Gross amounts offset in the condensed consolidated balance sheets	(234,526)	(272,361)
Derivative liabilities	59,124	98,286
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments	0	(7,550)
Gross amounts not offset in the condensed consolidated balance sheets, Cash collateral received	(26,766)	(23,943)
Net amount	$ 32,358	$ 66,793

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VIEs - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Jun. 30, 2015
Trust 2016 Unconsolidated [Member]
Variable Interest Entity [Line Items]
Total of automobile loans transferred in securitization transactions	$ 1,500
2015-1 Automobile Trust
Variable Interest Entity [Line Items]
Total of automobile loans transferred in securitization transactions		$ 750

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VIEs - Consolidated (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash	$ 1,193,738	$ 1,384,770
Net loans and leases	67,911,810	66,323,583
Accrued income and other assets	2,055,270	2,062,976
Total assets	101,988,126	99,714,097
Liabilities
Long-term borrowings	9,200,707	8,309,159
Accrued interest and other liabilities	1,813,908	1,796,421
Total liabilities	91,289,277	89,405,951
Equity
Total liabilities and shareholders’ equity	101,988,126	99,714,097
Trust 2016 Unconsolidated [Member]
Variable Interest Entity [Line Items]
Total Assets	8,674	14,770
Total Liabilities	0	0
Maximum Exposure to Loss	8,674	14,770
Huntington Technology Funding Trust Series 2014A
Assets
Cash	1,569	1,564
Net loans and leases	33,148	69,825
Accrued income and other assets	0	0
Total assets	34,717	71,389
Liabilities
Long-term borrowings	28,120	57,494
Accrued interest and other liabilities	0	0
Total liabilities	28,120	57,494
Equity
Beneficial interest owned by third party	6,597	13,895
Total liabilities and shareholders’ equity	34,717	71,389
Franklin 2009 Trust
Assets
Cash	0	0
Net loans and leases	0	0
Accrued income and other assets	269	281
Total assets	269	281
Liabilities
Long-term borrowings	0	0
Accrued interest and other liabilities	269	281
Total liabilities	269	281
Equity
Beneficial interest owned by third party	0	0
Total liabilities and shareholders’ equity	269	281
Consolidated Trusts
Assets
Cash	1,569	1,564
Net loans and leases	33,148	69,825
Accrued income and other assets	269	281
Total assets	34,986	71,670
Liabilities
Long-term borrowings	28,120	57,494
Accrued interest and other liabilities	269	281
Total liabilities	28,389	57,775
Equity
Beneficial interest owned by third party	6,597	13,895
Total liabilities and shareholders’ equity	$ 34,986	$ 71,670

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VIEs - Unconsolidated VIEs (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Trust 2016 Unconsolidated [Member]
Variable Interest Entity [Line Items]
Total Assets	$ 8,674	$ 14,770
Total Liabilities	0	0
Maximum Exposure to Loss	8,674	14,770
2015-1 Automobile Trust
Variable Interest Entity [Line Items]
Total Assets	1,506	2,227
Total Liabilities	0	0
Maximum Exposure to Loss	1,506	2,227
Trust Preferred Securities
Variable Interest Entity [Line Items]
Total Assets	13,919	13,919
Total Liabilities	252,577	252,552
Maximum Exposure to Loss	0	0
Low Income Housing Tax Credit Partnerships
Variable Interest Entity [Line Items]
Total Assets	638,171	576,880
Total Liabilities	348,733	292,721
Maximum Exposure to Loss	638,171	576,880
Other Investments
Variable Interest Entity [Line Items]
Total Assets	108,556	79,195
Total Liabilities	48,339	42,316
Maximum Exposure to Loss	108,556	79,195
Total
Variable Interest Entity [Line Items]
Total Assets	770,826	686,991
Total Liabilities	649,649	587,589
Maximum Exposure to Loss	$ 756,907	$ 673,072

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VIEs - Trust preferred Securities (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2017 USD ($)
Summary of Outstanding Trust Preferred Securities
Principal amount of subordinated note/ debenture issued to trust	$ 252,577
Investment in unconsolidated subsidiary	$ 13,919
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]
Maximum year to defer payment of interest on Debenture	5 years
Huntington Capital I
Summary of Outstanding Trust Preferred Securities
Interest rate on Trust Preferred Securities	2.01%
Principal amount of subordinated note/ debenture issued to trust	$ 69,730
Investment in unconsolidated subsidiary	$ 6,186
Huntington Capital I | London Interbank Offered Rate (LIBOR) [Member]
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]
Rate spread over three month LIBOR	0.70%
Huntington Capital II
Summary of Outstanding Trust Preferred Securities
Interest rate on Trust Preferred Securities	1.95%
Principal amount of subordinated note/ debenture issued to trust	$ 32,093
Investment in unconsolidated subsidiary	$ 3,093
Huntington Capital II | London Interbank Offered Rate (LIBOR) [Member]
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]
Rate spread over three month LIBOR	0.625%
Sky Financial Capital Trust III
Summary of Outstanding Trust Preferred Securities
Interest rate on Trust Preferred Securities	2.74%
Principal amount of subordinated note/ debenture issued to trust	$ 72,165
Investment in unconsolidated subsidiary	$ 2,165
Sky Financial Capital Trust III | London Interbank Offered Rate (LIBOR) [Member]
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]
Rate spread over three month LIBOR	1.40%
Sky Financial Capital Trust IV
Summary of Outstanding Trust Preferred Securities
Interest rate on Trust Preferred Securities	2.70%
Principal amount of subordinated note/ debenture issued to trust	$ 74,320
Investment in unconsolidated subsidiary	$ 2,320
Camco Financial Trust
Summary of Outstanding Trust Preferred Securities
Interest rate on Trust Preferred Securities	3.76%
Principal amount of subordinated note/ debenture issued to trust	$ 4,269
Investment in unconsolidated subsidiary	$ 155
Camco Financial Trust | London Interbank Offered Rate (LIBOR) [Member]
Summary of Outstanding Trust Preferred Securities (Textuals) [Abstract]
Rate spread over three month LIBOR	1.33%

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VIEs - Low Income Housing Tax Credit Partnership (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Low Income Housing Tax Credit Partnerships
Variable Interest Entity [Line Items]
Affordable housing tax credit investments	$ 980,984		$ 980,984		$ 877,237
Less: amortization	(342,813)		(342,813)		(300,357)
Net affordable housing tax credit investments	638,171		638,171		576,880
Unfunded commitments	348,733		348,733		$ 292,721
Tax credits and other tax benefits recognized	22,471	$ 21,200	68,426	$ 57,634
Proportional Amortization Method
Variable Interest Entity [Line Items]
Tax credit amortization expense included in provision for income taxes	17,292	13,608	51,474	38,513
Equity Method
Variable Interest Entity [Line Items]
Tax credit investment (gains) losses included in noninterest income	$ 0	$ 132	$ 0	$ 396

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COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Commercial
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	$ 16,056,609	$ 15,190,056
Consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	12,977,175	12,235,943
Commercial Real Estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	1,373,127	1,697,671
Standby Letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	547,689	637,182
Commercial | Letter of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	$ 16,815	$ 4,610

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COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016	Sep. 28, 2015
Loss Contingencies [Line Items]
Maturity period of majority of standby letters of credit		P2Y
Maturity period of Commercial letters of credit		P90D
Maturity period of forward contracts relating mortgage banking business		1 year
Cyberco Litigation
Loss Contingencies [Line Items]
Bankruptcy Court recommended judgment amount in Cyberco case, principal				$ 72,000
Standby Letters of Credit
Loss Contingencies [Line Items]
Carrying amount of deferred revenue associated with guarantees	$ 5,000	$ 5,000	$ 8,000
Outstanding standby letters of credit	547,689	547,689	637,182
Commitments to Sell Loans
Loss Contingencies [Line Items]
Commitments to sell residential real estate loans	1,000,000	1,000,000	$ 819,000
Maximum
Loss Contingencies [Line Items]
Aggregate range of reasonably possible losses current legal proceedings	65,000	$ 65,000
Cash [Member] | FirstMerit Overdraft Litigation [Member]
Loss Contingencies [Line Items]
Settlement amount	9,000
Debt forgiveness [Member] | FirstMerit Overdraft Litigation [Member]
Loss Contingencies [Line Items]
Settlement amount	7,000
Insurance Settlement [Member] | FirstMerit Overdraft Litigation [Member]
Loss Contingencies [Line Items]
Settlement amount	$ 4,400
Reimbursement percent	49.00%

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SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) reporting_unit	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segments business	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reporting segments | segments			4
Maximum business banking customer's revenue			$ 20,000
Number of business banking businesses | business			254,000
Net interest income	$ 758,433	$ 625,390	$ 2,232,920	$ 1,634,337
Provision (reduction in allowance) for credit losses	(43,590)	(63,805)	(136,206)	(115,896)
Noninterest income	330,097	302,415	967,778	815,394
Noninterest expense	680,428	712,247	2,082,214	1,726,988
Income taxes	89,944	24,749	227,875	133,989
Net income	274,568	127,004	754,403	472,858
Assets	101,988,126		101,988,126		$ 99,714,097
Deposits	78,445,113		78,445,113		75,607,717
Operating Segments | Consumer & Business Banking
Segment Reporting Information [Line Items]
Net interest income	426,752	349,283	1,255,617	911,706
Provision (reduction in allowance) for credit losses	(24,089)	(12,724)	(74,270)	(43,474)
Noninterest income	189,378	177,234	544,445	459,732
Noninterest expense	415,874	349,470	1,242,152	967,417
Income taxes	61,658	57,513	169,274	126,191
Net income	114,509	106,810	314,366	234,356
Assets	25,989,043		25,989,043		25,332,635
Deposits	$ 45,694,477		45,694,477		45,355,745
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Number of reporting units | reporting_unit	6
Net interest income	$ 171,448	143,023	514,900	355,263
Provision (reduction in allowance) for credit losses	(9,580)	(23,788)	(21,378)	(53,212)
Noninterest income	59,121	54,744	176,609	150,228
Noninterest expense	100,003	87,892	301,385	246,941
Income taxes	42,345	30,130	129,061	71,868
Net income	78,641	55,957	239,685	133,470
Assets	24,199,091		24,199,091		24,121,689
Deposits	20,795,143		20,795,143		18,053,208
Operating Segments | CREVF
Segment Reporting Information [Line Items]
Net interest income	139,870	126,489	419,556	317,704
Provision (reduction in allowance) for credit losses	(9,705)	(25,615)	(40,047)	(18,706)
Noninterest income	10,969	8,001	34,750	25,951
Noninterest expense	55,354	44,331	163,989	125,254
Income taxes	30,022	22,590	87,594	69,893
Net income	55,758	41,954	162,676	129,802
Assets	24,723,324		24,723,324		23,576,832
Deposits	2,052,274		2,052,274		1,893,072
Operating Segments | RBPCG
Segment Reporting Information [Line Items]
Net interest income	49,596	41,971	145,089	112,473
Provision (reduction in allowance) for credit losses	(216)	(1,663)	(510)	(490)
Noninterest income	46,215	45,339	140,610	126,245
Noninterest expense	58,237	57,473	182,171	166,645
Income taxes	13,076	9,861	36,056	25,054
Net income	24,282	18,313	66,962	46,529
Assets	5,695,880		5,695,880		5,327,622
Deposits	5,944,240		5,944,240		6,214,250
Treasury / Other
Segment Reporting Information [Line Items]
Net interest income	(29,233)	(35,376)	(102,242)	(62,809)
Provision (reduction in allowance) for credit losses	0	(15)	(1)	(14)
Noninterest income	24,414	17,097	71,364	53,238
Noninterest expense	50,960	173,081	192,517	220,731
Income taxes	(57,157)	(95,345)	(194,110)	(159,017)
Net income	1,378	$ (96,030)	(29,286)	$ (71,299)
Assets	21,380,788		21,380,788		21,355,319
Deposits	$ 3,958,979		$ 3,958,979		$ 4,091,442