Huntington Bancshares (HBAN) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page	9 Months Ended
	Sep. 30, 2021shares
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity Registrant Name	Huntington Bancshares Incorporated
Entity Incorporation, State or Country Code	MD
Entity File Number	1-34073
Entity Tax Identification Number	31-0724920
Entity Address, Address Line One	41 South High Street
Entity Address, City or Town	Columbus
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43287
City Area Code	614
Local Phone Number	480-2265
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)	1,446,461,249
Entity Central Index Key	0000049196
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Common Stock-Par Value $0.01 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock—Par Value $0.01 per Share
Trading Symbol	HBAN
Security Exchange Name	NASDAQ
Series H Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares (each representing a 1/40th interest in a share of 4.500% Series H Non-Cumulative, perpetual preferred stock)
Trading Symbol	HBANP
Security Exchange Name	NASDAQ
Series I Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares (each representing a 1/100th interest in a share of 5.70% Series I Non-Cumulative, perpetual preferred stock)
Trading Symbol	HBANM
Security Exchange Name	NASDAQ

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks		$ 1,611,000	$ 1,319,000
Interest-bearing deposits at Federal Reserve Bank		8,134,000	5,276,000
Interest-bearing deposits in banks		443,000	117,000
Trading account securities		77,000	62,000
Available-for-sale securities		25,654,000	16,485,000
Held-to-maturity securities		12,455,000	8,861,000
Other securities		649,000	418,000
Loans held for sale (includes $1,297 and $1,198 respectively, measured at fair value)(1)	[1]	1,335,000	1,275,000
Loans and leases (includes $139 and $94 respectively, measured at fair value)(1)	[1]	110,567,000	81,608,000
Allowance for loan and lease losses		(2,107,000)	(1,814,000)
Net loans and leases		108,460,000	79,794,000
Bank owned life insurance		2,771,000	2,577,000
Premises and equipment		1,126,000	757,000
Goodwill		5,316,000	1,990,000
Servicing rights and other intangible assets		614,000	428,000
Other assets		5,233,000	3,679,000
Total assets		173,878,000	123,038,000
Liabilities
Demand deposits—noninterest-bearing		44,560,000	28,553,000
Interest-bearing		97,338,000	70,395,000
Total deposits		141,898,000	98,948,000
Short-term borrowings		435,000	183,000
Long-term debt		7,779,000	8,352,000
Other liabilities		4,267,000	2,562,000
Total liabilities		154,379,000	110,045,000
Commitments and Contingent Liabilities (Note 16)
Shareholders’ equity
Preferred stock		2,267,000	2,191,000
Common stock		15,000	10,000
Capital surplus		15,350,000	8,781,000
Less treasury shares, at cost		(79,000)	(59,000)
Accumulated other comprehensive (loss) gain		(125,000)	192,000
Retained earnings		2,051,000	1,878,000
Total Huntington Bancshares Inc shareholders’ equity		19,479,000	12,993,000
Non-controlling interest		20,000	0
Total equity		19,499,000	12,993,000
Total liabilities and shareholders’ equity		$ 173,878,000	$ 123,038,000
Common shares authorized (par value of $0.01) (in shares)		2,250,000,000	1,500,000,000
Common shares outstanding (in shares)		1,446,461,249	1,017,196,776
Treasury shares outstanding (in shares)		6,306,127	5,062,054
Preferred stock, authorized shares (in shares)		6,617,808	6,617,808
Preferred shares outstanding (in shares)		657,500	750,500
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets
Loans held for sale, fair value	$ 1,297	$ 1,198
Loans and leases, fair value	$ 139	$ 94
Shareholders’ equity
Common stock, par value (in usd per share)	$ 0.01	$ 0.01

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and fee income:
Loans and leases	$ 1,056,000	$ 764,000	$ 2,614,000	$ 2,327,000
Available-for-sale securities
Taxable	68,000	50,000	184,000	191,000
Tax-exempt	15,000	15,000	41,000	47,000
Held-to-maturity securities—taxable	47,000	51,000	124,000	169,000
Other securities—taxable	2,000	1,000	6,000	4,000
Other	17,000	11,000	40,000	31,000
Total interest income	1,205,000	892,000	3,009,000	2,769,000
Interest expense:
Deposits	11,000	31,000	34,000	182,000
Short-term borrowings	0	0	0	13,000
Long-term debt	34,000	44,000	5,000	175,000
Total interest expense	45,000	75,000	39,000	370,000
Net interest income	1,160,000	817,000	2,970,000	2,399,000
Provision for credit losses	(62,000)	177,000	89,000	945,000
Net interest income after provision for credit losses	1,222,000	640,000	2,881,000	1,454,000
Mortgage banking income	81,000	122,000	248,000	277,000
Service charges on deposit accounts	114,000	76,000	271,000	223,000
Card and payment processing income	96,000	66,000	241,000	183,000
Trust and investment management services	61,000	48,000	169,000	140,000
Leasing revenue	42,000	3,000	58,000	14,000
Capital markets fees	40,000	27,000	104,000	91,000
Insurance income	25,000	24,000	77,000	72,000
Bank owned life insurance income	15,000	17,000	47,000	49,000
Gain on sale of loans	2,000	13,000	8,000	30,000
Net gains (losses) on sales of securities	0	0	10,000	(1,000)
Other noninterest income	59,000	34,000	141,000	104,000
Total noninterest income	535,000	430,000	1,374,000	1,182,000
Personnel costs	643,000	453,000	1,703,000	1,267,000
Outside data processing and other services	304,000	98,000	581,000	273,000
Equipment	79,000	44,000	180,000	132,000
Net occupancy	95,000	40,000	209,000	119,000
Lease financing equipment depreciation	19,000	0	24,000	1,000
Professional services	26,000	12,000	91,000	34,000
Amortization of intangibles	13,000	10,000	34,000	31,000
Marketing	25,000	9,000	54,000	23,000
Deposit and other insurance expense	17,000	6,000	33,000	24,000
Other noninterest expense	68,000	40,000	245,000	135,000
Total noninterest expense	1,289,000	712,000	3,154,000	2,039,000
Income before income taxes	468,000	358,000	1,101,000	597,000
Provision for income taxes	90,000	55,000	206,000	96,000
Income after income taxes	378,000	303,000	895,000	501,000
Income attributable to non-controlling interest	1,000	0	1,000	0
Net income attributable to Huntington Bancshares Inc	377,000	303,000	894,000	501,000
Dividends on preferred shares	29,000	28,000	103,000	65,000
Other Preferred Stock Dividends and Adjustments	15,000	0	15,000	0
Net income applicable to common shares	$ 333,000	$ 275,000	$ 776,000	$ 436,000
Average common shares—basic (in shares)	1,462,736	1,017,253	1,201,763	1,017,052
Average common shares—diluted (in shares)	1,487,335	1,031,460	1,225,428	1,031,573
Per common share:
Net income—basic (in usd per share)	$ 0.23	$ 0.27	$ 0.65	$ 0.43
Net income—diluted (in usd per share)	$ 0.22	$ 0.27	$ 0.63	$ 0.42

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income attributable to Huntington Bancshares Inc	$ 377,000	$ 303,000	$ 894,000	$ 501,000
Net unrealized gains (losses) on available-for-sale securities	(82,000)	5,000	(220,000)	240,000
Change in fair value related to cash flow hedges	(29,000)	(40,000)	(102,000)	279,000
Translation adjustments, net of hedges	2,000	0	(4,000)	0
Change in accumulated unrealized gains (losses) for pension and other post-retirement obligations	3,000	2,000	9,000	(6,000)
Other comprehensive income (loss), net of tax	(106,000)	(33,000)	(317,000)	513,000
Comprehensive income	$ 271,000	$ 270,000	$ 577,000	$ 1,014,000

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	6.250% Series D Non-Cumulative, perpetual preferred stock	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Preferred StockSeries I Preferred Stock	Preferred Stock6.250% Series D Non-Cumulative, perpetual preferred stock	Common Stock-Par Value $0.01 per share	Common Stock-Par Value $0.01 per shareCommon Stock-Par Value $0.01 per share	Capital Surplus	Capital SurplusSeries I Preferred Stock	Capital SurplusCommon Stock-Par Value $0.01 per share	Treasury Stock	Treasury StockCommon Stock-Par Value $0.01 per share	Accumulated Other Comprehensive Gain (Loss)	Retained Earnings	Retained EarningsSeries I Preferred Stock	Retained Earnings6.250% Series D Non-Cumulative, perpetual preferred stock	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Total	Total6.250% Series D Non-Cumulative, perpetual preferred stock	TotalCumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest
Balance, beginning of period at Dec. 31, 2019	$ 11,795,000			$ 1,203,000			$ 10,000		$ 8,806,000			$ (56,000)		$ (256,000)	$ 2,088,000				$ 11,795,000			$ 0
Balance, beginning of period (ASU 2016-13) at Dec. 31, 2019			$ (306,000)															$ (306,000)			$ (306,000)
Balance, beginning of period (in shares) at Dec. 31, 2019							1,024,541					(4,537)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Huntington Bancshares Inc	501,000														501,000				501,000
Other comprehensive income, net of tax	513,000													513,000					513,000
Net proceeds from issuance of Preferred Stock	988,000			988,000															988,000
Repurchases of common stock (in shares)							(7,088)
Issuance of Series C preferred stock	(88,000)						$ 0		(88,000)										(88,000)
Cash dividends declared:
Common	(466,000)														(466,000)				(466,000)
Preferred	(65,000)														(65,000)	$ 0	$ (29,000)		(65,000)
Recognition of the fair value of share-based compensation	60,000								60,000										60,000
Other share-based compensation activity (in shares)							4,924
Other share-based compensation activity	(12,000)						$ 0		(12,000)						0				(12,000)
Other (in shares)												(529)
Other	(3,000)								0			$ (3,000)			0				(3,000)
Balance, end of period at Sep. 30, 2020	12,917,000			2,191,000			$ 10,000		8,766,000			$ (59,000)		257,000	1,752,000				12,917,000			0
Balance, end of period (in shares) at Sep. 30, 2020							1,022,377					(5,066)
Cash dividends declared:
Income after income taxes	501,000
Income attributable to non-controlling interest	0
Balance, beginning of period at Jun. 30, 2020	12,314,000			1,697,000			$ 10,000		8,743,000			$ (59,000)		290,000	1,633,000				12,314,000			0
Balance, beginning of period (in shares) at Jun. 30, 2020							1,022,309					(4,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Huntington Bancshares Inc	303,000														303,000				303,000
Other comprehensive income, net of tax	(33,000)													(33,000)					(33,000)
Net proceeds from issuance of Preferred Stock	494,000			494,000															494,000
Cash dividends declared:
Common	(156,000)														(156,000)				(156,000)
Preferred	(28,000)														(28,000)	0	(10,000)		(28,000)
Recognition of the fair value of share-based compensation	21,000								21,000										21,000
Other share-based compensation activity (in shares)							68
Other share-based compensation activity	2,000						$ 0		2,000						0				2,000
Other (in shares)												(67)
Other	0											$ 0							0
Balance, end of period at Sep. 30, 2020	12,917,000			2,191,000			$ 10,000		8,766,000			$ (59,000)		257,000	1,752,000				12,917,000			0
Balance, end of period (in shares) at Sep. 30, 2020							1,022,377					(5,066)
Cash dividends declared:
Income after income taxes	303,000
Income attributable to non-controlling interest	0
Balance, beginning of period at Dec. 31, 2020	12,993,000			2,191,000			$ 10,000		8,781,000			$ (59,000)		192,000	1,878,000				12,993,000			0
Balance, beginning of period (in shares) at Dec. 31, 2020							1,022,258					(5,062)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Huntington Bancshares Inc	894,000														894,000				894,000
Other comprehensive income, net of tax	(317,000)													(317,000)					(317,000)
Stock Issued During Period, Shares, Acquisitions								458,171
Stock Issued During Period, Value, Acquisitions	6,961,000				$ 175,000			$ 5,000		$ 10,000	$ 6,993,000		$ (37,000)						6,961,000
Stock Issued During Period, Value, Other	185,000																		185,000
Net proceeds from issuance of Preferred Stock	486,000			486,000															486,000
Repurchases of common stock (in shares)							(33,409)
Issuance of Series C preferred stock	(500,000)	$ (600,000)				$ (585,000)	$ 0		(500,000)								(15,000)		(500,000)	$ (600,000)
Cash dividends declared:
Common	(601,000)														(601,000)				(601,000)
Preferred	(103,000)														(103,000)	(5,000)	(18,000)		(103,000)
Recognition of the fair value of share-based compensation	97,000								97,000										97,000
Other share-based compensation activity (in shares)							5,747
Other share-based compensation activity	(31,000)						$ 0		(31,000)						0				(31,000)
Other (in shares)												1,244
Other	12,000								0			$ 17,000		0	(2,000)				15,000			(3,000)
Balance, end of period at Sep. 30, 2021	19,499,000			2,267,000			$ 15,000		15,350,000			$ (79,000)		(125,000)	2,051,000				19,479,000			20,000
Balance, end of period (in shares) at Sep. 30, 2021							1,452,767					(6,306)
Cash dividends declared:
Income after income taxes	895,000
Noncontrolling Interest, Increase from Business Combination	22,000																					22,000
Income attributable to non-controlling interest	1,000
Balance, beginning of period at Jun. 30, 2021	20,531,000			2,851,000			$ 15,000		15,830,000			$ (105,000)		(19,000)	1,939,000				20,511,000			20,000
Balance, beginning of period (in shares) at Jun. 30, 2021							1,484,614					(8,056)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Huntington Bancshares Inc	377,000														377,000				377,000
Other comprehensive income, net of tax	$ (106,000)													(106,000)					(106,000)
Repurchases of common stock (in shares)	(33,400)						(33,409)
Issuance of Series C preferred stock	$ (500,000)	$ (600,000)				$ (585,000)	$ 0		(500,000)								(15,000)		(500,000)	$ (600,000)
Cash dividends declared:
Common	(221,000)														(221,000)				(221,000)
Preferred	(29,000)														(29,000)	$ (2,000)	$ 0		(29,000)
Recognition of the fair value of share-based compensation	32,000								32,000										32,000
Other share-based compensation activity (in shares)							1,562
Other share-based compensation activity	(12,000)						$ 0		(12,000)						0				(12,000)
Other (in shares)												1,750
Other	26,000											$ 26,000			0				27,000			(1,000)
Balance, end of period at Sep. 30, 2021	19,499,000			$ 2,267,000			$ 15,000		$ 15,350,000			$ (79,000)		$ (125,000)	$ 2,051,000				$ 19,479,000			$ 20,000
Balance, end of period (in shares) at Sep. 30, 2021							1,452,767					(6,306)
Cash dividends declared:
Income after income taxes	378,000
Income attributable to non-controlling interest	$ 1,000

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Common (in usd per share)	$ 0.15	$ 0.15	$ 0.45	$ 0.45

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	$ 89	$ 945
Depreciation and amortization	299	258
Share-based compensation expense	97	60
Deferred income tax expense (benefit)	40	(123)
Net change in:
Trading account securities	(15)	45
Loans held for sale	(115)	(395)
Other assets	(247)	(919)
Other liabilities	455	890
Other, net	67	(3)
Net cash provided by operating activities	1,565	1,259
Investing activities
Change in interest bearing deposits in banks	611	(80)
Net cash received from business combination	466	0
Proceeds from:
Maturities and calls of available-for-sale securities	5,408	3,657
Maturities and calls of held-to-maturity securities	3,073	2,028
Sales of available-for-sale securities	5,860	392
Purchases of available-for-sale securities	(14,995)	(5,988)
Purchases of held-to-maturity securities	(3,685)	0
Net proceeds from sales of portfolio loans and leases	479	696
Principal payments received under direct finance and sales-type leases	899	518
Net loan and lease activity, excluding sales and purchases	4,121	(6,099)
Purchases of premises and equipment	(157)	(82)
Purchases of loans and leases	(771)	(1,248)
Net cash paid for branch disposition	618	0
Other, net	98	54
Net cash provided by (used in) investing activities	789	(6,152)
Financing activities
Increase in deposits	5,136	12,807
Decrease in short-term borrowings	(1,062)	(2,306)
Net proceeds from issuance of long-term debt	646	1,348
Maturity/redemption of long-term debt	(2,649)	(2,218)
Dividends paid on preferred stock	(109)	(55)
Dividends paid on common stock	(531)	(460)
Repurchases of common stock	(500)	(88)
Payment to repurchase preferred stock	(600)	0
Net proceeds from issuance of preferred stock	486	988
Other, net	(21)	(18)
Net cash provided by financing activities	796	9,998
Increase in cash and cash equivalents	3,150	5,105
Cash and cash equivalents at beginning of period	6,595	1,170
Cash and cash equivalents at end of period	9,745	6,275
Supplemental disclosures:
Interest paid	135	307
Income taxes paid	262	48
Non-cash activities
Loans transferred to held-for-sale from portfolio	385	839
Loans transferred to portfolio from held-for-sale	83	37
Transfer of securities from available-for-sale to held-to-maturity	3,007	1,520
Income after income taxes	895	501
TCF Financial Corporation
Non-cash activities
Fair value of tangible assets acquired	46,256	0
Goodwill and other intangible assets	3,483	0
Liabilities assumed	42,534	0
Preferred Stock
Non-cash activities
Stock issued in business combination		0
Preferred Stock | TCF Financial Corporation
Non-cash activities
Stock issued in business combination	185
Common Stock-Par Value $0.01 per share
Non-cash activities
Stock issued in business combination		$ 0
Common Stock-Par Value $0.01 per share | TCF Financial Corporation
Non-cash activities
Stock issued in business combination	$ 6,998

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2021
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. 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 2020 Annual Report on 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 and interest-bearing deposits at Federal Reserve Bank. Certain prior period amounts have been reclassified to conform to current year’s presentation.

ACQUISITION OF TCF FINANCIAL CO

ACQUISITION OF TCF FINANCIAL CORPORATION	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
ACQUISITION OF TCF FINANCIAL CORPORATION	ACQUISITION OF TCF FINANCIAL CORPORATION On June 9, 2021, Huntington closed the acquisition of TCF Financial Corporation in an all-stock transaction valued at $7.2 billion. TCF was a financial holding company headquartered in Detroit, Michigan with operations across the Midwest. The acquisition added depth in existing markets and new markets for expansion and brings complimentary businesses together to drive synergies and growth. Under the terms of the agreement, TCF shareholders received 3.0028 shares of Huntington common stock for each share of TCF common stock. Holders of TCF common stock also received cash in lieu of fractional shares. In addition, each outstanding share of 5.70% Series C Non-Cumulative Perpetual Preferred Stock of TCF was converted into one share of a newly created series of preferred stock of Huntington, Series I Preferred Stock. The acquisition of TCF has been accounted for as a business combination. We recorded the estimate of fair value based on initial valuations available at June 9, 2021. We continue to review these valuations and certain of these estimated fair values are considered preliminary as of September 30, 2021, and subject to adjustment for up to one year after June 9, 2021. While we believe that the information available on June 9, 2021 provided a reasonable basis for estimating fair value, we expect that we may obtain additional information and evidence during the measurement period that would result in changes to the estimated fair value amounts. Valuations subject to change include, but are not limited to, loans and leases, certain deposits, deferred tax assets and liabilities and certain other assets and other liabilities. The following table provides a preliminary allocation of consideration paid for the fair value of assets acquired and liabilities and equity assumed from TCF as of June 9, 2021. TCF (dollar amounts in millions) UPB Fair Value Assets acquired: Cash and due from banks $ 466 Interest-bearing deposits at Federal Reserve Bank 719 Interest-bearing deposits in banks 312 Available-for-sale securities 8,900 Other securities 358 Loans held for sale 363 Loans and leases: Commercial: Commercial and industrial $ 12,726 12,441 Commercial real estate 8,125 7,869 Lease financing 2,929 2,912 Total commercial 23,780 23,222 Consumer: Automobile 322 317 Residential mortgage 6,267 6,273 Home equity 2,644 2,607 RV and marine 581 570 Other consumer 179 167 Total consumer 9,993 9,934 Total loans and leases $ 33,773 33,156 Bank owned life insurance 181 Premises and equipment 360 Core deposit intangible 92 Other intangible assets 6 Servicing rights 59 Servicing rights and other intangible assets 157 Other assets 1,441 Total assets acquired 46,413 Liabilities and equity assumed: Deposits 38,663 Short-term borrowings 1,306 Long-term debt 1,516 Other liabilities 1,049 Total liabilities 42,534 Non-controlling interest 22 Net assets acquired $ 3,857 Consideration: Fair value of common stock issued $ 6,998 Fair value of preferred stock exchange 185 Total consideration $ 7,183 Goodwill $ 3,326 In connection with the acquisition, the Company recorded approximately $3.3 billion of goodwill. The goodwill was the result of expected synergies, operational efficiencies and other factors. Information regarding the allocation of goodwill recorded as a result of the acquisition to the Company’s reportable segments, as well as the carrying amounts and amortization of core deposit and other intangible assets, are provided in Note 7 “ Goodwill and Other Intangible Assets ” of the Notes to Unaudited Condensed Consolidated Financial Statements. The following is a description of the methods used to determine the fair values of significant assets and liabilities presented above. Cash and due from banks and interest-bearing deposits in banks: The carrying amount of these assets is a reasonable estimate of fair value based on the short-term nature of these assets. Securities: Fair values for securities are based on quoted market prices, where available. If quoted market prices are not available, fair value estimates are based on observable inputs including quoted market prices for similar instruments, quoted market prices that are not in an active market or other inputs that are observable in the market. In the absence of observable inputs, fair value is estimated based on pricing models and/or discounted cash flow methodologies. Loans and leases: Fair values for loans and leases are based on a discounted cash flow methodology that considered factors including the type of loan and lease and related collateral, classification status, fixed or variable interest rate, term, amortization status and current discount rates. Loans and leases are grouped together according to similar characteristics when applying various valuation techniques. The discount rates used for loans and leases are based on current market rates for new originations of comparable loans and leases and include adjustments for liquidity. The discount rate does not include a factor for credit losses as that has been included as a reduction to the estimated cash flows. CDI: This intangible asset represents the low cost of funding acquired core deposits provide relative to the Company’s marginal cost of funds. The fair value was estimated based on a discounted cash flow methodology that gave appropriate consideration to expected customer attrition rates, net maintenance cost of the deposit base, alternative cost of funds, and the interest costs associated with customer deposits. The CDI is being amortized over 10 years based upon the period over which estimated economic benefits are estimated to be received. Deposits: The fair values used for the demand and savings deposits by definition equal the amount payable on demand at the acquisition date. The fair values for time deposits are estimated using a discounted cash flow calculation that applies interest rates currently being offered to the contractual interest rates on such time deposits. Debt: The fair values of long-term debt instruments are estimated based on quoted market prices for the instrument if available, or for similar instruments if not available, or by using discounted cash flow analyses, based on current incremental borrowing rates for similar types of instruments. Premises and equipment: The fair values of premises are based on a market approach, with Huntington obtaining third-party appraisals and broker opinions of value for land, office and branch space. Servicing rights: Servicing rights are valued using an option-adjusted spread valuation model to project cash flows over multiple interest rate scenarios which are then discounted at risk-adjusted rates. The model considers portfolio characteristics, prepayment rates, delinquency rates, contractually specified servicing fees, late charges, other ancillary revenue, costs to service and other economic factors. PCD loans and leases Purchased loans and leases that reflect a more-than-insignificant deterioration of credit from origination are considered PCD. For PCD loans and leases, the initial estimate of expected credit losses is recognized in the ALLL on the date of acquisition using the same methodology as other loans and leases held-for-investment. The following table provides a summary of loans and leases purchased as part of the TCF acquisition with credit deterioration at acquisition: (dollar amounts in millions) Commercial Consumer Total Par value (UPB) $ 7,931 $ 1,333 $ 9,264 ALLL at acquisition (374) (58) (432) Non-credit (discount) (219) (68) (287) Fair value $ 7,338 $ 1,207 $ 8,545 Huntington's operating results for the quarter and year-to-date periods ended September 30, 2021 include the operating results of the acquired assets and assumed liabilities of TCF Financial Corporation subsequent to the acquisition on June 9, 2021. Due to the various conversions of TCF systems during the second quarter 2021, as well as other streamlining and integration of the operating activities into those of the Company, historical reporting for the former TCF operations is impracticable and thus disclosures of the revenue from the assets acquired and income before income taxes is impracticable for the period subsequent to acquisition. The following table presents unaudited pro forma information as if the acquisition of TCF had occurred on January 1, 2020 under the “Unaudited Pro Forma” columns. The pro forma adjustments give effect to any change in interest income due to the accretion of the discount (premium) associated with the fair value adjustments to acquired loans and leases, any change in interest expense due to estimated premium amortization/discount accretion associated with the fair value adjustment to acquired interest-bearing deposits and long-term debt and the amortization of the CDI that would have resulted had the deposits been acquired as of January 1, 2020. Pro forma results include Huntington acquisition-related expenses which primarily included, but were not limited to, severance costs, professional services, data processing fees, marketing and advertising expenses totaling $234 million and $524 million for the three and nine-months ended September 30, 2021, respectively. Pro forma results also include adjustments for the elimination of TCF’s accretion of the discount (premium) associated with the fair value adjustments to acquired loans and leases, deposits and long-term debt, elimination of TCF's intangible amortization expense, and related income tax effects. The pro forma information does not necessarily reflect the results of operations that would have occurred had Huntington acquired TCF on January 1, 2020. Furthermore, cost savings and other business synergies related to the acquisition are not reflected in the pro forma amounts. Unaudited Pro Forma for Three months ended Nine months ended September 30, September 30, (dollar amounts in millions) 2021 2020 2021 2020 Net interest income $ 1,160 $ 1,197 $ 3,625 $ 3,581 Noninterest income 535 554 1,604 1,586 Net income attributable to Huntington Bancshares Inc 377 364 1,268 433

INVESTMENT SECURITIES AND OTHER

INVESTMENT SECURITIES AND OTHER SECURITIES	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES AND OTHER SECURITIES	INVESTMENT SECURITIES AND OTHER SECURITIES Debt securities purchased in which Huntington has the intent and ability to hold to their maturity are classified as held-to-maturity securities. All other debt and equity securities are classified as either available-for-sale or other securities. The following tables provide amortized cost, fair value, and gross unrealized gains and losses by investment category at September 30, 2021 and December 31, 2020: Unrealized (dollar amounts in millions) Amortized Gross Gross Fair Value September 30, 2021 Available-for-sale securities: U.S. Treasury $ 5 $ — $ — $ 5 Federal agencies: Residential CMO 3,683 63 (12) 3,734 Residential MBS 14,413 47 (123) 14,337 Commercial MBS 1,522 11 (35) 1,498 Other agencies 263 1 — 264 Total U.S. Treasury, federal agency and other agency securities 19,886 122 (170) 19,838 Municipal securities 3,570 82 (18) 3,634 Private-label CMO 120 — — 120 Asset-backed securities 284 3 (2) 285 Corporate debt 1,789 5 (21) 1,773 Other securities/Sovereign debt 4 — — 4 Total available-for-sale securities $ 25,653 $ 212 $ (211) $ 25,654 Held-to-maturity securities: Federal agencies: Residential CMO $ 2,701 $ 56 $ (4) $ 2,753 Residential MBS 7,079 62 (33) 7,108 Commercial MBS 2,468 77 (1) 2,544 Other agencies 205 7 — 212 Total federal agency and other agency securities 12,453 202 (38) 12,617 Municipal securities 2 — — 2 Total held-to-maturity securities $ 12,455 $ 202 $ (38) $ 12,619 Other securities, at cost: Non-marketable equity securities: Federal Home Loan Bank stock $ 52 $ — $ — $ 52 Federal Reserve Bank stock 511 — — 511 Other securities, at fair value Mutual funds 62 — — 62 Equity securities 24 — — 24 Total other securities $ 649 $ — $ — $ 649 (1) Amortized cost amounts excludes accrued interest receivable, which is recorded within other assets on the Consolidated Balance Sheet s . At September 30, 2021, accrued interest receivable on available-for-sale securities and held-to-maturity securities totaled $60 million and $26 million, respectively. Unrealized (dollar amounts in millions) Amortized Gross Gross Fair Value December 31, 2020 Available-for-sale securities: U.S. Treasury $ 5 $ — $ — $ 5 Federal agencies: Residential CMO 3,550 121 (5) 3,666 Residential MBS 7,843 97 (5) 7,935 Commercial MBS 1,151 21 (9) 1,163 Other agencies 60 2 — 62 Total U.S. Treasury, federal agency and other agency securities 12,609 241 (19) 12,831 Municipal securities 2,928 91 (15) 3,004 Private-label CMO 9 — — 9 Asset-backed securities 185 7 — 192 Corporate debt 440 5 — 445 Other securities/Sovereign debt 4 — — 4 Total available-for-sale securities $ 16,175 $ 344 $ (34) $ 16,485 Held-to-maturity securities: Federal agencies: Residential CMO $ 1,779 $ 88 $ — $ 1,867 Residential MBS 3,715 103 — 3,818 Commercial MBS 3,118 191 — 3,309 Other agencies 246 12 — 258 Total federal agency and other agency securities 8,858 394 — 9,252 Municipal securities 3 — — 3 Total held-to-maturity securities $ 8,861 $ 394 $ — $ 9,255 Other securities, at cost: Non-marketable equity securities: Federal Home Loan Bank stock $ 60 $ — $ — $ 60 Federal Reserve Bank stock 299 — — 299 Other securities, at fair value Mutual funds 50 — — 50 Equity securities 8 1 — 9 Total other securities $ 417 $ 1 $ — $ 418 (1) Amortized cost amounts excludes accrued interest receivable, which is recorded within other assets on the Consolidated Balance Sheet s . At December 31, 2020, accrued interest receivable on available-for-sale securities and held-to-maturity securities totaled $32 million and $20 million, respectively. The following table provides the amortized cost and fair value of securities by contractual maturity at September 30, 2021 and December 31, 2020. Expected maturities may differ from contractual maturities as issuers may have the right to call or prepay obligations with or without incurring penalties. September 30, 2021 December 31, 2020 (dollar amounts in millions) Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities: Under 1 year $ 354 $ 351 $ 308 $ 304 After 1 year through 5 years 1,665 1,668 1,145 1,154 After 5 years through 10 years 2,935 2,962 1,607 1,654 After 10 years 20,699 20,673 13,115 13,373 Total available-for-sale securities $ 25,653 $ 25,654 $ 16,175 $ 16,485 Held-to-maturity securities: After 1 year through 5 years $ 80 $ 83 $ 160 $ 169 After 5 years through 10 years 70 72 131 138 After 10 years 12,305 12,464 8,570 8,948 Total held-to-maturity securities $ 12,455 $ 12,619 $ 8,861 $ 9,255 The following tables provide detail on investment securities with unrealized losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position at September 30, 2021 and December 31, 2020: Less than 12 Months Over 12 Months Total (dollar amounts in millions) Fair Gross Unrealized Fair Gross Unrealized Fair Gross Unrealized September 30, 2021 Available-for-sale securities: Federal agencies: Residential CMO 1,064 (7) 120 (5) 1,184 (12) Residential MBS 10,212 (123) — — 10,212 (123) Commercial MBS 900 (31) 25 (4) 925 (35) Other agencies 119 — — — 119 — Total federal agency and other agency securities 12,295 (161) 145 (9) 12,440 (170) Municipal securities 339 (8) 377 (10) 716 (18) Private-label CMO 58 — — — 58 — Asset-backed securities 186 (1) 7 (1) 193 (2) Corporate debt 1,184 (20) 28 (1) 1,212 (21) Total temporarily impaired available-for-sale securities $ 14,062 $ (190) $ 557 $ (21) $ 14,619 $ (211) Held-to-maturity securities: Federal agencies: Residential CMO $ 1,032 $ (4) $ — $ — $ 1,032 $ (4) Residential MBS $ 4,398 $ (33) $ — $ — $ 4,398 $ (33) Commercial MBS 271 (1) — — 271 (1) Total federal agency and other agency securities 5,701 (38) — — 5,701 (38) Total temporarily impaired held-to-maturity securities $ 5,701 $ (38) $ — $ — $ 5,701 $ (38) Less than 12 Months Over 12 Months Total (dollar amounts in millions) Fair Gross Unrealized Fair Gross Unrealized Fair Gross Unrealized December 31, 2020 Available-for-sale securities: Federal agencies: Residential CMO $ 302 $ (5) $ — $ — $ 302 $ (5) Residential MBS 1,633 (5) — — 1,633 (5) Commercial MBS 321 (9) — — 321 (9) Total federal agency and other agency securities 2,256 (19) — — 2,256 (19) Municipal securities 110 (3) 490 (12) 600 (15) Asset-backed securities 15 — — — 15 — Corporate debt 51 — — — 51 — Total temporarily impaired available-for-sale securities $ 2,432 $ (22) $ 490 $ (12) $ 2,922 $ (34) During the 2021 second quarter, Huntington transferred $3.0 billion of securities from the AFS portfolio to the HTM portfolio. At the time of the transfer, AOCI included $2 million of unrealized gains attributed to these securities. This gain will be amortized into interest income over the remaining life of the securities. At September 30, 2021 and December 31, 2020, the carrying value of investment securities pledged to secure public and trust deposits, trading account liabilities, U.S. Treasury demand notes, security repurchase agreements and to support borrowing capacity totaled $23.2 billion and $14.4 billion, respectively. There were no securities of a single issuer, which were not governmental or government-sponsored, that exceeded 10% of shareholders’ equity at either September 30, 2021 or December 31, 2020. At September 30, 2021, all HTM debt securities are considered AAA rated. In addition, there were no HTM debt securities considered past due at September 30, 2021. AFS Securities Impairment/HTM Securities Allowance for Credit Losses Based on an evaluation of available information including security type, counterparty credit quality, past events, current conditions, and reasonable and supportable forecasts that are relevant to collectability, Huntington has concluded that it expects to receive all contractual cash flows from each security held in its AFS and HTM debt securities portfolio. As such, no allowance or impairment is recorded with respect to securities as of September 30, 2021 and December 31, 2020.

LOANS _ LEASES

LOANS / LEASES	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
LOANS / LEASES	LOANS AND LEASES The following table provides a detailed listing of Huntington’s loan and lease portfolio at September 30, 2021 and December 31, 2020. (dollar amounts in millions) September 30, 2021 December 31, 2020 Commercial loan and lease portfolio: Commercial and industrial $ 40,452 $ 33,151 Commercial real estate 14,694 7,199 Lease financing 4,991 2,222 Total commercial loan and lease portfolio 60,137 42,572 Consumer loan portfolio: Automobile 13,305 12,778 Residential mortgage 18,922 12,141 Home equity 10,919 8,894 RV and marine 5,052 4,190 Other consumer 2,232 1,033 Total consumer loan portfolio 50,430 39,036 Total loans and leases (1) (2) 110,567 81,608 Allowance for loan and lease losses (2,107) (1,814) Net loans and leases $ 108,460 $ 79,794 (1) Loans and leases are reported at principal amount outstanding including unamortized purchase premiums and discounts, unearned income, and net direct fees and costs associated with originating and acquiring loans and leases. The aggregate amount of these loan and lease adjustments was a net (discount) premium of $(85) million and $171 million at September 30, 2021 and December 31, 2020, respectively. (2) The total amount of accrued interest recorded for these loans and leases at September 30, 2021, was $146 million and $143 million of commercial and consumer loan and lease portfolios, respectively, and at December 31, 2020, was $146 million and $123 million of commercial and consumer loan and lease portfolios, respectively. Accrued interest is presented in other assets within the Condensed Consolidated Balance Sheet s. Lease Financing Huntington leases equipment to customers, and substantially all such arrangements are classified as either sales-type or direct financing leases, which are included in commercial loans and leases. These leases are reported at the aggregate of lease payments receivable and estimated residual values, net of unearned and deferred income, and any initial direct costs incurred to originate these leases. Huntington assesses net investments in leases (including residual values) for impairment and recognizes any impairment losses in accordance with the impairment guidance for financial instruments. As such, net investments in leases may be reduced by an ACL, with changes recognized as provision expense. The following table presents net investments in lease financing receivables by category at September 30, 2021 and December 31, 2020. (dollar amounts in millions) September 30, December 31, Lease payments receivable $ 4,622 $ 1,737 Estimated residual value of leased assets 781 664 Gross investment in lease financing receivables 5,403 2,401 Deferred origination costs 24 21 Deferred fees, unearned income and other (436) (200) Total lease financing receivables $ 4,991 $ 2,222 The carrying value of residual values guaranteed was $463 million and $93 million as of September 30, 2021 and December 31, 2020, respectively. The future lease rental payments due from customers on sales-type and direct financing leases at September 30, 2021, totaled $4.6 billion and were due as follows: $0.8 billion in 2021, $0.8 billion in 2022, $0.8 billion in 2023, $0.8 billion in 2024, $0.7 billion in 2025, and $0.7 billion thereafter. Interest income recognized for these types of leases was $73 million and $26 million for the three-month periods ended September 30, 2021 and 2020, respectively. For the nine-month periods ended September 30, 2021 and 2020, interest income recognized was $154 million and $81 million, respectively. Nonaccrual and Past Due Loans and Leases The following table presents NALs by class at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (dollar amounts in millions) Nonaccrual loans and leases with no ACL Total nonaccrual loans and leases Nonaccrual loans and leases with no ACL Total nonaccrual loans and leases Commercial and industrial $ 141 $ 494 $ 69 $ 349 Commercial real estate 27 103 8 15 Lease financing 2 60 — 4 Automobile — 3 — 4 Residential mortgage — 108 — 88 Home equity — 87 — 70 RV and marine — 6 — 2 Other consumer — — — — Total nonaccrual loans and leases $ 170 $ 861 $ 77 $ 532 The following table presents an aging analysis of loans and leases, by class at September 30, 2021 and December 31, 2020: September 30, 2021 Past Due (1) Loans Accounted for Under FVO Total Loans 90 or (dollar amounts in millions) 30-59 60-89 90 or Total Current Commercial and industrial $ 86 $ 28 $ 80 $ 194 $ 40,258 $ — $ 40,452 $ 6 Commercial real estate 9 5 18 32 14,662 — 14,694 — Lease financing 87 20 19 126 4,865 — 4,991 12 (2) Automobile 61 13 7 81 13,224 — 13,305 5 Residential mortgage 106 44 212 362 18,422 138 18,922 138 (3) Home equity 42 14 65 121 10,797 1 10,919 10 RV and marine 12 2 3 17 5,035 — 5,052 2 Other consumer 11 3 2 16 2,216 — 2,232 2 Total loans and leases $ 414 $ 129 $ 406 $ 949 $ 109,479 $ 139 $ 110,567 $ 175 December 31, 2020 Past Due (1)(4) Loans Accounted for Under FVO Total Loans 90 or (dollar amounts in millions) 30-59 60-89 90 or Total Current Commercial and industrial $ 38 $ 33 $ 82 $ 153 $ 32,998 $ — $ 33,151 $ — Commercial real estate — 1 11 12 7,187 — 7,199 — Lease financing 22 5 13 40 2,182 — 2,222 10 (2) Automobile 84 22 12 118 12,660 — 12,778 9 Residential mortgage 114 38 194 346 11,702 93 12,141 132 (3) Home equity 35 15 61 111 8,782 1 8,894 14 RV and marine 17 3 3 23 4,167 — 4,190 3 Other consumer 9 4 3 16 1,017 — 1,033 3 Total loans and leases $ 319 $ 121 $ 379 $ 819 $ 80,695 $ 94 $ 81,608 $ 171 (1) NALs are included in this aging analysis based on the loan’s past due status. (2) Amounts include Huntington Technology Finance administrative lease delinquencies. (3) Amounts include mortgage loans insured by U.S. government agencies. (4) The principal balance of loans in payment deferral programs offered in response to the COVID-19 pandemic which are performing according to their modified terms are generally not considered delinquent. Credit Quality Indicators See Note 5 “Loans/Leases” to the Consolidated Financial Statements appearing in Huntington’s 2020 Annual Report on Form 10-K for a description of the credit quality indicators Huntington utilizes for monitoring credit quality and for determining an appropriate ACL level. To facilitate the monitoring of credit quality for commercial loans, and for purposes of determining an appropriate ACL level for these loans, Huntington utilizes the following internally defined categories of credit grades: • Pass - Higher quality loans that do not fit any of the other categories described below. • OLEM - The credit risk may be relatively minor yet represents a risk given certain specific circumstances. If the potential weaknesses are not monitored or mitigated, the loan may weaken or the collateral may be inadequate to protect Huntington’s position in the future. For these reasons, Huntington considers the loans to be potential problem loans. • Substandard - Inadequately protected loans resulting from the borrower’s ability to repay, equity, and/or the collateral pledged to secure the loan. These loans have identified weaknesses that could hinder normal repayment or collection of the debt. It is likely Huntington will sustain some loss if any identified weaknesses are not mitigated. • Doubtful - Loans that have all of the weaknesses inherent in those loans classified as Substandard, with the added elements of the full collection of the loan is improbable and that the possibility of loss is high. Loans are generally assigned a category of “ Pass ” rating upon initial approval and subsequently updated as appropriate based on the borrower’s financial performance. Commercial loans categorized as OLEM, Substandard, or Doubtful are considered Criticized loans. Commercial loans categorized as Substandard or Doubtful are both considered Classified loans. For all classes within the consumer loan portfolios, loans are assigned pool level PD factors based on the FICO range within which the borrower’s credit bureau score falls. A credit bureau score is a credit score developed by FICO based on data provided by the credit bureaus. The credit bureau score is widely accepted as the standard measure of consumer credit risk used by lenders, regulators, rating agencies, and consumers. The higher the credit bureau score, the higher likelihood of repayment and therefore, an indicator of higher credit quality. Huntington assesses the risk in the loan portfolio by utilizing numerous risk characteristics. The classifications described above, and also presented in the table below, represent one of those characteristics that are closely monitored in the overall credit risk management processes. The following tables present the amortized cost basis of loans and leases by vintage and credit quality indicator at September 30, 2021 and December 31, 2020 respectively: As of September 30, 2021 Term Loans Amortized Cost Basis by Origination Year Revolver Total at Amortized Cost Basis Revolver Total Converted to Term Loans (dollar amounts in millions) 2021 2020 2019 2018 2017 Prior Total Commercial and industrial Credit Quality Indicator (1): Pass $ 10,821 $ 6,941 $ 4,246 $ 2,626 $ 1,222 $ 1,320 $ 10,698 $ 3 $ 37,877 OLEM 148 204 176 122 33 81 133 — 897 Substandard 182 171 266 244 146 193 469 — 1,671 Doubtful 1 — — 4 — 1 1 — 7 Total Commercial and industrial $ 11,152 $ 7,316 $ 4,688 $ 2,996 $ 1,401 $ 1,595 $ 11,301 $ 3 $ 40,452 Commercial real estate Credit Quality Indicator (1): Pass $ 2,561 $ 2,813 $ 2,939 $ 1,769 $ 929 $ 1,286 $ 613 $ — $ 12,910 OLEM 57 172 77 78 82 46 1 — 513 Substandard 280 284 329 134 149 77 18 — 1,271 Total Commercial real estate $ 2,898 $ 3,269 $ 3,345 $ 1,981 $ 1,160 $ 1,409 $ 632 $ — $ 14,694 Lease financing Credit Quality Indicator (1): Pass $ 1,383 $ 1,655 $ 915 $ 499 $ 282 $ 168 $ — $ — $ 4,902 OLEM 8 10 9 4 4 1 — — 36 Substandard 3 14 18 1 8 9 — — 53 Total Lease financing $ 1,394 $ 1,679 $ 942 $ 504 $ 294 $ 178 $ — $ — $ 4,991 Automobile Credit Quality Indicator (2): 750+ $ 2,250 $ 2,112 $ 1,563 $ 785 $ 441 $ 174 $ — $ — $ 7,325 650-749 1,879 1,442 867 458 212 96 — — 4,954 <650 283 252 200 149 87 55 — — 1,026 Total Automobile $ 4,412 $ 3,806 $ 2,630 $ 1,392 $ 740 $ 325 $ — $ — $ 13,305 Residential mortgage Credit Quality Indicator (2): 750+ $ 4,359 $ 4,253 $ 1,214 $ 678 $ 817 $ 2,132 $ — $ — $ 13,453 650-749 1,443 960 420 301 270 975 — — 4,369 <650 39 56 99 125 102 541 — — 962 Total Residential mortgage $ 5,841 $ 5,269 $ 1,733 $ 1,104 $ 1,189 $ 3,648 $ — $ — $ 18,784 Home equity Credit Quality Indicator (2): 750+ $ 570 $ 812 $ 101 $ 70 $ 61 $ 459 $ 4,796 $ 201 $ 7,070 650-749 138 156 98 62 38 232 2,320 172 3,216 <650 5 10 30 28 23 114 331 91 632 Total Home equity $ 713 $ 978 $ 229 $ 160 $ 122 $ 805 $ 7,447 $ 464 $ 10,918 RV and marine Credit Quality Indicator (2): 750+ $ 1,022 $ 982 $ 495 $ 518 $ 301 $ 364 $ — $ — $ 3,682 650-749 312 303 190 173 117 167 — — 1,262 <650 5 11 17 20 22 33 — — 108 Total RV and marine $ 1,339 $ 1,296 $ 702 $ 711 $ 440 $ 564 $ — $ — $ 5,052 Other consumer Credit Quality Indicator (2): 750+ $ 486 $ 217 $ 239 $ 83 $ 32 $ 73 $ 586 $ 2 $ 1,718 650-749 42 32 46 14 5 7 282 24 452 <650 3 2 7 3 1 2 26 18 62 Total Other consumer $ 531 $ 251 $ 292 $ 100 $ 38 $ 82 $ 894 $ 44 $ 2,232 (1) Consistent with the credit quality disclosures, indicators for the Commercial portfolio are based on internally defined categories of credit grades which are generally refreshed at least semi-annually. (2) Consistent with the credit quality disclosures, indicators for the Consumer portfolio are based on updated customer credit scores refreshed at least quarterly. As of December 31, 2020 Term Loans Amortized Cost Basis by Origination Year Revolver Total at Amortized Cost Basis Revolver Total Converted to Term Loans (dollar amounts in millions) 2020 2019 2018 2017 2016 Prior Total Commercial and industrial Credit Quality Indicator (1): Pass $ 12,599 $ 4,161 $ 2,537 $ 1,192 $ 837 $ 815 $ 8,894 $ 2 $ 31,037 OLEM 415 112 65 24 32 22 124 — 794 Substandard 195 125 181 203 41 147 423 — 1,315 Doubtful 2 — 1 — — 1 1 — 5 Total Commercial and industrial $ 13,211 $ 4,398 $ 2,784 $ 1,419 $ 910 $ 985 $ 9,442 $ 2 $ 33,151 Commercial real estate Credit Quality Indicator (1): Pass $ 1,742 $ 1,610 $ 1,122 $ 507 $ 507 $ 539 $ 633 $ — $ 6,660 OLEM 94 78 63 37 28 14 4 — 318 Substandard 27 46 10 29 58 14 36 — 220 Doubtful — — — — — 1 — — 1 Total Commercial real estate $ 1,863 $ 1,734 $ 1,195 $ 573 $ 593 $ 568 $ 673 $ — $ 7,199 Lease financing Credit Quality Indicator (1): Pass $ 1,158 $ 364 $ 221 $ 155 $ 137 $ 101 $ — $ — $ 2,136 OLEM 6 4 4 6 1 — — — 21 Substandard 1 19 7 21 5 12 — — 65 Total Lease financing $ 1,165 $ 387 $ 232 $ 182 $ 143 $ 113 $ — $ — $ 2,222 Automobile Credit Quality Indicator (2): 750+ $ 2,670 $ 2,013 $ 1,144 $ 742 $ 317 $ 81 $ — $ — $ 6,967 650-749 1,965 1,343 755 386 175 52 — — 4,676 <650 312 301 244 157 84 37 — — 1,135 Total Automobile $ 4,947 $ 3,657 $ 2,143 $ 1,285 $ 576 $ 170 $ — $ — $ 12,778 Residential mortgage Credit Quality Indicator (2): 750+ $ 3,269 $ 1,370 $ 891 $ 1,064 $ 762 $ 1,243 $ 1 $ — $ 8,600 650-749 991 435 307 278 171 495 — — 2,677 <650 34 89 111 108 81 348 — — 771 Total Residential mortgage $ 4,294 $ 1,894 $ 1,309 $ 1,450 $ 1,014 $ 2,086 $ 1 $ — $ 12,048 Home equity Credit Quality Indicator (2): 750+ $ 793 $ 26 $ 26 $ 32 $ 89 $ 451 $ 4,373 $ 192 $ 5,982 650-749 147 9 8 11 27 157 1,906 181 2,446 <650 1 1 1 1 6 70 286 99 465 Total Home equity $ 941 $ 36 $ 35 $ 44 $ 122 $ 678 $ 6,565 $ 472 $ 8,893 RV and marine Credit Quality Indicator (2): 750+ $ 1,136 $ 525 $ 589 $ 337 $ 153 $ 254 $ — $ — $ 2,994 650-749 348 215 201 136 64 129 — — 1,093 <650 4 15 21 22 12 29 — — 103 Total RV and marine $ 1,488 $ 755 $ 811 $ 495 $ 229 $ 412 $ — $ — $ 4,190 Other consumer Credit Quality Indicator (2): 750+ $ 69 $ 58 $ 26 $ 8 $ 4 $ 14 $ 340 $ 2 $ 521 650-749 36 56 17 5 2 3 294 30 443 <650 2 8 3 1 — 1 26 28 69 Total Other consumer $ 107 $ 122 $ 46 $ 14 $ 6 $ 18 $ 660 $ 60 $ 1,033 (1) Consistent with the credit quality disclosures, indicators for the Commercial portfolio are based on internally defined categories of credit grades which are generally refreshed at least semi-annually. (2) Consistent with the credit quality disclosures, indicators for the Consumer portfolio are based on updated customer credit scores refreshed at least quarterly. 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 would not otherwise be considered. However, not all loan modifications are TDRs. See Note 5 “Loans / Leases” to the Consolidated Financial Statements appearing in Huntington’s 2020 Annual Report on Form 10-K 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, 2021 and 2020. New Troubled Debt Restructurings (1) Three Months Ended September 30, 2021 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 16 $ — $ 3 $ — $ — $ 3 Commercial real estate 4 — — — — — Automobile 498 — 3 1 — 4 Residential mortgage 74 — 7 2 — 9 Home equity 42 — 1 1 — 2 RV and marine 19 — — — — — Other consumer 49 — — — — — Total new TDRs 702 $ — $ 14 $ 4 $ — $ 18 Three Months Ended September 30, 2020 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 39 $ — $ 28 $ — $ — $ 28 Commercial real estate 2 — — — — — Automobile 726 — 5 2 — 7 Residential mortgage 242 — 40 2 — 42 Home equity 90 — 2 3 1 6 RV and marine 30 — 1 — — 1 Other consumer 122 1 — — — 1 Total new TDRs 1,251 $ 1 $ 76 $ 7 $ 1 $ 85 New Troubled Debt Restructurings (1) Nine Months Ended September 30, 2021 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 53 $ 15 $ 23 $ — $ — $ 38 Commercial real estate 4 — — — — — Automobile 1,914 — 13 3 — 16 Residential mortgage 232 — 31 4 — 35 Home equity 155 — 3 5 — 8 RV and marine finance 103 1 1 1 — 3 Other consumer 214 — — — 1 1 Total new TDRs 2,675 $ 16 $ 71 $ 13 $ 1 $ 101 Nine Months Ended September 30, 2020 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 277 $ — $ 116 $ — $ 58 $ 174 Commercial real estate 11 — 3 — — 3 Automobile 2,582 — 26 5 — 31 Residential mortgage 448 — 62 5 — 67 Home equity 216 — 5 6 2 13 RV and marine finance 126 — 4 — — 4 Other consumer 513 3 — — — 3 Total new TDRs 4,173 $ 3 $ 216 $ 16 $ 60 $ 295 (1) TDRs may include multiple concessions and the disclosure classifications are based on the primary concession provided to the borrower. (2) Post-modification balances approximate pre-modification balances. Pledged Loans The Bank has access to the Federal Reserve’s discount window and advances from the FHLB. As of September 30, 2021 and December 31, 2020, these borrowings and advances are secured by $45.9 billion and $43.0 billion, respectively, of loans.

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Allowance for Credit Losses	ALLOWANCE FOR CREDIT LOSSES Allowance for Credit Losses - Roll-forward The following tables present ACL activity by portfolio segment for the three-month and nine-month periods ended September 30, 2021 and 2020. (dollar amounts in millions) Commercial Consumer Total Three-month period ended September 30, 2021: ALLL balance, beginning of period $ 1,618 $ 600 $ 2,218 Loan and lease charge-offs (74) (32) (106) Recoveries of loans and leases previously charged-off 27 24 51 Provision (benefit) for loan and lease losses (22) (34) (56) ALLL balance, end of period $ 1,549 $ 558 $ 2,107 AULC balance, beginning of period $ 76 $ 28 $ 104 Provision for unfunded lending commitments 2 (8) (6) AULC balance, end of period $ 78 $ 20 $ 98 ACL balance, end of period $ 1,627 $ 578 $ 2,205 Nine-month period ended September 30, 2021: ALLL balance, beginning of period $ 1,236 $ 578 $ 1,814 Loan and lease charge-offs (213) (90) (303) Recoveries of loans and leases previously charged-off 58 64 122 Provision for loan and lease losses (1) 94 (52) 42 Allowance on loans and leases purchased with credit deterioration 374 58 432 ALLL balance, end of period $ 1,549 $ 558 $ 2,107 AULC balance, beginning of period $ 34 $ 18 $ 52 Provision for unfunded lending commitments (2) 45 2 47 Unfunded lending commitment losses (1) — (1) AULC balance, end of period $ 78 $ 20 $ 98 ACL balance, end of period $ 1,627 $ 578 $ 2,205 (dollar amounts in millions) Commercial Consumer Total Three-month period ended September 30, 2020: ALLL balance, beginning of period $ 1,169 $ 533 $ 1,702 Loan and lease charge-offs (101) (40) (141) Recoveries of loans and leases previously charged-off 12 16 28 Provision for loan and lease losses 183 24 207 ALLL balance, end of period $ 1,263 $ 533 $ 1,796 AULC balance, beginning of period $ 81 $ 38 $ 119 Provision (reduction in allowance) for unfunded lending commitments (27) (3) (30) Unfunded lending commitment losses (7) — (7) AULC balance, end of period $ 47 $ 35 $ 82 ACL balance, end of period $ 1,310 $ 568 $ 1,878 Nine-month period ended September 30, 2020: ALLL balance, beginning of period $ 552 $ 231 $ 783 Cumulative-effect of change in accounting principle for financial instruments - credit losses (3) 180 211 391 Loan and lease charge-offs (272) (128) (400) Recoveries of loans and leases previously charged-off 20 43 63 Provision for loan and lease losses 783 176 959 ALLL balance, end of period $ 1,263 $ 533 $ 1,796 AULC balance, beginning of period $ 102 $ 2 $ 104 Cumulative-effect of change in accounting principle for financial instruments - credit losses (3) (38) 40 2 Provision (reduction in allowance) for unfunded lending commitments (7) (7) (14) Unfunded lending commitment losses (10) — (10) AULC balance, end of period $ 47 $ 35 $ 82 ACL balance, end of period $ 1,310 $ 568 $ 1,878 (1) Includes $234 million of TCF acquisition initial provision for credit losses related to non-PCD loans and leases. (2) Includes $60 million from acquired unfunded lending commitments. (3) Relates to day one impact of the CECL adjustment as a result of the implementation of ASU 2016-13. At September 30, 2021, the ACL was $2.2 billion, an increase of $339 million from the December 31, 2020 balance of $1.9 billion. The increase was primarily related to the addition of $432 million of allowance for loans purchased with credit deterioration and the TCF acquisition initial provision for credit losses of $294 million ($234 million from non-PCD loans and leases and $60 million from acquired unfunded lending commitments), partially offset by improvement in the forecasted macroeconomic environment resulting from anticipated lower unemployment and higher GDP.

MORTGAGE LOAN SALES AND SERVICI

MORTGAGE LOAN SALES AND SERVICING RIGHTS	9 Months Ended
	Sep. 30, 2021
Transfers and Servicing [Abstract]
LOAN SALES AND SECURITIZATIONS	MORTGAGE LOAN SALES AND SERVICING RIGHTS Residential Mortgage Portfolio 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, 2021 and 2020: Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Residential mortgage loans sold with servicing retained $ 2,298 $ 2,391 $ 7,302 $ 6,106 Pretax gains resulting from above loan sales (1) 80 98 274 196 (1) Recorded in mortgage banking income. The following table summarizes the changes in MSRs recorded using the fair value method for the three-month and nine-month periods ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Fair value, beginning of period $ 327 $ 172 $ 210 $ 7 Fair value election for servicing assets previously measured using the amortized method (1) — — — 205 Servicing assets obtained in acquisition — `` — 59 — New servicing assets created 31 30 103 70 Change in fair value during the period due to: Time decay (2) (4) (2) (11) (6) Payoffs (3) (17) (13) (50) (29) Changes in valuation inputs or assumptions (4) 1 4 27 (56) Fair value, end of period $ 338 $ 191 $ 338 $ 191 Weighted-average life (years) 7.0 6.4 7.0 6.4 (1) Prior to January 1, 2020, substantially all of Huntington’s MSR assets were recorded at amortized cost. (2) Represents decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns. (3) Represents decrease in value associated with loans that paid off during the period. (4) Represents change in value resulting primarily from market-driven changes in interest rates. MSRs do not trade in an active, open market with readily observable prices. Therefore, the fair value of MSRs is estimated using a discounted future cash flow model. Changes in the assumptions used may have a significant impact on the valuation of MSRs. MSR values are highly sensitive to movement 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. A summary of key assumptions and the sensitivity of the MSR value to changes in these assumptions at September 30, 2021, and December 31, 2020 follows: September 30, 2021 December 31, 2020 Decline in fair value due to Decline in fair value due to (dollar amounts in millions) Actual 10% 20% Actual 10% 20% Constant prepayment rate (annualized) 12.21 % $ (16) $ (30) 17.36 % $ (12) $ (23) Spread over forward interest rate swap rates 545 bps (7) (14) 519 bps (4) (8) Total servicing, late fees and other ancillary fees included in mortgage banking income was $22 million and $16 million for the three-month periods ended September 30, 2021 and 2020, respectively. For the nine-month periods ended September 30, 2021 and 2020, total servicing, late fees and other ancillary fees included in mortgage banking income was $57 million and $47 million, respectively. The unpaid principal balance of residential mortgage loans serviced for third parties was $30.6 billion and $23.5 billion at September 30, 2021 and December 31, 2020, respectively.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Disclosure	GOODWILL AND OTHER INTANGIBLE ASSETS Business segments are based on segment leadership structure, which reflects how segment performance is monitored and assessed. We have four major business segments: Consumer and Business Banking, Commercial Banking, Vehicle Finance, and Regional Banking and The Huntington Private Client Group (RBHPCG). The Treasury / Other function includes technology and operations, other unallocated assets, liabilities, revenue, and expense. A rollforward of goodwill by business segment for the first nine-month period of 2021 is presented in the table below. (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Balance, December 31, 2020 $ 1,393 $ 427 $ — $ 170 $ — $ 1,990 TCF acquisition 2,006 1,260 — 60 — 3,326 Balance, September 30, 2021 $ 3,399 $ 1,687 $ — $ 230 $ — $ 5,316 For additional information on the acquisition, refer to Note 2 “ Acquisition of TCF Financial Corporation ”. At September 30, 2021 and December 31, 2020, Huntington’s other intangible assets consisted of the following: (dollar amounts in millions) Gross Accumulated Net September 30, 2021 Core deposit intangible $ 389 $ (165) $ 224 Customer relationship 108 (77) 31 Total other intangible assets $ 497 $ (242) $ 255 December 31, 2020 Core deposit intangible $ 310 $ (150) $ 160 Customer relationship 101 (70) 31 Total other intangible assets $ 411 $ (220) $ 191 The estimated amortization expense of other intangible assets for the remainder of 2021 and the next five years is as follows: (dollar amounts in millions) Amortization Expense 2021 $ 14 2022 53 2023 49 2024 45 2025 42 2026 29

BORROWINGS

BORROWINGS	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
BORROWINGS	8. BORROWINGS Borrowings with original maturities of one year or less are classified as short-term and were comprised of the following at September 30, 2021 and December 31, 2020, respectively: (dollar amounts in millions) September 30, December 31, Federal funds purchased and securities sold under agreements to repurchase $ 401 $ 71 Other borrowings 34 112 Total short-term borrowings $ 435 $ 183 Huntington’s long-term debt consisted of the following at September 30, 2021 and December 31, 2020, respectively: (dollar amounts in millions) September 30, December 31, The Parent Company: Senior Notes $ 2,802 $ 3,635 Subordinated Notes 1,037 507 Total notes issued by the parent 3,839 4,142 The Bank: Senior Notes 2,451 3,533 Subordinated Notes 813 233 Total notes issued by the bank 3,264 3,766 FHLB Advances 216 3 Other 460 441 Total long-term debt $ 7,779 $ 8,352 As a result of the TCF acquisition, Huntington assumed long-term debt totaling $1.5 billion, of which a FHLB advance of $213 million and subordinated notes of $598 million remain outstanding at September 30, 2021. The assumed long-term FHLB advance has a maturity date in 2025 and carried interest rate of 1.03% at September 30, 2021. The assumed subordinated notes included $8 million of parent company obligations due in 2034 carrying variable interest rates based on three-month LIBOR plus 2.85% and $590 million of Bank obligations due in 2022 to 2030 carrying interest rates ranging from 0.64% to 3.75% outstanding at September 30, 2021. During the 2021 third quarter, Huntington issued $558 million of fixed-to-fixed rate subordinated notes at par (the “2036 Notes”). The fixed-to-fixed rate subordinated notes, maturing on August 15, 2036, bear an initial fixed interest rate of 2.487% per annum, payable semi-annually in arrears on February 15 and August 15, commencing on February 15, 2022. Commencing August 15, 2031 (the “Reset Date”), the interest rate will reset to an annual interest rate equal to the five-year U.S. Treasury Rate as of the day falling two business days prior to the Reset Date, plus 1.170%.

OTHER COMPREHENSIVE INCOME

OTHER COMPREHENSIVE INCOME	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
OTHER COMPREHENSIVE INCOME	OTHER COMPREHENSIVE INCOME The components of Huntington’s OCI for the three-month and nine-month periods ended September 30, 2021 and 2020, were as follows: Three Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ (112) $ 26 $ (86) Less: Reclassification adjustment for realized net losses (gains) included in net income 5 (1) 4 Net change in unrealized holding gains (losses) on available-for-sale securities (107) 25 (82) Net change in fair value on cash flow hedges (43) 14 (29) Foreign currency translation adjustment (1) (7) — (7) Net unrealized gains (losses) on net investment hedges 9 — 9 Translation adjustments, net of hedges (1) 2 — 2 Net change in pension and other post-retirement obligations 3 — 3 Total other comprehensive income $ (145) $ 39 $ (106) Three Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ — $ — $ — Less: Reclassification adjustment for realized net losses (gains) included in net income 6 (1) 5 Net change in unrealized gains (losses) on available-for-sale securities 6 (1) 5 Net change in fair value on cash flow hedges (52) 12 (40) Net change in pension and other post-retirement obligations 3 (1) 2 Total other comprehensive income $ (43) $ 10 $ (33) Nine Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ (311) $ 70 $ (241) Less: Reclassification adjustment for realized net losses (gains) included in net income 27 (6) 21 Net change in unrealized holding gains (losses) on available-for-sale securities (284) 64 (220) Net change in fair value on cash flow hedges (135) 33 (102) Foreign currency translation adjustment (1) (13) — (13) Net unrealized gains (losses) on net investment hedges 9 — 9 Translation adjustments, net of hedges (1) (4) — (4) Net change in pension and other post-retirement obligations 12 (3) 9 Total other comprehensive loss $ (411) $ 94 $ (317) Nine Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ 274 $ (61) $ 213 Less: Reclassification adjustment for realized net losses (gains) included in net income 35 (8) 27 Net change in unrealized holding gains (losses) on available-for-sale securities 309 (69) 240 Net change in fair value on cash flow hedges 358 (79) 279 Net change in pension and other post-retirement obligations (2) (8) 2 (6) Total other comprehensive income $ 659 $ (146) $ 513 (1) Foreign investments are deemed to be permanent in nature and, therefore, Huntington does not provide for taxes on foreign currency translation adjustments. (2) Includes a settlement gain recognized in other noninterest income on the Unaudited Condensed Consolidated Statements of Income. Activity in accumulated OCI for the three-month and nine-month periods ended September 30, 2021 and 2020, were as follows: (dollar amounts in millions) Unrealized gains (losses) on debt securities (1) Change in fair value related to cash flow hedges Translation adjustments, net of hedges Unrealized gains (losses) for pension and other post- retirement obligations (2) Total Three Months Ended September 30, 2021 Balance, beginning of period $ 50 $ 184 $ (6) $ (247) $ (19) Other comprehensive income (loss) before reclassifications (86) (29) 2 — (113) Amounts reclassified from accumulated OCI to earnings 4 — — 3 7 Period change (82) (29) 2 3 (106) Balance, end of period $ (32) $ 155 $ (4) $ (244) $ (125) Three Months Ended September 30, 2020 Balance, beginning of period $ 207 $ 342 $ — $ (259) $ 290 Other comprehensive income before reclassifications — (40) — — (40) Amounts reclassified from accumulated OCI to earnings 5 — — 2 7 Period change 5 (40) — 2 (33) Balance, end of period $ 212 $ 302 $ — $ (257) $ 257 (dollar amounts in millions) Unrealized gains (losses) on debt securities (1) Change in fair value related to cash flow hedges Translation adjustments, net of hedges Unrealized gains (losses) for pension and other post- retirement obligations (2) Total Nine Months Ended September 30, 2021 Balance, beginning of period $ 188 $ 257 $ — $ (253) $ 192 Other comprehensive loss before reclassifications (241) (102) (4) — (347) Amounts reclassified from accumulated OCI to earnings 21 — — 9 30 Period change (220) (102) (4) 9 (317) Balance, end of period $ (32) $ 155 $ (4) $ (244) $ (125) Nine Months Ended September 30, 2020 Balance, beginning of period $ (28) $ 23 $ — $ (251) $ (256) Other comprehensive income before reclassifications 213 279 — — 492 Amounts reclassified from accumulated OCI to earnings 27 — — (6) 21 Period change 240 279 — (6) 513 Balance, end of period $ 212 $ 302 $ — $ (257) $ 257 (1) AOCI amounts at September 30, 2021 and September 30, 2020 include $41 million and $74 million, respectively, of net unrealized losses on securities transferred from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The net unrealized losses will be recognized in earnings over the remaining life of the security using the effective interest method.

SHAREHOLDERS' EQUITY

SHAREHOLDERS' EQUITY	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
SHAREHOLDERS' EQUITY	SHAREHOLDERS’ EQUITY Preferred Stock The following is a summary of Huntington’s non-cumulative, non-voting, perpetual preferred stock outstanding as of September 30, 2021. (dollar amounts in millions) Series Issuance Date Total Shares Outstanding Amount Dividend Rate Earliest Redemption Date Series B 12/28/2011 35,500 $ 23 3-mo. LIBOR + 270 bps 1/15/2017 Series C 8/16/2016 100,000 100 5.875 % 10/15/2021 Series E 2/27/2018 5,000 495 5.700 4/15/2023 Series F 5/27/2020 5,000 494 5.625 7/15/2030 Series G 8/3/2020 5,000 494 4.450 10/15/2027 Series H 2/2/2021 500,000 486 4.500 4/15/2026 Series I 6/9/2021 7,000 175 5.700 12/01/2022 Total 657,500 $ 2,267 Series B, C and H of preferred stock have a liquidation value and redemption price per share of $1,000, plus any declared and unpaid dividends. Series E, F, G, and I stock have a liquidation value and redemption price per share of $100,000, plus any declared and unpaid dividends. All preferred stock has no stated maturity and redemption is solely at Huntington’s option. Under current rules, any redemption of the preferred stock is subject to prior approval of the FRB. On July 15, 2021, all 24,000,000 outstanding depositary shares, each representing a 1/40th interest in a share of Huntington’s 6.250% Series D Non-Cumulative Perpetual Preferred Stock, par value $0.01 per share, were redeemed. The depositary shares were redeemed at a price of $25.00 per depositary share (equivalent to $1,000 per share of Series D Preferred Stock) plus declared and unpaid dividends of $0.390625 per depositary share (equivalent to $15.625 per share of Series D Preferred Stock) for the period beginning on April 15, 2021 to, but not including, July 15, 2021. All dividends on the shares of Series D Preferred Stock ceased to accrue. On October 15, 2021, all 4,000,000 outstanding depositary shares, each representing a 1/40th interest in a share of Huntington’s 5.875% Series C Non-Cumulative Perpetual Preferred Stock, par value $0.01 per share, were redeemed. The depositary shares were redeemed at a price of $25.00 per depositary share (equivalent of $1,000 per share of Series C Preferred Stock) plus declared unpaid dividends of $0.36725 per depositary share (equivalent to $14.69 per share of Series C Preferred Stock) for the period beginning on July 15, 2021 to, but not including, October 15, 2021. All dividends on the shares of Series C Preferred Stock will cease to accrue. Preferred Series I Stock issued and outstanding On June 9, 2021, each share of TCF Financial Corporation 5.70% Series C Non-Cumulative Perpetual Preferred Stock, $0.01 par value per share, outstanding immediately prior to the acquisition of TCF Financial Corporation was converted into the right to receive a share of the newly created Huntington 5.70% Series I Non-Cumulative Perpetual Preferred Stock, par value $0.01 per share. The following table presents the dividends declared for each series of Preferred shares for the three-month and nine-month periods ended September 30, 2021 and 2020: Three Months Ended September 30, Nine months ended September 30, (amounts in millions, except per share data) 2021 2020 2021 2020 Cash Dividend Declared Per Share Cash Dividend Declared Per Share Cash Dividend Declared Per Share Cash Dividend Declared Per Share Preferred Series Amount ($) Amount ($) Amount ($) Amount ($) Series B $ 7.07 $ — $ 7.44 $ — $ 21.63 $ — $ 28.56 $ (1) Series C 14.69 (1) 14.69 (1) 44.07 (4) 44.07 (4) Series D — — 15.63 (10) 31.25 (18) 46.88 (29) Series E 1,425.00 (7) 1,425.00 (7) 4,275.00 (21) 4,275.00 (21) Series F 1,406.25 (7) 2,062.50 (10) 4,218.75 (21) 2,062.50 (10) Series G 1,112.50 (6) — — 3,337.50 (18) — — Series H 11.25 (6) — — 30.75 (16) — — Series I 356.25 (2) — — 712.50 (5) — — Total $ (29) $ (28) $ (103) $ (65) Change in Common Shares Authorized During the second quarter of 2021, Huntington amended its charter to increase the number of authorized shares of common stock from 1.5 billion shares to 2.25 billion shares. Share Repurchases On July 21, 2021, the Board authorized the repurchase of up to $800 million of common shares over the next four quarters. Purchases of common stock under the authorization may include open market purchases, privately negotiated transactions, and accelerated share repurchase programs. During the 2021 third quarter, Huntington repurchased a total of $500 million common stock, representing 33.4 million common shares, at a weighted average price of $14.96. Treasury shares Treasury shares includes shares held for deferred compensation plans, at cost, of $79 million at September 30, 2021 and $59 million at December 31, 2020. Non-controlling Interest in Subsidiaries Through the acquisition of TCF, Huntington acquired a joint venture with The Toro Company ("Toro") called Red Iron Acceptance, LLC ("Red Iron"). Red Iron provides U.S. distributors and dealers and select Canadian distributors of the Toro and Exmark branded products with sources of financing. Huntington and Toro maintain a 55% and 45% ownership interest, respectively, in Red Iron. As Huntington has a controlling financial interest in Red Iron, its financial results are consolidated in Huntington's financial statements. Toro's interest is reported as a non-controlling interest within equity.

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
	Sep. 30, 2021
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 and impact of preferred stock redemption) 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, and distributions from deferred compensation plans. Potentially dilutive common shares are excluded from the computation of diluted earnings per share in periods in which the effect would be antidilutive. The calculation of basic and diluted earnings per share for the three-month and nine-month periods ended September 30, 2021 and 2020 was as follows: Three Months Ended Nine Months Ended (dollar amounts in millions, except per share data, share count in thousands) 2021 2020 2021 2020 Basic earnings per common share: Net income attributable to Huntington Bancshares Inc $ 377 $ 303 $ 894 $ 501 Preferred stock dividends 29 28 103 65 Impact of preferred stock redemption 15 — 15 — Net income available to common shareholders $ 333 $ 275 $ 776 $ 436 Average common shares issued and outstanding 1,462,736 1,017,253 1,201,763 1,017,052 Basic earnings per common share $ 0.23 $ 0.27 $ 0.65 $ 0.43 Diluted earnings per common share: Dilutive potential common shares: Stock options and restricted stock units and awards 17,536 9,005 17,623 9,628 Shares held in deferred compensation plans 7,063 5,202 6,042 4,893 Dilutive potential common shares 24,599 14,207 23,665 14,521 Total diluted average common shares issued and outstanding 1,487,335 1,031,460 1,225,428 1,031,573 Diluted earnings per common share $ 0.22 $ 0.27 $ 0.63 $ 0.42 Anti-dilutive awards (1) 4,609 13,954 4,410 12,420 (1) Reflects the total number of shares related to outstanding options and awards that have been excluded from the computation of diluted earnings per share because the impact would have been anti-dilutive.

NONINTEREST INCOME

NONINTEREST INCOME	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
NONINTEREST INCOME	NONINTEREST INCOME Huntington earns a variety of revenue including interest and fees from customers as well as revenues from non-customers. Certain sources of revenue are recognized within interest or fee income and are outside of the scope of ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”). Other sources of revenue fall within the scope of ASC 606 and are generally recognized within noninterest income. These revenues are included within various sections of the Unaudited Condensed Consolidated Financial Statements. The following table shows Huntington’s total noninterest income segregated between contracts with customers within the scope of ASC 606 and those within the scope of other GAAP Topics. (dollar amounts in millions) Three Months Ended September 30, Nine Months Ended September 30, Noninterest income 2021 2020 2021 2020 Noninterest income from contracts with customers $ 315 $ 224 $ 794 $ 652 Noninterest income within the scope of other GAAP topics 220 206 580 530 Total noninterest income $ 535 $ 430 $ 1,374 $ 1,182 The following table illustrates the disaggregation by operating segment and major revenue stream and reconciles disaggregated revenue to segment revenue presented in Note 17 “ Segment Reporting ”. Three Months Ended September 30, 2021 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 89 $ 23 $ 1 $ 1 $ — $ 114 Card and payment processing income 85 6 — — — 91 Trust and investment management services 17 — — 44 — 61 Insurance income 12 2 — 11 — 25 Other noninterest income 8 5 1 2 8 24 Net revenue from contracts with customers $ 211 $ 36 $ 2 $ 58 $ 8 $ 315 Noninterest income within the scope of other GAAP topics 91 114 2 — 13 220 Total noninterest income $ 302 $ 150 $ 4 $ 58 $ 21 $ 535 Three Months Ended September 30, 2020 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 54 $ 19 $ 2 $ 1 $ — $ 76 Card and payment processing income 59 4 — — — 63 Trust and investment management services 13 1 — 34 — 48 Insurance income 12 2 — 11 (1) 24 Other noninterest income 6 6 1 3 (3) 13 Net revenue from contracts with customers $ 144 $ 32 $ 3 $ 49 $ (4) $ 224 Noninterest income within the scope of other GAAP topics 130 58 (1) (2) 21 206 Total noninterest income $ 274 $ 90 $ 2 $ 47 $ 17 $ 430 Nine Months Ended September 30, 2021 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 201 $ 64 $ 4 $ 2 $ — $ 271 Card and payment processing income 211 14 — — — 225 Trust and investment management services 45 1 — 122 — 168 Insurance income 38 5 — 33 1 77 Other noninterest income 19 14 2 7 11 53 Net revenue from contracts with customers $ 514 $ 98 $ 6 $ 164 $ 12 $ 794 Noninterest income within the scope of other GAAP topics 266 255 3 1 55 580 Total noninterest income $ 780 $ 353 $ 9 $ 165 $ 67 $ 1,374 Nine Months Ended September 30, 2020 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 161 $ 54 $ 4 $ 3 $ — $ 222 Card and payment processing income 163 11 — — — 174 Trust and investment management services 33 3 — 104 — 140 Insurance income 32 5 — 34 1 72 Other noninterest income 18 14 2 11 (1) 44 Net revenue from contracts with customers $ 407 $ 87 $ 6 $ 152 $ — $ 652 Noninterest income within the scope of other GAAP topics 297 174 1 (1) 59 530 Total noninterest income $ 704 $ 261 $ 7 $ 151 $ 59 $ 1,182

FAIR VALUES OF ASSETS AND LIABI

FAIR VALUES OF ASSETS AND LIABILITIES	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
FAIR VALUES OF ASSETS AND LIABILITIES	FAIR VALUES OF ASSETS AND LIABILITIES See Note 20 “Fair Value of Assets and Liabilities” to the Consolidated Financial Statements appearing in Huntington’s 2020 Annual Report on Form 10-K for a description of the valuation methodologies used for instruments measured at fair value. 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, 2021 and 2020. 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, 2021 and December 31, 2020 are summarized in the following tables: Fair Value Measurements at Reporting Date Using Netting Adjustments (1) September 30, 2021 (dollar amounts in millions) Level 1 Level 2 Level 3 Assets Trading account securities: Municipal securities $ — $ 77 $ — $ — $ 77 — 77 — — 77 Available-for-sale securities: U.S. Treasury securities 5 — — — 5 Residential CMOs — 3,734 — — 3,734 Residential MBS — 14,337 — — 14,337 Commercial MBS — 1,498 — — 1,498 Other agencies — 264 — — 264 Municipal securities — 52 3,582 — 3,634 Private-label CMO — 102 18 — 120 Asset-backed securities — 250 35 — 285 Corporate debt — 1,773 — — 1,773 Other securities/sovereign debt — 4 — — 4 5 22,014 3,635 — 25,654 Other securities 62 24 — — 86 Loans held for sale — 1,297 — — 1,297 Loans held for investment — 119 20 — 139 MSRs — — 338 — 338 Other assets: Derivative assets — 1,567 19 (686) 900 Assets held in trust for deferred compensation plans 151 — — — 151 Liabilities Other liabilities: Derivative liabilities — 1,056 7 (813) 250 Fair Value Measurements at Reporting Date Using Netting Adjustments (1) December 31, 2020 (dollar amounts in millions) Level 1 Level 2 Level 3 Assets Trading account securities: Municipal securities $ — $ 62 $ — $ — $ 62 Available-for-sale securities: U.S. Treasury securities 5 — — — 5 Residential CMOs — 3,666 — — 3,666 Residential MBS — 7,935 — — 7,935 Commercial MBS — 1,163 — — 1,163 Other agencies — 62 — — 62 Municipal securities — 53 2,951 — 3,004 Private-label CMO — — 9 — 9 Asset-backed securities — 182 10 — 192 Corporate debt — 445 — — 445 Other securities/sovereign debt — 4 — — 4 5 13,510 2,970 — 16,485 Other securities 59 — — — 59 Loans held for sale — 1,198 — — 1,198 Loans held for investment — 71 23 — 94 MSRs — — 210 — 210 Other assets: Derivative assets — 1,903 43 (889) 1,057 Assets held in trust for deferred compensation plans 73 — — — 73 Liabilities Other liabilities: Derivative liabilities — 1,031 2 (917) 116 (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 following tables present a rollforward of the balance sheet amounts for the three-month and nine-month periods ended September 30, 2021 and 2020, 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 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- Asset-backed securities Opening balance $ 327 $ 23 $ 3,609 $ 18 $ 46 $ 21 Transfers out of Level 3 (1) — (39) — — — — Total gains/losses for the period: Included in earnings 1 28 (1) — — — Included in OCI — — (8) — — — Purchases/originations 31 — 260 — — — Sales — — (17) — — — Repayments — — — — — (1) Settlements (21) — (261) — (11) — Closing balance $ 338 $ 12 $ 3,582 $ 18 $ 35 $ 20 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 1 $ (12) $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — (10) — — — Level 3 Fair Value Measurements MSRs Derivative instruments Available-for-sale securities Loans held for investment (dollar amounts in millions) Municipal securities Private- label CMO Asset-backed securities Opening balance $ 172 $ 40 $ 3,102 $ 5 $ 56 $ 25 Transfers out of Level 3 (1) — (64) — — — — Total gains/losses for the period: Included in earnings 19 72 (1) — — — Included in OCI — — 60 — — — Purchases/originations — — 154 — — — Repayments — — — — — (1) Settlements — — (226) — (7) — Closing balance $ 191 $ 48 $ 3,089 $ 5 $ 49 $ 24 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 18 $ 8 $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — 62 — — — Level 3 Fair Value Measurements Nine Months Ended September 30, 2021 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- label CMO Asset-backed securities Opening balance $ 210 $ 41 $ 2,951 $ 9 $ 10 $ 23 Transfers out of Level 3 (1) — (109) — — — — Total gains/losses for the period: Included in earnings 27 73 (1) — — — Included in OCI — — (13) — — — Purchases/originations/acquisitions 162 7 1,613 8 75 — Sales — — (369) — — — Repayments — — — — — (3) Settlements (61) — (599) 1 (50) — Closing balance $ 338 $ 12 $ 3,582 $ 18 $ 35 $ 20 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 27 $ (33) $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — (14) — — — Level 3 Fair Value Measurements Nine Months Ended September 30, 2020 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- label CMO Asset- backed securities Opening balance $ 7 $ 6 $ 2,999 $ 2 $ 48 $ 26 Fair value election for servicing assets previously measured using the amortized method 205 — — — — — Transfers out of Level 3 (1) — (139) — — — — Total gains/losses for the period: Included in earnings (21) 181 (2) — — — Included in OCI — — 61 — — — Purchases/originations — — 491 3 28 — Repayments — — — — — (2) Settlements — — (460) — (27) — Closing balance $ 191 $ 48 $ 3,089 $ 5 $ 49 $ 24 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ (22) $ 42 $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — 64 — — — — (1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that are transferred to loans held for sale, which is classified as Level 2. The following tables 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, 2021 and 2020: Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 1 $ 28 $ — Interest and fee income — — (1) Total $ 1 $ 28 $ (1) Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 19 $ 72 $ — Interest and fee income — — (1) Total $ 19 $ 72 $ (1) Level 3 Fair Value Measurements (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 27 $ 73 $ — Interest and fee income — — (1) Total $ 27 $ 73 $ (1) Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ (21) $ 181 $ — Interest and fee income — — (2) Total $ (21) $ 181 $ (2) Assets and liabilities under the fair value option The following tables present the fair value and aggregate principal balance of certain assets and liabilities under the fair value option: September 30, 2021 (dollar amounts in millions) Total Loans Loans that are 90 or more days past due Assets Fair value carrying amount Aggregate unpaid principal Difference Fair value carrying amount Aggregate unpaid principal Difference Loans held for sale $ 1,297 $ 1,260 $ 37 $ — $ — $ — Loans held for investment 139 143 (4) 3 4 (1) December 31, 2020 (dollar amounts in millions) Total Loans Loans that are 90 or more days past due Assets Fair value carrying amount Aggregate unpaid principal Difference Fair value carrying amount Aggregate unpaid principal Difference Loans held for sale $ 1,198 $ 1,134 $ 64 $ 2 $ 2 $ — Loans held for investment 94 99 (5) 7 8 (1) The following table present the net gains (losses) from fair value changes for the three-month and nine-month periods ended September 30, 2021 and 2020. Net gains (losses) from fair value changes (dollar amounts in millions) Three Months Ended September 30, Nine Months Ended September 30, Assets 2021 2020 2021 2020 Loans held for sale (1) $ (4) $ 13 $ (30) $ 35 (1) The net gains (losses) from fair value changes are included in Mortgage banking income on the Unaudited Condensed Consolidated Statements of Income. 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. The amounts presented represent the fair value on the various measurement dates throughout the period. The gains (losses) represent the amounts recorded during the period regardless of whether the asset is still held at period end. The amounts measured at fair value on a nonrecurring basis at September 30, 2021 were as follows: Fair Value Measurements Using Total (dollar amounts in millions) Fair Value Quoted Prices Significant Significant Collateral-dependent loans $ 18 $ — $ — $ 18 $ (2) Loans held for sale — — — — 1 Huntington records nonrecurring adjustments of collateral-dependent loans held for investment. 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. Periodically, in cases where the carrying value exceeds the fair value of the collateral less cost to sell, an impairment charge is recognized in the form of a charge-off. 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, 2021 and December 31, 2020: Quantitative Information about Level 3 Fair Value Measurements at September 30, 2021 (1) (dollar amounts in millions) Fair Value Valuation Technique Significant Unobservable Input Range Weighted Average Measured at fair value on a recurring basis: MSRs $ 338 Discounted cash flow Constant prepayment rate 8 % - 21% 12 % Spread over forward interest rate swap rates 3 % - 11% 5 % Derivative assets 19 Consensus Pricing Net market price (4) % - 10% 1 % Estimated pull through % 6 % - 100% 90 % Municipal securities 3,582 Discounted cash flow Discount rate — % - 2% 1 % Asset-backed securities 35 Cumulative default — % - 64% 5 % Loss given default 5 % - 90% 24 % Measured at fair value on a nonrecurring basis: Collateral-dependent loans 18 Appraisal value N/A N/A Quantitative Information about Level 3 Fair Value Measurements at December 31, 2020 (1) (dollar amounts in millions) Fair Value Valuation Technique Significant Unobservable Input Range Weighted Average Measured at fair value on a recurring basis: MSRs $ 210 Discounted cash flow Constant prepayment rate 8 % - 24% 17 % Spread over forward interest rate swap rates 4 % - 11% 5 % Derivative assets 43 Consensus Pricing Net market price (4) % - 11% 3 % Estimated pull through % 1 % - 100% 88 % Municipal securities 2,951 Discounted cash flow Discount rate — % 1% 1 % Asset-backed securities 10 Cumulative default — % 39% 4 % Loss given default 5 % 80% 25 % Measured at fair value on a nonrecurring basis: Collateral-dependent loans 144 Appraisal value N/A NA (1) Certain disclosures related to quantitative level 3 fair value measurements do not include those deemed to be immaterial. 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. 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 at September 30, 2021 and December 31, 2020: September 30, 2021 (dollar amounts in millions) Amortized Cost Lower of Cost or Market Fair Value or Fair Value Option Total Carrying Amount Estimated Fair Value Financial Assets Cash and short-term assets $ 10,188 $ — $ — $ 10,188 $ 10,188 Trading account securities — — 77 77 77 Available-for-sale securities — — 25,654 25,654 25,654 Held-to-maturity securities 12,455 — — 12,455 12,619 Other securities 563 — 86 649 649 Loans held for sale — 38 1,297 1,335 1,335 Net loans and leases (1) 108,321 — 139 108,460 108,385 Derivative assets — — 900 900 900 Assets held in trust for deferred compensation plans — — 151 151 151 Financial Liabilities Deposits 141,898 — — 141,898 142,261 Short-term borrowings 435 — — 435 435 Long-term debt 7,779 — — 7,779 7,908 Derivative liabilities — — 250 250 250 December 31, 2020 (dollar amounts in millions) Amortized Cost Lower of Cost or Market Fair Value or Fair Value Option Total Carrying Amount Estimated Fair Value Financial Assets Cash and short-term assets $ 6,712 $ — $ — $ 6,712 $ 6,712 Trading account securities — — 62 62 62 Available-for-sale securities — — 16,485 16,485 16,485 Held-to-maturity securities 8,861 — — 8,861 9,255 Other securities 359 — 59 418 418 Loans held for sale — 77 1,198 1,275 1,275 Net loans and leases (1) 79,700 — 94 79,794 80,477 Derivative assets — — 1,057 1,057 1,057 Assets held in trust for deferred compensation plans — — 73 73 73 Financial Liabilities Deposits 98,948 — — 98,948 99,021 Short-term borrowings 183 — — 183 183 Long-term debt 8,352 — — 8,352 8,568 Derivative liabilities — — 116 116 116 (1) Includes collateral-dependent loans. The following table presents the level in the fair value hierarchy for the estimated fair values at September 30, 2021 and December 31, 2020: Estimated Fair Value Measurements at Reporting Date Using Netting Adjustments (1) September 30, 2021 (dollar amounts in millions) Level 1 Level 2 Level 3 Financial Assets Trading account securities $ — $ 77 $ — $ 77 Available-for-sale securities 5 22,014 3,635 25,654 Held-to-maturity securities — 12,619 — 12,619 Other securities (2) 62 24 — 86 Loans held for sale — 1,297 38 1,335 Net loans and direct financing leases — 119 108,266 108,385 Derivative assets — 1,567 19 $ (686) 900 Financial Liabilities Deposits — 137,142 5,119 142,261 Short-term borrowings — 435 — 435 Long-term debt — 7,147 761 7,908 Derivative liabilities — 1,056 7 (813) 250 Estimated Fair Value Measurements at Reporting Date Using Netting Adjustments (1) December 31, 2020 (dollar amounts in millions) Level 1 Level 2 Level 3 Financial Assets Trading account securities $ — $ 62 $ — $ 62 Available-for-sale securities 5 13,510 2,970 16,485 Held-to-maturity securities — 9,255 — 9,255 Other securities (2) 59 — — 59 Loans held for sale — 1,198 77 1,275 Net loans and direct financing leases — 71 80,406 80,477 Derivative assets — 1,903 43 $ (889) 1,057 Financial Liabilities Deposits — 96,656 2,365 99,021 Short-term borrowings — 183 — 183 Long-term debt — 7,999 569 8,568 Derivative liabilities — 1,031 2 (917) 116 (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. (2) Excludes securities without readily determinable fair values. 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, interest-bearing deposits at FRB, 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.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2021
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 other assets or other liabilities, respectively) and measured at fair value. Derivative financial instruments can be designated as accounting hedges under GAAP. Designating a derivative as an accounting hedge allows Huntington to recognize gains and losses on the hedging instruments in the income statement line item where the gains and losses on the hedged item are recognized. Gains and losses on derivatives that are not designated in an effective hedge relationship under GAAP immediately impact earnings within the period they occur. The following table presents the fair values and notional values of all derivative instruments included in the Unaudited Condensed Consolidated Balance Sheets at September 30, 2021 and December 31, 2020. Amounts in the table below are presented gross without the impact of any net collateral arrangements. September 30, 2021 December 31, 2020 (dollar amounts in millions) Notional Value Asset Liability Notional Value Asset Liability Derivatives designated as Hedging Instruments Interest rate contracts $ 20,053 $ 413 $ 12 $ 27,056 $ 719 $ 51 Foreign exchange contracts 209 — — — — — Derivatives not designated as Hedging Instruments Interest rate contracts 54,089 772 665 44,495 1,074 828 Foreign exchange contracts 3,568 35 30 2,718 46 47 Commodities contracts 1,255 353 351 1,952 107 103 Equity contracts 705 13 5 517 — 4 Total Contracts $ 79,879 $ 1,586 $ 1,063 $ 76,738 $ 1,946 $ 1,033 The following table presents the amount of gain or loss recognized in income for derivatives not designated as hedging instruments under ASC Subtopic 815-10 in the Unaudited Condensed Consolidated Income Statement for the three-month and nine-month periods ended September 30, 2021 and 2020, respectively. Location of Gain or (Loss) Recognized in Income on Derivative Amount of Gain or (Loss) Recognized in Income on Derivative Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Interest rate contracts: Customer Capital markets fees $ 13 $ 10 $ 37 $ 39 Mortgage banking Mortgage banking income 5 47 (24) 109 Interest rate floors Interest and fee income on loans and leases (4) — (8) — Interest rate caps Interest expense on long-term debt — — 89 — Foreign exchange contracts Capital markets fees 9 7 22 18 Commodities contracts Capital markets fees (1) — (1) 2 Equity contracts Other noninterest expense (2) (1) (6) (3) Total $ 20 $ 63 $ 109 $ 165 Derivatives used in asset and liability management activities Huntington engages in balance sheet hedging activity, principally for asset and liability management purposes. Balance sheet hedging activity is generally arranged to receive hedge accounting treatment that can be classified as either fair value or cash flow hedges. Fair value hedges are executed to hedge changes in fair value of outstanding fixed-rate debt and investment securities caused by fluctuations in market interest rates. Cash flow hedges are executed to modify interest rate characteristics of designated commercial loans in order to reduce the impact of changes in future cash flows due to market interest rate changes. The following table presents the gross notional values of derivatives used in Huntington’s asset and liability management activities at September 30, 2021 and December 31, 2020, identified by the underlying interest rate-sensitive instruments. September 30, 2021 (dollar amounts in millions) Fair Value Hedges Cash Flow Hedges Economic Hedges Total Instruments associated with: Investment securities $ 7,372 $ — $ — $ 7,372 Loans — 7,925 271 8,196 Long-term debt 4,756 — — 4,756 Total notional value at September 30, 2021 $ 12,128 $ 7,925 $ 271 $ 20,324 December 31, 2020 (dollar amounts in millions) Fair Value Hedges Cash Flow Hedges Economic Hedges Total Instruments associated with: Investment securities $ 3,484 $ — $ — $ 3,484 Loans — 17,375 1,271 18,646 Long-term debt 6,197 — 5,000 11,197 Total notional value at December 31, 2020 $ 9,681 $ 17,375 $ 6,271 $ 33,327 These derivative financial instruments were entered into for the purpose of managing the interest rate risk of assets and liabilities. Net amounts receivable or payable on contracts hedging either interest earning assets or interest bearing liabilities were accrued as an adjustment to either interest income or interest expense. Adjustments to interest income were also recorded for the amounts related to the amortization of floors and forward-starting floors that were excluded from the hedge effectiveness, changes in the fair value of economic hedges, as well as the amounts related to terminated hedges reclassified from AOCI. The net amounts resulted in an increase to net interest income of $61 million and $82 million for the three-month periods ended September 30, 2021, and 2020, respectively. For the nine-month periods ended September 30, 2021, and 2020, the net amounts resulted in an increase to net interest income of $291 million and $151 million, respectively. Fair Value Hedges The changes in fair value of the fair value hedges are recorded through earnings and offset against changes in the fair value of the hedged item. Huntington has designated $7.0 billion of interest rate swaps as fair value hedges of fixed-rate investment securities using the last-of-layer method. This approach allows the Company to designate as the hedged item a stated amount of the assets that are not expected to be affected by prepayments, defaults and other factors affecting the timing and amount of cash flows. The fair value basis adjustment on our hedged mortgage-backed securities is included in available-for-sale securities on our Unaudited Condensed Consolidated Statements of Financial Condition. Huntington has also designated $0.4 billion of interest rate swaps as fair value hedges of fixed-rate corporate bonds. 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, 2021 and 2020. Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Interest rate contracts Change in fair value of interest rate swaps hedging investment securities (1) $ 2 $ — $ 39 $ (1) Change in fair value of hedged investment securities (1) — — (40) 1 Change in fair value of interest rate swaps hedging long-term debt (2) (22) (36) (95) 159 Change in fair value of hedged long term debt (2) 22 35 96 (160) (1) Recognized in Interest income—available-for-sale securities—taxable in the Unaudited Condensed Consolidated Statements of Income (2) Recognized in Interest expense—long-term debt in the Unaudited Condensed Consolidated Statements of Income . As of September 30, 2021, and December 31, 2020, the following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items (dollar amounts in millions) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Assets Investment securities (1) $ 17,630 $ 6,637 $ 2 $ 3 Liabilities Long-term debt 4,882 6,383 135 232 (1) Amounts include the amortized cost basis of closed portfolios used to designate hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. As of September 30, 2021, the amortized cost basis of the closed portfolios used in these hedging relationships was $17.2 billion, the cumulative basis adjustments associated with these hedging relationships was $1 million, and the amounts of the designated hedging instruments were $7.0 billion. The cumulative amount of fair value hedging adjustments remaining for any hedged assets and liabilities for which hedge accounting has been discontinued was $(35) million and $(62) million at September 30, 2021 and December 31, 2020, respectively. Cash Flow Hedges At September 30, 2021, Huntington has $7.9 billion of interest rate floors, floor spreads and swaps. These are designated as cash flow hedges for variable rate commercial loans indexed to LIBOR. The change in the fair value of a derivative instrument designated as a cash flow hedge is initially recognized in OCI and is reclassified into income when the hedged item impacts earnings. The initial premium paid for the interest rate floor contracts represents the time value of the contracts and is not included in the measurement of hedge effectiveness. Any change in fair value related to time value is recognized in OCI. The initial premium paid is amortized on a straight line basis as a reduction to interest income over the contractual life of these contracts. Gains and (losses) on interest rate floors, floor spreads, and swaps recognized in other comprehensive income were $(29) million and $(40) million for the three-month periods ended September 30, 2021 and 2020, respectively. For the nine-month periods ended September 30, 2021 and 2020, gains and losses on interest rate floors and swaps recognized in other comprehensive income were $(102) million and $279 million, respectively. Net investment Hedges Huntington has entered into forward foreign exchange contracts to hedge the value of the Company’s investments in non-U.S. dollar functional currency entities. The total notional amount of forward foreign exchange contracts at September 30, 2021 was $209 million. Derivatives used in mortgage banking activities Mortgage loan origination hedging activity Huntington’s mortgage origination hedging activity is related to economically hedging Huntington’s 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. Forward commitments to sell economically hedge the possible loss on interest rate lock commitments due to interest rate change. The net asset position of these derivatives at September 30, 2021 and December 31, 2020 were $34 million and $26 million, respectively. At September 30, 2021 and December 31, 2020, Huntington had commitments to sell residential real estate loans of $2.7 billion and $2.9 billion, respectively. These contracts mature in less than one year. 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, TBA securities, Treasury futures contracts, interest rate swaps, and options on interest rate swaps. The notional value of the derivative financial instruments, the corresponding net asset (liability) position recognized in other assets and/or other liabilities, and net trading gains (losses) related to MSR hedging activity is summarized in the following table: (dollar amounts in millions) September 30, December 31, Notional value $ 1,153 $ 1,170 Trading assets 17 43 Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Trading gains $ (4) $ (1) $ (28) $ 61 MSR hedging trading assets and liabilities are included in other assets and other liabilities, respectively, in the Unaudited Condensed Balance Sheets. Trading gains (losses) are included in mortgage banking income in the Unaudited Condensed Consolidated Statement 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 enters 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 or price 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 these transactions. The net fair values of these derivative financial instruments, for which the gross amounts are included in other assets or other liabilities at both September 30, 2021 and December 31, 2020, were $53 million and $70 million, respectively. The total notional values of derivative financial instruments used by Huntington on behalf of customers, including offsetting derivatives, were $53 billion and $37 billion at September 30, 2021 and December 31, 2020, respectively. Huntington’s credit risk from customer derivatives was $787 million and $882 million at the same dates, respectively. 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 13 “ Fair Values of Assets and Liabilities ”. 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 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 with customer counterparties. In addition to the customer derivative credit exposure, aggregate credit risk associated with broker-dealer and bank derivative transactions, net of collateral that has been pledged by the counterparty, was $113 million and $175 million at September 30, 2021 and December 31, 2020, respectively. The credit risk associated with derivatives is calculated after considering master netting agreements. At September 30, 2021, Huntington pledged $486 million of investment securities and cash collateral to counterparties, while other counterparties pledged $264 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, 2021 and December 31, 2020. Offsetting of Financial Assets and Derivative Assets Gross amounts Net amounts of Gross amounts not offset in the (dollar amounts in millions) Gross amounts of recognized assets Financial instruments Cash collateral received Net amount September 30, 2021 $ 1,586 $ (686) $ 900 $ (81) $ (61) $ 758 December 31, 2020 1,946 (889) 1,057 (112) (142) 803 Offsetting of Financial Liabilities and Derivative Liabilities Gross amounts offset in the unaudited condensed consolidated balance sheets Net amounts of liabilities presented in the unaudited condensed consolidated balance sheets Gross amounts not offset in the unaudited condensed consolidated balance sheets (dollar amounts in millions) Gross amounts of recognized liabilities Financial instruments Cash collateral delivered Net amount September 30, 2021 $ 1,063 $ (813) $ 250 $ — $ (225) $ 25 December 31, 2020 1,033 (917) 116 (9) (105) 2

VIEs

VIEs	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
VIEs	VIEs 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 in, but is not the primary beneficiary, of the VIE at September 30, 2021, and December 31, 2020: September 30, 2021 (dollar amounts in millions) Total Assets Total Liabilities Maximum Exposure to Loss Trust Preferred Securities $ 14 $ 256 $ — Affordable Housing Tax Credit Partnerships 1,436 774 1,436 Other Investments 426 145 426 Total $ 1,876 $ 1,175 $ 1,862 December 31, 2020 (dollar amounts in millions) Total Assets Total Liabilities Maximum Exposure to Loss Trust Preferred Securities $ 14 $ 252 $ — Affordable Housing Tax Credit Partnerships 956 500 956 Other Investments 308 72 308 Total $ 1,278 $ 824 $ 1,264 Trust-Preferred Securities Huntington has certain wholly-owned trusts whose assets, liabilities, equity, income, and expenses are not included within 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 Sheet as long-term debt. The trust securities are the obligations of the trusts, and as such, are not consolidated within Huntington’s Unaudited Condensed Consolidated Financial Statements. A list of trust preferred securities outstanding at September 30, 2021 follows: (dollar amounts in millions) Rate Principal amount of subordinated note/ debenture issued to trust (1) Investment in unconsolidated subsidiary Huntington Capital I 0.83 % (2) $ 70 $ 7 Huntington Capital II 0.76 (3) 32 3 Sky Financial Capital Trust III 1.53 (4) 72 2 Sky Financial Capital Trust IV 1.53 (4) 74 2 First Place Capital Trust I 3.00 (5) 4 — First Place Capital Trust II 6.45 4 — Total $ 256 $ 14 (1) Represents the principal amount of debentures issued to each trust, including unamortized original issue discount. (2) Variable effective rate at September 30, 2021, based on three-month LIBOR +0.70%. (3) Variable effective rate at September 30, 2021, based on three-month LIBOR +0.625%. (4) Variable effective rate at September 30, 2021, based on three-month LIBOR +1.40%. (5) Variable effective rate at September 30, 2021, based on three-month LIBOR +2.85%. 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. Affordable Housing Tax Credit Partnerships Huntington makes certain equity investments in various limited partnerships that sponsor affordable housing projects utilizing the 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 a majority of its investments in these entities. These investments are included in other assets. Investments that do not meet the requirements of the proportional amortization method are accounted for using the equity method. Investment 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, 2021 and December 31, 2020. (dollar amounts in millions) September 30, December 31, Affordable housing tax credit investments $ 2,134 $ 1,568 Less: amortization (698) (612) Net affordable housing tax credit investments $ 1,436 $ 956 Unfunded commitments $ 774 $ 500 The following table presents other information relating to Huntington’s affordable housing tax credit investments for the three-month and nine-month periods ended September 30, 2021 and 2020. Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Tax credits and other tax benefits recognized $ 36 $ 29 $ 113 $ 88 Proportional amortization expense included in provision for income taxes 34 25 92 75 There were no sales of affordable housing tax credit investments during the three-month and nine-month periods ended September 30, 2021 and 2020. There was no impairment recognized for the three-month and nine-month periods ended September 30, 2021 and 2020. Other investments Other investments determined to be VIE’s include investments in Small Business Investment Companies, Historic Tax Credit Investments, certain equity method investments, renewable energy financings, and other miscellaneous investments.

COMMITMENTS AND CONTINGENT LIAB

COMMITMENTS AND CONTINGENT LIABILITIES	9 Months Ended
	Sep. 30, 2021
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, 2021 and December 31, 2020, were as follows: (dollar amounts in millions) September 30, December 31, Contract amount representing credit risk Commitments to extend credit: Commercial $ 28,226 $ 20,701 Consumer 18,982 14,808 Commercial real estate 2,576 1,313 Standby letters of credit and guarantees on industrial revenue bonds 904 581 Commercial letters of credit 15 21 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. Collateral to secure any funding of these commitments predominately consists of residential and commercial real estate mortgage loans. Standby letters-of-credit and guarantees on industrial revenue bonds 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. Since the conditions under which Huntington is required to fund these commitments may not materialize, the cash requirements are expected to be less than the total outstanding commitments. The carrying amount of deferred revenue associated with these guarantees was $6 million and $5 million at September 30, 2021 and December 31, 2020, 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 secure these instruments. Litigation and Regulatory Matters In the ordinary course of business, Huntington is routinely a defendant in or party to pending and threatened legal and regulatory actions and proceedings. In view of the inherent difficulty of predicting the outcome of such matters, particularly where the claimants seek very large or indeterminate damages or where the matters present novel legal theories or involve a large number of parties, Huntington generally cannot predict what the eventual outcome of the pending matters will be, what the timing of the ultimate resolution of these matters will be, or what the eventual loss, fines or penalties related to each matter may be. Huntington establishes an accrued liability when those matters present loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued. Huntington thereafter continues to monitor the matter for further developments that could affect the amount of the accrued liability that has been previously established. For certain matters, Huntington is able to estimate a range of possible loss. In cases in which Huntington possesses information to estimate a range of possible loss, that estimate is aggregated and disclosed below. There may be other matters for which a loss is probable or reasonably possible but such an estimate of the range of possible loss may not be possible. For those matters where an estimate of the range of possible loss is possible, management currently estimates the aggregate range of reasonably possible loss is $0 to $15 million at September 30, 2021 in excess of the accrued liability (if any) related to those matters. This estimated range of possible loss is based upon currently available information and is subject to significant judgment, a variety of assumptions, and known and unknown uncertainties. The matters underlying the estimated range will change from time to time, and actual results may vary significantly from the current estimate. The estimated range of possible loss does not represent Huntington’s maximum loss exposure. Based on current knowledge, management does not believe that loss contingencies arising from pending matters will have a material adverse effect on the consolidated financial position of Huntington. Further, management believes that amounts accrued are adequate to address Huntington’s contingent liabilities. However, in light of the inherent uncertainties involved in these matters, some of which are beyond Huntington’s control, and the large or indeterminate damages sought in some of these matters, an adverse outcome in one or more of these matters could be material to Huntington’s results of operations for any particular reporting period.

SEGMENT REPORTING

SEGMENT REPORTING	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
SEGMENT REPORTING	SEGMENT REPORTING Huntington’s business segments are based on our internally-aligned segment leadership structure, which is how management monitors results and assesses performance. The Company has four major business segments: Consumer and Business Banking, Commercial Banking, Vehicle Finance, and Regional Banking and The Huntington Private Client Group (RBHPCG). The Treasury / Other function includes technology and operations, other unallocated assets, liabilities, revenue, and expense. For a description of our business segments, see Note 26 - Segment Reporting to the Consolidated Financial Statements appearing in Huntington’s 2020 Annual Report on Form 10-K. Listed in the following tables is certain operating basis financial information reconciled to Huntington’s September 30, 2021, December 31, 2020, and September 30, 2020, reported results by business segment. Three Months Ended September 30, Income Statements Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated (dollar amounts in millions) 2021 Net interest income $ 483 $ 416 $ 123 $ 42 $ 96 $ 1,160 Provision for credit losses (7) (34) (25) 4 — (62) Noninterest income 302 150 4 58 21 535 Noninterest expense 637 247 48 84 273 1,289 Provision (benefit) for income taxes 33 73 22 3 (41) 90 Income attributable to non-controlling interest — 1 — — — 1 Net income (loss) attributable to Huntington Bancshares Inc $ 122 $ 279 $ 82 $ 9 $ (115) $ 377 2020 Net interest income $ 367 $ 221 $ 110 $ 39 $ 80 $ 817 Provision for credit losses 87 87 (12) 15 — 177 Noninterest income 274 90 2 47 17 430 Noninterest expense 450 135 34 56 37 712 Provision (benefit) for income taxes 22 19 19 3 (8) 55 Income attributable to non-controlling interest — — — — — — Net income attributable to Huntington Bancshares Inc $ 82 $ 70 $ 71 $ 12 $ 68 $ 303 Nine months ended September 30, Income Statements Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated (dollar amounts in millions) 2021 Net interest income $ 1,187 $ 873 $ 340 $ 113 $ 457 $ 2,970 Provision for credit losses 57 107 (77) 2 — 89 Noninterest income 780 353 9 165 67 1,374 Noninterest expense 1,617 553 119 217 648 3,154 Provision (benefit) for income taxes 62 119 64 12 (51) 206 Income attributable to non-controlling interest — 1 — — — 1 Net income (loss) attributable to Huntington Bancshares Inc $ 231 $ 446 $ 243 $ 47 $ (73) $ 894 2020 Net interest income $ 1,099 $ 693 $ 316 $ 122 $ 169 $ 2,399 Provision for credit losses 200 611 118 16 — 945 Noninterest income 704 261 7 151 59 1,182 Noninterest expense 1,288 400 103 181 67 2,039 Provision (benefit) for income taxes 66 (12) 21 16 5 96 Income attributable to non-controlling interest — — — — — — Net income (loss) attributable to Huntington Bancshares Inc $ 249 $ (45) $ 81 $ 60 $ 156 $ 501 Assets at Deposits at (dollar amounts in millions) September 30, December 31, September 30, December 31, Consumer & Business Banking $ 41,656 $ 30,758 $ 94,439 $ 60,910 Commercial Banking 54,671 36,311 32,531 24,766 Vehicle Finance 20,122 19,789 1,437 722 RBHPCG 8,114 7,064 9,025 7,635 Treasury / Other 49,315 29,116 4,466 4,915 Total $ 173,878 $ 123,038 $ 141,898 $ 98,948

ACQUISITION OF TCF FINANCIAL _2

ACQUISITION OF TCF FINANCIAL CORPORATION (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table provides a preliminary allocation of consideration paid for the fair value of assets acquired and liabilities and equity assumed from TCF as of June 9, 2021. TCF (dollar amounts in millions) UPB Fair Value Assets acquired: Cash and due from banks $ 466 Interest-bearing deposits at Federal Reserve Bank 719 Interest-bearing deposits in banks 312 Available-for-sale securities 8,900 Other securities 358 Loans held for sale 363 Loans and leases: Commercial: Commercial and industrial $ 12,726 12,441 Commercial real estate 8,125 7,869 Lease financing 2,929 2,912 Total commercial 23,780 23,222 Consumer: Automobile 322 317 Residential mortgage 6,267 6,273 Home equity 2,644 2,607 RV and marine 581 570 Other consumer 179 167 Total consumer 9,993 9,934 Total loans and leases $ 33,773 33,156 Bank owned life insurance 181 Premises and equipment 360 Core deposit intangible 92 Other intangible assets 6 Servicing rights 59 Servicing rights and other intangible assets 157 Other assets 1,441 Total assets acquired 46,413 Liabilities and equity assumed: Deposits 38,663 Short-term borrowings 1,306 Long-term debt 1,516 Other liabilities 1,049 Total liabilities 42,534 Non-controlling interest 22 Net assets acquired $ 3,857 Consideration: Fair value of common stock issued $ 6,998 Fair value of preferred stock exchange 185 Total consideration $ 7,183 Goodwill $ 3,326
Purchased credit deteriorated loans and leases	The following table provides a summary of loans and leases purchased as part of the TCF acquisition with credit deterioration at acquisition: (dollar amounts in millions) Commercial Consumer Total Par value (UPB) $ 7,931 $ 1,333 $ 9,264 ALLL at acquisition (374) (58) (432) Non-credit (discount) (219) (68) (287) Fair value $ 7,338 $ 1,207 $ 8,545
Business Acquisition, Pro Forma Information	Unaudited Pro Forma for Three months ended Nine months ended September 30, September 30, (dollar amounts in millions) 2021 2020 2021 2020 Net interest income $ 1,160 $ 1,197 $ 3,625 $ 3,581 Noninterest income 535 554 1,604 1,586 Net income attributable to Huntington Bancshares Inc 377 364 1,268 433

INVESTMENT SECURITIES AND OTH_2

INVESTMENT SECURITIES AND OTHER SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses by Investment Category	The following tables provide amortized cost, fair value, and gross unrealized gains and losses by investment category at September 30, 2021 and December 31, 2020: Unrealized (dollar amounts in millions) Amortized Gross Gross Fair Value September 30, 2021 Available-for-sale securities: U.S. Treasury $ 5 $ — $ — $ 5 Federal agencies: Residential CMO 3,683 63 (12) 3,734 Residential MBS 14,413 47 (123) 14,337 Commercial MBS 1,522 11 (35) 1,498 Other agencies 263 1 — 264 Total U.S. Treasury, federal agency and other agency securities 19,886 122 (170) 19,838 Municipal securities 3,570 82 (18) 3,634 Private-label CMO 120 — — 120 Asset-backed securities 284 3 (2) 285 Corporate debt 1,789 5 (21) 1,773 Other securities/Sovereign debt 4 — — 4 Total available-for-sale securities $ 25,653 $ 212 $ (211) $ 25,654 Held-to-maturity securities: Federal agencies: Residential CMO $ 2,701 $ 56 $ (4) $ 2,753 Residential MBS 7,079 62 (33) 7,108 Commercial MBS 2,468 77 (1) 2,544 Other agencies 205 7 — 212 Total federal agency and other agency securities 12,453 202 (38) 12,617 Municipal securities 2 — — 2 Total held-to-maturity securities $ 12,455 $ 202 $ (38) $ 12,619 Other securities, at cost: Non-marketable equity securities: Federal Home Loan Bank stock $ 52 $ — $ — $ 52 Federal Reserve Bank stock 511 — — 511 Other securities, at fair value Mutual funds 62 — — 62 Equity securities 24 — — 24 Total other securities $ 649 $ — $ — $ 649 (1) Amortized cost amounts excludes accrued interest receivable, which is recorded within other assets on the Consolidated Balance Sheet s . At September 30, 2021, accrued interest receivable on available-for-sale securities and held-to-maturity securities totaled $60 million and $26 million, respectively. Unrealized (dollar amounts in millions) Amortized Gross Gross Fair Value December 31, 2020 Available-for-sale securities: U.S. Treasury $ 5 $ — $ — $ 5 Federal agencies: Residential CMO 3,550 121 (5) 3,666 Residential MBS 7,843 97 (5) 7,935 Commercial MBS 1,151 21 (9) 1,163 Other agencies 60 2 — 62 Total U.S. Treasury, federal agency and other agency securities 12,609 241 (19) 12,831 Municipal securities 2,928 91 (15) 3,004 Private-label CMO 9 — — 9 Asset-backed securities 185 7 — 192 Corporate debt 440 5 — 445 Other securities/Sovereign debt 4 — — 4 Total available-for-sale securities $ 16,175 $ 344 $ (34) $ 16,485 Held-to-maturity securities: Federal agencies: Residential CMO $ 1,779 $ 88 $ — $ 1,867 Residential MBS 3,715 103 — 3,818 Commercial MBS 3,118 191 — 3,309 Other agencies 246 12 — 258 Total federal agency and other agency securities 8,858 394 — 9,252 Municipal securities 3 — — 3 Total held-to-maturity securities $ 8,861 $ 394 $ — $ 9,255 Other securities, at cost: Non-marketable equity securities: Federal Home Loan Bank stock $ 60 $ — $ — $ 60 Federal Reserve Bank stock 299 — — 299 Other securities, at fair value Mutual funds 50 — — 50 Equity securities 8 1 — 9 Total other securities $ 417 $ 1 $ — $ 418 (1) Amortized cost amounts excludes accrued interest receivable, which is recorded within other assets on the Consolidated Balance Sheet s . At December 31, 2020, accrued interest receivable on available-for-sale securities and held-to-maturity securities totaled $32 million and $20 million, respectively.
Investments by Contractual Maturity	The following table provides the amortized cost and fair value of securities by contractual maturity at September 30, 2021 and December 31, 2020. Expected maturities may differ from contractual maturities as issuers may have the right to call or prepay obligations with or without incurring penalties. September 30, 2021 December 31, 2020 (dollar amounts in millions) Amortized Cost Fair Value Amortized Cost Fair Value Available-for-sale securities: Under 1 year $ 354 $ 351 $ 308 $ 304 After 1 year through 5 years 1,665 1,668 1,145 1,154 After 5 years through 10 years 2,935 2,962 1,607 1,654 After 10 years 20,699 20,673 13,115 13,373 Total available-for-sale securities $ 25,653 $ 25,654 $ 16,175 $ 16,485 Held-to-maturity securities: After 1 year through 5 years $ 80 $ 83 $ 160 $ 169 After 5 years through 10 years 70 72 131 138 After 10 years 12,305 12,464 8,570 8,948 Total held-to-maturity securities $ 12,455 $ 12,619 $ 8,861 $ 9,255
Investments with Unrealized Losses by Investment Category	The following tables provide detail on investment securities with unrealized losses aggregated by investment category and the length of time the individual securities have been in a continuous loss position at September 30, 2021 and December 31, 2020: Less than 12 Months Over 12 Months Total (dollar amounts in millions) Fair Gross Unrealized Fair Gross Unrealized Fair Gross Unrealized September 30, 2021 Available-for-sale securities: Federal agencies: Residential CMO 1,064 (7) 120 (5) 1,184 (12) Residential MBS 10,212 (123) — — 10,212 (123) Commercial MBS 900 (31) 25 (4) 925 (35) Other agencies 119 — — — 119 — Total federal agency and other agency securities 12,295 (161) 145 (9) 12,440 (170) Municipal securities 339 (8) 377 (10) 716 (18) Private-label CMO 58 — — — 58 — Asset-backed securities 186 (1) 7 (1) 193 (2) Corporate debt 1,184 (20) 28 (1) 1,212 (21) Total temporarily impaired available-for-sale securities $ 14,062 $ (190) $ 557 $ (21) $ 14,619 $ (211) Held-to-maturity securities: Federal agencies: Residential CMO $ 1,032 $ (4) $ — $ — $ 1,032 $ (4) Residential MBS $ 4,398 $ (33) $ — $ — $ 4,398 $ (33) Commercial MBS 271 (1) — — 271 (1) Total federal agency and other agency securities 5,701 (38) — — 5,701 (38) Total temporarily impaired held-to-maturity securities $ 5,701 $ (38) $ — $ — $ 5,701 $ (38) Less than 12 Months Over 12 Months Total (dollar amounts in millions) Fair Gross Unrealized Fair Gross Unrealized Fair Gross Unrealized December 31, 2020 Available-for-sale securities: Federal agencies: Residential CMO $ 302 $ (5) $ — $ — $ 302 $ (5) Residential MBS 1,633 (5) — — 1,633 (5) Commercial MBS 321 (9) — — 321 (9) Total federal agency and other agency securities 2,256 (19) — — 2,256 (19) Municipal securities 110 (3) 490 (12) 600 (15) Asset-backed securities 15 — — — 15 — Corporate debt 51 — — — 51 — Total temporarily impaired available-for-sale securities $ 2,432 $ (22) $ 490 $ (12) $ 2,922 $ (34)

LOANS _ LEASES (Tables)

LOANS / LEASES (Tables)	9 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loan and Lease Portfolio	The following table provides a detailed listing of Huntington’s loan and lease portfolio at September 30, 2021 and December 31, 2020. (dollar amounts in millions) September 30, 2021 December 31, 2020 Commercial loan and lease portfolio: Commercial and industrial $ 40,452 $ 33,151 Commercial real estate 14,694 7,199 Lease financing 4,991 2,222 Total commercial loan and lease portfolio 60,137 42,572 Consumer loan portfolio: Automobile 13,305 12,778 Residential mortgage 18,922 12,141 Home equity 10,919 8,894 RV and marine 5,052 4,190 Other consumer 2,232 1,033 Total consumer loan portfolio 50,430 39,036 Total loans and leases (1) (2) 110,567 81,608 Allowance for loan and lease losses (2,107) (1,814) Net loans and leases $ 108,460 $ 79,794 (1) Loans and leases are reported at principal amount outstanding including unamortized purchase premiums and discounts, unearned income, and net direct fees and costs associated with originating and acquiring loans and leases. The aggregate amount of these loan and lease adjustments was a net (discount) premium of $(85) million and $171 million at September 30, 2021 and December 31, 2020, respectively. (2) The total amount of accrued interest recorded for these loans and leases at September 30, 2021, was $146 million and $143 million of commercial and consumer loan and lease portfolios, respectively, and at December 31, 2020, was $146 million and $123 million of commercial and consumer loan and lease portfolios, respectively. Accrued interest is presented in other assets within the Condensed Consolidated Balance Sheet
Direct Financing Lease, Lease Income	The following table presents net investments in lease financing receivables by category at September 30, 2021 and December 31, 2020. (dollar amounts in millions) September 30, December 31, Lease payments receivable $ 4,622 $ 1,737 Estimated residual value of leased assets 781 664 Gross investment in lease financing receivables 5,403 2,401 Deferred origination costs 24 21 Deferred fees, unearned income and other (436) (200) Total lease financing receivables $ 4,991 $ 2,222
NALs and Past Due Loans	The following table presents NALs by class at September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 (dollar amounts in millions) Nonaccrual loans and leases with no ACL Total nonaccrual loans and leases Nonaccrual loans and leases with no ACL Total nonaccrual loans and leases Commercial and industrial $ 141 $ 494 $ 69 $ 349 Commercial real estate 27 103 8 15 Lease financing 2 60 — 4 Automobile — 3 — 4 Residential mortgage — 108 — 88 Home equity — 87 — 70 RV and marine — 6 — 2 Other consumer — — — — Total nonaccrual loans and leases $ 170 $ 861 $ 77 $ 532
Aging analysis of loans and leases	The following table presents an aging analysis of loans and leases, by class at September 30, 2021 and December 31, 2020: September 30, 2021 Past Due (1) Loans Accounted for Under FVO Total Loans 90 or (dollar amounts in millions) 30-59 60-89 90 or Total Current Commercial and industrial $ 86 $ 28 $ 80 $ 194 $ 40,258 $ — $ 40,452 $ 6 Commercial real estate 9 5 18 32 14,662 — 14,694 — Lease financing 87 20 19 126 4,865 — 4,991 12 (2) Automobile 61 13 7 81 13,224 — 13,305 5 Residential mortgage 106 44 212 362 18,422 138 18,922 138 (3) Home equity 42 14 65 121 10,797 1 10,919 10 RV and marine 12 2 3 17 5,035 — 5,052 2 Other consumer 11 3 2 16 2,216 — 2,232 2 Total loans and leases $ 414 $ 129 $ 406 $ 949 $ 109,479 $ 139 $ 110,567 $ 175 December 31, 2020 Past Due (1)(4) Loans Accounted for Under FVO Total Loans 90 or (dollar amounts in millions) 30-59 60-89 90 or Total Current Commercial and industrial $ 38 $ 33 $ 82 $ 153 $ 32,998 $ — $ 33,151 $ — Commercial real estate — 1 11 12 7,187 — 7,199 — Lease financing 22 5 13 40 2,182 — 2,222 10 (2) Automobile 84 22 12 118 12,660 — 12,778 9 Residential mortgage 114 38 194 346 11,702 93 12,141 132 (3) Home equity 35 15 61 111 8,782 1 8,894 14 RV and marine 17 3 3 23 4,167 — 4,190 3 Other consumer 9 4 3 16 1,017 — 1,033 3 Total loans and leases $ 319 $ 121 $ 379 $ 819 $ 80,695 $ 94 $ 81,608 $ 171 (1) NALs are included in this aging analysis based on the loan’s past due status. (2) Amounts include Huntington Technology Finance administrative lease delinquencies. (3) Amounts include mortgage loans insured by U.S. government agencies. (4) The principal balance of loans in payment deferral programs offered in response to the COVID-19 pandemic which are performing according to their modified terms are generally not considered delinquent.
Loan and lease balances by credit quality indicator	The following tables present the amortized cost basis of loans and leases by vintage and credit quality indicator at September 30, 2021 and December 31, 2020 respectively: As of September 30, 2021 Term Loans Amortized Cost Basis by Origination Year Revolver Total at Amortized Cost Basis Revolver Total Converted to Term Loans (dollar amounts in millions) 2021 2020 2019 2018 2017 Prior Total Commercial and industrial Credit Quality Indicator (1): Pass $ 10,821 $ 6,941 $ 4,246 $ 2,626 $ 1,222 $ 1,320 $ 10,698 $ 3 $ 37,877 OLEM 148 204 176 122 33 81 133 — 897 Substandard 182 171 266 244 146 193 469 — 1,671 Doubtful 1 — — 4 — 1 1 — 7 Total Commercial and industrial $ 11,152 $ 7,316 $ 4,688 $ 2,996 $ 1,401 $ 1,595 $ 11,301 $ 3 $ 40,452 Commercial real estate Credit Quality Indicator (1): Pass $ 2,561 $ 2,813 $ 2,939 $ 1,769 $ 929 $ 1,286 $ 613 $ — $ 12,910 OLEM 57 172 77 78 82 46 1 — 513 Substandard 280 284 329 134 149 77 18 — 1,271 Total Commercial real estate $ 2,898 $ 3,269 $ 3,345 $ 1,981 $ 1,160 $ 1,409 $ 632 $ — $ 14,694 Lease financing Credit Quality Indicator (1): Pass $ 1,383 $ 1,655 $ 915 $ 499 $ 282 $ 168 $ — $ — $ 4,902 OLEM 8 10 9 4 4 1 — — 36 Substandard 3 14 18 1 8 9 — — 53 Total Lease financing $ 1,394 $ 1,679 $ 942 $ 504 $ 294 $ 178 $ — $ — $ 4,991 Automobile Credit Quality Indicator (2): 750+ $ 2,250 $ 2,112 $ 1,563 $ 785 $ 441 $ 174 $ — $ — $ 7,325 650-749 1,879 1,442 867 458 212 96 — — 4,954 <650 283 252 200 149 87 55 — — 1,026 Total Automobile $ 4,412 $ 3,806 $ 2,630 $ 1,392 $ 740 $ 325 $ — $ — $ 13,305 Residential mortgage Credit Quality Indicator (2): 750+ $ 4,359 $ 4,253 $ 1,214 $ 678 $ 817 $ 2,132 $ — $ — $ 13,453 650-749 1,443 960 420 301 270 975 — — 4,369 <650 39 56 99 125 102 541 — — 962 Total Residential mortgage $ 5,841 $ 5,269 $ 1,733 $ 1,104 $ 1,189 $ 3,648 $ — $ — $ 18,784 Home equity Credit Quality Indicator (2): 750+ $ 570 $ 812 $ 101 $ 70 $ 61 $ 459 $ 4,796 $ 201 $ 7,070 650-749 138 156 98 62 38 232 2,320 172 3,216 <650 5 10 30 28 23 114 331 91 632 Total Home equity $ 713 $ 978 $ 229 $ 160 $ 122 $ 805 $ 7,447 $ 464 $ 10,918 RV and marine Credit Quality Indicator (2): 750+ $ 1,022 $ 982 $ 495 $ 518 $ 301 $ 364 $ — $ — $ 3,682 650-749 312 303 190 173 117 167 — — 1,262 <650 5 11 17 20 22 33 — — 108 Total RV and marine $ 1,339 $ 1,296 $ 702 $ 711 $ 440 $ 564 $ — $ — $ 5,052 Other consumer Credit Quality Indicator (2): 750+ $ 486 $ 217 $ 239 $ 83 $ 32 $ 73 $ 586 $ 2 $ 1,718 650-749 42 32 46 14 5 7 282 24 452 <650 3 2 7 3 1 2 26 18 62 Total Other consumer $ 531 $ 251 $ 292 $ 100 $ 38 $ 82 $ 894 $ 44 $ 2,232 (1) Consistent with the credit quality disclosures, indicators for the Commercial portfolio are based on internally defined categories of credit grades which are generally refreshed at least semi-annually. (2) Consistent with the credit quality disclosures, indicators for the Consumer portfolio are based on updated customer credit scores refreshed at least quarterly. As of December 31, 2020 Term Loans Amortized Cost Basis by Origination Year Revolver Total at Amortized Cost Basis Revolver Total Converted to Term Loans (dollar amounts in millions) 2020 2019 2018 2017 2016 Prior Total Commercial and industrial Credit Quality Indicator (1): Pass $ 12,599 $ 4,161 $ 2,537 $ 1,192 $ 837 $ 815 $ 8,894 $ 2 $ 31,037 OLEM 415 112 65 24 32 22 124 — 794 Substandard 195 125 181 203 41 147 423 — 1,315 Doubtful 2 — 1 — — 1 1 — 5 Total Commercial and industrial $ 13,211 $ 4,398 $ 2,784 $ 1,419 $ 910 $ 985 $ 9,442 $ 2 $ 33,151 Commercial real estate Credit Quality Indicator (1): Pass $ 1,742 $ 1,610 $ 1,122 $ 507 $ 507 $ 539 $ 633 $ — $ 6,660 OLEM 94 78 63 37 28 14 4 — 318 Substandard 27 46 10 29 58 14 36 — 220 Doubtful — — — — — 1 — — 1 Total Commercial real estate $ 1,863 $ 1,734 $ 1,195 $ 573 $ 593 $ 568 $ 673 $ — $ 7,199 Lease financing Credit Quality Indicator (1): Pass $ 1,158 $ 364 $ 221 $ 155 $ 137 $ 101 $ — $ — $ 2,136 OLEM 6 4 4 6 1 — — — 21 Substandard 1 19 7 21 5 12 — — 65 Total Lease financing $ 1,165 $ 387 $ 232 $ 182 $ 143 $ 113 $ — $ — $ 2,222 Automobile Credit Quality Indicator (2): 750+ $ 2,670 $ 2,013 $ 1,144 $ 742 $ 317 $ 81 $ — $ — $ 6,967 650-749 1,965 1,343 755 386 175 52 — — 4,676 <650 312 301 244 157 84 37 — — 1,135 Total Automobile $ 4,947 $ 3,657 $ 2,143 $ 1,285 $ 576 $ 170 $ — $ — $ 12,778 Residential mortgage Credit Quality Indicator (2): 750+ $ 3,269 $ 1,370 $ 891 $ 1,064 $ 762 $ 1,243 $ 1 $ — $ 8,600 650-749 991 435 307 278 171 495 — — 2,677 <650 34 89 111 108 81 348 — — 771 Total Residential mortgage $ 4,294 $ 1,894 $ 1,309 $ 1,450 $ 1,014 $ 2,086 $ 1 $ — $ 12,048 Home equity Credit Quality Indicator (2): 750+ $ 793 $ 26 $ 26 $ 32 $ 89 $ 451 $ 4,373 $ 192 $ 5,982 650-749 147 9 8 11 27 157 1,906 181 2,446 <650 1 1 1 1 6 70 286 99 465 Total Home equity $ 941 $ 36 $ 35 $ 44 $ 122 $ 678 $ 6,565 $ 472 $ 8,893 RV and marine Credit Quality Indicator (2): 750+ $ 1,136 $ 525 $ 589 $ 337 $ 153 $ 254 $ — $ — $ 2,994 650-749 348 215 201 136 64 129 — — 1,093 <650 4 15 21 22 12 29 — — 103 Total RV and marine $ 1,488 $ 755 $ 811 $ 495 $ 229 $ 412 $ — $ — $ 4,190 Other consumer Credit Quality Indicator (2): 750+ $ 69 $ 58 $ 26 $ 8 $ 4 $ 14 $ 340 $ 2 $ 521 650-749 36 56 17 5 2 3 294 30 443 <650 2 8 3 1 — 1 26 28 69 Total Other consumer $ 107 $ 122 $ 46 $ 14 $ 6 $ 18 $ 660 $ 60 $ 1,033 (1) Consistent with the credit quality disclosures, indicators for the Commercial portfolio are based on internally defined categories of credit grades which are generally refreshed at least semi-annually. (2) Consistent with the credit quality disclosures, indicators for the Consumer portfolio are based on updated customer credit scores refreshed at least quarterly.
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, 2021 and 2020. New Troubled Debt Restructurings (1) Three Months Ended September 30, 2021 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 16 $ — $ 3 $ — $ — $ 3 Commercial real estate 4 — — — — — Automobile 498 — 3 1 — 4 Residential mortgage 74 — 7 2 — 9 Home equity 42 — 1 1 — 2 RV and marine 19 — — — — — Other consumer 49 — — — — — Total new TDRs 702 $ — $ 14 $ 4 $ — $ 18 Three Months Ended September 30, 2020 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 39 $ — $ 28 $ — $ — $ 28 Commercial real estate 2 — — — — — Automobile 726 — 5 2 — 7 Residential mortgage 242 — 40 2 — 42 Home equity 90 — 2 3 1 6 RV and marine 30 — 1 — — 1 Other consumer 122 1 — — — 1 Total new TDRs 1,251 $ 1 $ 76 $ 7 $ 1 $ 85 New Troubled Debt Restructurings (1) Nine Months Ended September 30, 2021 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 53 $ 15 $ 23 $ — $ — $ 38 Commercial real estate 4 — — — — — Automobile 1,914 — 13 3 — 16 Residential mortgage 232 — 31 4 — 35 Home equity 155 — 3 5 — 8 RV and marine finance 103 1 1 1 — 3 Other consumer 214 — — — 1 1 Total new TDRs 2,675 $ 16 $ 71 $ 13 $ 1 $ 101 Nine Months Ended September 30, 2020 Number of Post-modification Outstanding Recorded Investment (2) (dollar amounts in millions) Interest rate reduction Amortization or maturity date change Chapter 7 bankruptcy Other Total Commercial and industrial 277 $ — $ 116 $ — $ 58 $ 174 Commercial real estate 11 — 3 — — 3 Automobile 2,582 — 26 5 — 31 Residential mortgage 448 — 62 5 — 67 Home equity 216 — 5 6 2 13 RV and marine finance 126 — 4 — — 4 Other consumer 513 3 — — — 3 Total new TDRs 4,173 $ 3 $ 216 $ 16 $ 60 $ 295 (1) TDRs may include multiple concessions and the disclosure classifications are based on the primary concession provided to the borrower. (2) Post-modification balances approximate pre-modification balances.

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Allowance Roll-forward	Allowance for Credit Losses - Roll-forward The following tables present ACL activity by portfolio segment for the three-month and nine-month periods ended September 30, 2021 and 2020. (dollar amounts in millions) Commercial Consumer Total Three-month period ended September 30, 2021: ALLL balance, beginning of period $ 1,618 $ 600 $ 2,218 Loan and lease charge-offs (74) (32) (106) Recoveries of loans and leases previously charged-off 27 24 51 Provision (benefit) for loan and lease losses (22) (34) (56) ALLL balance, end of period $ 1,549 $ 558 $ 2,107 AULC balance, beginning of period $ 76 $ 28 $ 104 Provision for unfunded lending commitments 2 (8) (6) AULC balance, end of period $ 78 $ 20 $ 98 ACL balance, end of period $ 1,627 $ 578 $ 2,205 Nine-month period ended September 30, 2021: ALLL balance, beginning of period $ 1,236 $ 578 $ 1,814 Loan and lease charge-offs (213) (90) (303) Recoveries of loans and leases previously charged-off 58 64 122 Provision for loan and lease losses (1) 94 (52) 42 Allowance on loans and leases purchased with credit deterioration 374 58 432 ALLL balance, end of period $ 1,549 $ 558 $ 2,107 AULC balance, beginning of period $ 34 $ 18 $ 52 Provision for unfunded lending commitments (2) 45 2 47 Unfunded lending commitment losses (1) — (1) AULC balance, end of period $ 78 $ 20 $ 98 ACL balance, end of period $ 1,627 $ 578 $ 2,205 (dollar amounts in millions) Commercial Consumer Total Three-month period ended September 30, 2020: ALLL balance, beginning of period $ 1,169 $ 533 $ 1,702 Loan and lease charge-offs (101) (40) (141) Recoveries of loans and leases previously charged-off 12 16 28 Provision for loan and lease losses 183 24 207 ALLL balance, end of period $ 1,263 $ 533 $ 1,796 AULC balance, beginning of period $ 81 $ 38 $ 119 Provision (reduction in allowance) for unfunded lending commitments (27) (3) (30) Unfunded lending commitment losses (7) — (7) AULC balance, end of period $ 47 $ 35 $ 82 ACL balance, end of period $ 1,310 $ 568 $ 1,878 Nine-month period ended September 30, 2020: ALLL balance, beginning of period $ 552 $ 231 $ 783 Cumulative-effect of change in accounting principle for financial instruments - credit losses (3) 180 211 391 Loan and lease charge-offs (272) (128) (400) Recoveries of loans and leases previously charged-off 20 43 63 Provision for loan and lease losses 783 176 959 ALLL balance, end of period $ 1,263 $ 533 $ 1,796 AULC balance, beginning of period $ 102 $ 2 $ 104 Cumulative-effect of change in accounting principle for financial instruments - credit losses (3) (38) 40 2 Provision (reduction in allowance) for unfunded lending commitments (7) (7) (14) Unfunded lending commitment losses (10) — (10) AULC balance, end of period $ 47 $ 35 $ 82 ACL balance, end of period $ 1,310 $ 568 $ 1,878 (1) Includes $234 million of TCF acquisition initial provision for credit losses related to non-PCD loans and leases. (2) Includes $60 million from acquired unfunded lending commitments. (3) Relates to day one impact of the CECL adjustment as a result of the implementation of ASU 2016-13.

MORTGAGE LOAN SALES AND SERVI_2

MORTGAGE LOAN SALES AND SERVICING RIGHTS (Tables)	9 Months Ended
	Sep. 30, 2021
Transfers and Servicing [Abstract]
Summarizes activity relating to loans securitized sold with servicing retained	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, 2021 and 2020: Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Residential mortgage loans sold with servicing retained $ 2,298 $ 2,391 $ 7,302 $ 6,106 Pretax gains resulting from above loan sales (1) 80 98 274 196 (1) Recorded in mortgage banking income.
Summarizes activity relating to loans sold with servicing retained using the fair value method	The following table summarizes the changes in MSRs recorded using the fair value method for the three-month and nine-month periods ended September 30, 2021 and 2020: Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Fair value, beginning of period $ 327 $ 172 $ 210 $ 7 Fair value election for servicing assets previously measured using the amortized method (1) — — — 205 Servicing assets obtained in acquisition — `` — 59 — New servicing assets created 31 30 103 70 Change in fair value during the period due to: Time decay (2) (4) (2) (11) (6) Payoffs (3) (17) (13) (50) (29) Changes in valuation inputs or assumptions (4) 1 4 27 (56) Fair value, end of period $ 338 $ 191 $ 338 $ 191 Weighted-average life (years) 7.0 6.4 7.0 6.4 (1) Prior to January 1, 2020, substantially all of Huntington’s MSR assets were recorded at amortized cost. (2) Represents decrease in value due to passage of time, including the impact from both regularly scheduled principal payments and partial loan paydowns. (3) Represents decrease in value associated with loans that paid off during the period. (4) Represents change in value resulting primarily from market-driven changes in interest rates.
Summary of key assumptions and the sensitivity of the servicing rights value to changes in the assumptions	summary of key assumptions and the sensitivity of the MSR value to changes in these assumptions at September 30, 2021, and December 31, 2020 follows: September 30, 2021 December 31, 2020 Decline in fair value due to Decline in fair value due to (dollar amounts in millions) Actual 10% 20% Actual 10% 20% Constant prepayment rate (annualized) 12.21 % $ (16) $ (30) 17.36 % $ (12) $ (23) Spread over forward interest rate swap rates 545 bps (7) (14) 519 bps (4) (8)

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	A rollforward of goodwill by business segment for the first nine-month period of 2021 is presented in the table below. (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Balance, December 31, 2020 $ 1,393 $ 427 $ — $ 170 $ — $ 1,990 TCF acquisition 2,006 1,260 — 60 — 3,326 Balance, September 30, 2021 $ 3,399 $ 1,687 $ — $ 230 $ — $ 5,316
Schedule of Finite-Lived Intangible Assets	(dollar amounts in millions) Gross Accumulated Net September 30, 2021 Core deposit intangible $ 389 $ (165) $ 224 Customer relationship 108 (77) 31 Total other intangible assets $ 497 $ (242) $ 255 December 31, 2020 Core deposit intangible $ 310 $ (150) $ 160 Customer relationship 101 (70) 31 Total other intangible assets $ 411 $ (220) $ 191
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	(dollar amounts in millions) Amortization Expense 2021 $ 14 2022 53 2023 49 2024 45 2025 42 2026 29

BORROWINGS (Tables)

BORROWINGS (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Short-term Debt	Borrowings with original maturities of one year or less are classified as short-term and were comprised of the following at September 30, 2021 and December 31, 2020, respectively: (dollar amounts in millions) September 30, December 31, Federal funds purchased and securities sold under agreements to repurchase $ 401 $ 71 Other borrowings 34 112 Total short-term borrowings $ 435 $ 183
Schedule of Long-term Debt Instruments	Huntington’s long-term debt consisted of the following at September 30, 2021 and December 31, 2020, respectively: (dollar amounts in millions) September 30, December 31, The Parent Company: Senior Notes $ 2,802 $ 3,635 Subordinated Notes 1,037 507 Total notes issued by the parent 3,839 4,142 The Bank: Senior Notes 2,451 3,533 Subordinated Notes 813 233 Total notes issued by the bank 3,264 3,766 FHLB Advances 216 3 Other 460 441 Total long-term debt $ 7,779 $ 8,352

OTHER COMPREHENSIVE INCOME (Tab

OTHER COMPREHENSIVE INCOME (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Components of other comprehensive income	The components of Huntington’s OCI for the three-month and nine-month periods ended September 30, 2021 and 2020, were as follows: Three Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ (112) $ 26 $ (86) Less: Reclassification adjustment for realized net losses (gains) included in net income 5 (1) 4 Net change in unrealized holding gains (losses) on available-for-sale securities (107) 25 (82) Net change in fair value on cash flow hedges (43) 14 (29) Foreign currency translation adjustment (1) (7) — (7) Net unrealized gains (losses) on net investment hedges 9 — 9 Translation adjustments, net of hedges (1) 2 — 2 Net change in pension and other post-retirement obligations 3 — 3 Total other comprehensive income $ (145) $ 39 $ (106) Three Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ — $ — $ — Less: Reclassification adjustment for realized net losses (gains) included in net income 6 (1) 5 Net change in unrealized gains (losses) on available-for-sale securities 6 (1) 5 Net change in fair value on cash flow hedges (52) 12 (40) Net change in pension and other post-retirement obligations 3 (1) 2 Total other comprehensive income $ (43) $ 10 $ (33) Nine Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ (311) $ 70 $ (241) Less: Reclassification adjustment for realized net losses (gains) included in net income 27 (6) 21 Net change in unrealized holding gains (losses) on available-for-sale securities (284) 64 (220) Net change in fair value on cash flow hedges (135) 33 (102) Foreign currency translation adjustment (1) (13) — (13) Net unrealized gains (losses) on net investment hedges 9 — 9 Translation adjustments, net of hedges (1) (4) — (4) Net change in pension and other post-retirement obligations 12 (3) 9 Total other comprehensive loss $ (411) $ 94 $ (317) Nine Months Ended Tax (expense) (dollar amounts in millions) Pretax benefit After-tax Unrealized gains (losses) on available-for-sale securities arising during the period $ 274 $ (61) $ 213 Less: Reclassification adjustment for realized net losses (gains) included in net income 35 (8) 27 Net change in unrealized holding gains (losses) on available-for-sale securities 309 (69) 240 Net change in fair value on cash flow hedges 358 (79) 279 Net change in pension and other post-retirement obligations (2) (8) 2 (6) Total other comprehensive income $ 659 $ (146) $ 513 (1) Foreign investments are deemed to be permanent in nature and, therefore, Huntington does not provide for taxes on foreign currency translation adjustments. (2) Includes a settlement gain recognized in other noninterest income on the Unaudited Condensed Consolidated Statements of Income.
Activity in accumulated other comprehensive income, net of tax	Activity in accumulated OCI for the three-month and nine-month periods ended September 30, 2021 and 2020, were as follows: (dollar amounts in millions) Unrealized gains (losses) on debt securities (1) Change in fair value related to cash flow hedges Translation adjustments, net of hedges Unrealized gains (losses) for pension and other post- retirement obligations (2) Total Three Months Ended September 30, 2021 Balance, beginning of period $ 50 $ 184 $ (6) $ (247) $ (19) Other comprehensive income (loss) before reclassifications (86) (29) 2 — (113) Amounts reclassified from accumulated OCI to earnings 4 — — 3 7 Period change (82) (29) 2 3 (106) Balance, end of period $ (32) $ 155 $ (4) $ (244) $ (125) Three Months Ended September 30, 2020 Balance, beginning of period $ 207 $ 342 $ — $ (259) $ 290 Other comprehensive income before reclassifications — (40) — — (40) Amounts reclassified from accumulated OCI to earnings 5 — — 2 7 Period change 5 (40) — 2 (33) Balance, end of period $ 212 $ 302 $ — $ (257) $ 257 (dollar amounts in millions) Unrealized gains (losses) on debt securities (1) Change in fair value related to cash flow hedges Translation adjustments, net of hedges Unrealized gains (losses) for pension and other post- retirement obligations (2) Total Nine Months Ended September 30, 2021 Balance, beginning of period $ 188 $ 257 $ — $ (253) $ 192 Other comprehensive loss before reclassifications (241) (102) (4) — (347) Amounts reclassified from accumulated OCI to earnings 21 — — 9 30 Period change (220) (102) (4) 9 (317) Balance, end of period $ (32) $ 155 $ (4) $ (244) $ (125) Nine Months Ended September 30, 2020 Balance, beginning of period $ (28) $ 23 $ — $ (251) $ (256) Other comprehensive income before reclassifications 213 279 — — 492 Amounts reclassified from accumulated OCI to earnings 27 — — (6) 21 Period change 240 279 — (6) 513 Balance, end of period $ 212 $ 302 $ — $ (257) $ 257 (1) AOCI amounts at September 30, 2021 and September 30, 2020 include $41 million and $74 million, respectively, of net unrealized losses on securities transferred from the available-for-sale securities portfolio to the held-to-maturity securities portfolio. The net unrealized losses will be recognized in earnings over the remaining life of the security using the effective interest method.

SHAREHOLDERS' EQUITY (Tables)

SHAREHOLDERS' EQUITY (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Schedule of Stock	The following is a summary of Huntington’s non-cumulative, non-voting, perpetual preferred stock outstanding as of September 30, 2021. (dollar amounts in millions) Series Issuance Date Total Shares Outstanding Amount Dividend Rate Earliest Redemption Date Series B 12/28/2011 35,500 $ 23 3-mo. LIBOR + 270 bps 1/15/2017 Series C 8/16/2016 100,000 100 5.875 % 10/15/2021 Series E 2/27/2018 5,000 495 5.700 4/15/2023 Series F 5/27/2020 5,000 494 5.625 7/15/2030 Series G 8/3/2020 5,000 494 4.450 10/15/2027 Series H 2/2/2021 500,000 486 4.500 4/15/2026 Series I 6/9/2021 7,000 175 5.700 12/01/2022 Total 657,500 $ 2,267 The following table presents the dividends declared for each series of Preferred shares for the three-month and nine-month periods ended September 30, 2021 and 2020: Three Months Ended September 30, Nine months ended September 30, (amounts in millions, except per share data) 2021 2020 2021 2020 Cash Dividend Declared Per Share Cash Dividend Declared Per Share Cash Dividend Declared Per Share Cash Dividend Declared Per Share Preferred Series Amount ($) Amount ($) Amount ($) Amount ($) Series B $ 7.07 $ — $ 7.44 $ — $ 21.63 $ — $ 28.56 $ (1) Series C 14.69 (1) 14.69 (1) 44.07 (4) 44.07 (4) Series D — — 15.63 (10) 31.25 (18) 46.88 (29) Series E 1,425.00 (7) 1,425.00 (7) 4,275.00 (21) 4,275.00 (21) Series F 1,406.25 (7) 2,062.50 (10) 4,218.75 (21) 2,062.50 (10) Series G 1,112.50 (6) — — 3,337.50 (18) — — Series H 11.25 (6) — — 30.75 (16) — — Series I 356.25 (2) — — 712.50 (5) — — Total $ (29) $ (28) $ (103) $ (65)

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Basic and diluted earnings loss per share	The calculation of basic and diluted earnings per share for the three-month and nine-month periods ended September 30, 2021 and 2020 was as follows: Three Months Ended Nine Months Ended (dollar amounts in millions, except per share data, share count in thousands) 2021 2020 2021 2020 Basic earnings per common share: Net income attributable to Huntington Bancshares Inc $ 377 $ 303 $ 894 $ 501 Preferred stock dividends 29 28 103 65 Impact of preferred stock redemption 15 — 15 — Net income available to common shareholders $ 333 $ 275 $ 776 $ 436 Average common shares issued and outstanding 1,462,736 1,017,253 1,201,763 1,017,052 Basic earnings per common share $ 0.23 $ 0.27 $ 0.65 $ 0.43 Diluted earnings per common share: Dilutive potential common shares: Stock options and restricted stock units and awards 17,536 9,005 17,623 9,628 Shares held in deferred compensation plans 7,063 5,202 6,042 4,893 Dilutive potential common shares 24,599 14,207 23,665 14,521 Total diluted average common shares issued and outstanding 1,487,335 1,031,460 1,225,428 1,031,573 Diluted earnings per common share $ 0.22 $ 0.27 $ 0.63 $ 0.42 Anti-dilutive awards (1) 4,609 13,954 4,410 12,420 (1) Reflects the total number of shares related to outstanding options and awards that have been excluded from the computation of diluted earnings per share because the impact would have been anti-dilutive.

NONINTEREST INCOME (Tables)

NONINTEREST INCOME (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Noninterest Income	The following table shows Huntington’s total noninterest income segregated between contracts with customers within the scope of ASC 606 and those within the scope of other GAAP Topics. (dollar amounts in millions) Three Months Ended September 30, Nine Months Ended September 30, Noninterest income 2021 2020 2021 2020 Noninterest income from contracts with customers $ 315 $ 224 $ 794 $ 652 Noninterest income within the scope of other GAAP topics 220 206 580 530 Total noninterest income $ 535 $ 430 $ 1,374 $ 1,182 The following table illustrates the disaggregation by operating segment and major revenue stream and reconciles disaggregated revenue to segment revenue presented in Note 17 “ Segment Reporting ”. Three Months Ended September 30, 2021 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 89 $ 23 $ 1 $ 1 $ — $ 114 Card and payment processing income 85 6 — — — 91 Trust and investment management services 17 — — 44 — 61 Insurance income 12 2 — 11 — 25 Other noninterest income 8 5 1 2 8 24 Net revenue from contracts with customers $ 211 $ 36 $ 2 $ 58 $ 8 $ 315 Noninterest income within the scope of other GAAP topics 91 114 2 — 13 220 Total noninterest income $ 302 $ 150 $ 4 $ 58 $ 21 $ 535 Three Months Ended September 30, 2020 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 54 $ 19 $ 2 $ 1 $ — $ 76 Card and payment processing income 59 4 — — — 63 Trust and investment management services 13 1 — 34 — 48 Insurance income 12 2 — 11 (1) 24 Other noninterest income 6 6 1 3 (3) 13 Net revenue from contracts with customers $ 144 $ 32 $ 3 $ 49 $ (4) $ 224 Noninterest income within the scope of other GAAP topics 130 58 (1) (2) 21 206 Total noninterest income $ 274 $ 90 $ 2 $ 47 $ 17 $ 430 Nine Months Ended September 30, 2021 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 201 $ 64 $ 4 $ 2 $ — $ 271 Card and payment processing income 211 14 — — — 225 Trust and investment management services 45 1 — 122 — 168 Insurance income 38 5 — 33 1 77 Other noninterest income 19 14 2 7 11 53 Net revenue from contracts with customers $ 514 $ 98 $ 6 $ 164 $ 12 $ 794 Noninterest income within the scope of other GAAP topics 266 255 3 1 55 580 Total noninterest income $ 780 $ 353 $ 9 $ 165 $ 67 $ 1,374 Nine Months Ended September 30, 2020 (dollar amounts in millions) Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated Major Revenue Streams Service charges on deposit accounts $ 161 $ 54 $ 4 $ 3 $ — $ 222 Card and payment processing income 163 11 — — — 174 Trust and investment management services 33 3 — 104 — 140 Insurance income 32 5 — 34 1 72 Other noninterest income 18 14 2 11 (1) 44 Net revenue from contracts with customers $ 407 $ 87 $ 6 $ 152 $ — $ 652 Noninterest income within the scope of other GAAP topics 297 174 1 (1) 59 530 Total noninterest income $ 704 $ 261 $ 7 $ 151 $ 59 $ 1,182

FAIR VALUES OF ASSETS AND LIA_2

FAIR VALUES OF ASSETS AND LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2021
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, 2021 and December 31, 2020 are summarized in the following tables: Fair Value Measurements at Reporting Date Using Netting Adjustments (1) September 30, 2021 (dollar amounts in millions) Level 1 Level 2 Level 3 Assets Trading account securities: Municipal securities $ — $ 77 $ — $ — $ 77 — 77 — — 77 Available-for-sale securities: U.S. Treasury securities 5 — — — 5 Residential CMOs — 3,734 — — 3,734 Residential MBS — 14,337 — — 14,337 Commercial MBS — 1,498 — — 1,498 Other agencies — 264 — — 264 Municipal securities — 52 3,582 — 3,634 Private-label CMO — 102 18 — 120 Asset-backed securities — 250 35 — 285 Corporate debt — 1,773 — — 1,773 Other securities/sovereign debt — 4 — — 4 5 22,014 3,635 — 25,654 Other securities 62 24 — — 86 Loans held for sale — 1,297 — — 1,297 Loans held for investment — 119 20 — 139 MSRs — — 338 — 338 Other assets: Derivative assets — 1,567 19 (686) 900 Assets held in trust for deferred compensation plans 151 — — — 151 Liabilities Other liabilities: Derivative liabilities — 1,056 7 (813) 250 Fair Value Measurements at Reporting Date Using Netting Adjustments (1) December 31, 2020 (dollar amounts in millions) Level 1 Level 2 Level 3 Assets Trading account securities: Municipal securities $ — $ 62 $ — $ — $ 62 Available-for-sale securities: U.S. Treasury securities 5 — — — 5 Residential CMOs — 3,666 — — 3,666 Residential MBS — 7,935 — — 7,935 Commercial MBS — 1,163 — — 1,163 Other agencies — 62 — — 62 Municipal securities — 53 2,951 — 3,004 Private-label CMO — — 9 — 9 Asset-backed securities — 182 10 — 192 Corporate debt — 445 — — 445 Other securities/sovereign debt — 4 — — 4 5 13,510 2,970 — 16,485 Other securities 59 — — — 59 Loans held for sale — 1,198 — — 1,198 Loans held for investment — 71 23 — 94 MSRs — — 210 — 210 Other assets: Derivative assets — 1,903 43 (889) 1,057 Assets held in trust for deferred compensation plans 73 — — — 73 Liabilities Other liabilities: Derivative liabilities — 1,031 2 (917) 116 (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	The following tables present a rollforward of the balance sheet amounts for the three-month and nine-month periods ended September 30, 2021 and 2020, 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 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- Asset-backed securities Opening balance $ 327 $ 23 $ 3,609 $ 18 $ 46 $ 21 Transfers out of Level 3 (1) — (39) — — — — Total gains/losses for the period: Included in earnings 1 28 (1) — — — Included in OCI — — (8) — — — Purchases/originations 31 — 260 — — — Sales — — (17) — — — Repayments — — — — — (1) Settlements (21) — (261) — (11) — Closing balance $ 338 $ 12 $ 3,582 $ 18 $ 35 $ 20 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 1 $ (12) $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — (10) — — — Level 3 Fair Value Measurements MSRs Derivative instruments Available-for-sale securities Loans held for investment (dollar amounts in millions) Municipal securities Private- label CMO Asset-backed securities Opening balance $ 172 $ 40 $ 3,102 $ 5 $ 56 $ 25 Transfers out of Level 3 (1) — (64) — — — — Total gains/losses for the period: Included in earnings 19 72 (1) — — — Included in OCI — — 60 — — — Purchases/originations — — 154 — — — Repayments — — — — — (1) Settlements — — (226) — (7) — Closing balance $ 191 $ 48 $ 3,089 $ 5 $ 49 $ 24 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 18 $ 8 $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — 62 — — — Level 3 Fair Value Measurements Nine Months Ended September 30, 2021 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- label CMO Asset-backed securities Opening balance $ 210 $ 41 $ 2,951 $ 9 $ 10 $ 23 Transfers out of Level 3 (1) — (109) — — — — Total gains/losses for the period: Included in earnings 27 73 (1) — — — Included in OCI — — (13) — — — Purchases/originations/acquisitions 162 7 1,613 8 75 — Sales — — (369) — — — Repayments — — — — — (3) Settlements (61) — (599) 1 (50) — Closing balance $ 338 $ 12 $ 3,582 $ 18 $ 35 $ 20 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 27 $ (33) $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — (14) — — — Level 3 Fair Value Measurements Nine Months Ended September 30, 2020 Available-for-sale securities Loans held for investment (dollar amounts in millions) MSRs Derivative instruments Municipal securities Private- label CMO Asset- backed securities Opening balance $ 7 $ 6 $ 2,999 $ 2 $ 48 $ 26 Fair value election for servicing assets previously measured using the amortized method 205 — — — — — Transfers out of Level 3 (1) — (139) — — — — Total gains/losses for the period: Included in earnings (21) 181 (2) — — — Included in OCI — — 61 — — — Purchases/originations — — 491 3 28 — Repayments — — — — — (2) Settlements — — (460) — (27) — Closing balance $ 191 $ 48 $ 3,089 $ 5 $ 49 $ 24 Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ (22) $ 42 $ — $ — $ — $ — Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period — — 64 — — — — (1) Transfers out of Level 3 represent the settlement value of the derivative instruments (i.e. interest rate lock agreements) that are transferred to loans held for sale, which is classified as Level 2.
Classification of gains and losses due to changes in fair value, recorded in earnings for Level 3 assets and liabilities	The following tables 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, 2021 and 2020: Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 1 $ 28 $ — Interest and fee income — — (1) Total $ 1 $ 28 $ (1) Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 19 $ 72 $ — Interest and fee income — — (1) Total $ 19 $ 72 $ (1) Level 3 Fair Value Measurements (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ 27 $ 73 $ — Interest and fee income — — (1) Total $ 27 $ 73 $ (1) Level 3 Fair Value Measurements Available-for-sale securities (dollar amounts in millions) MSRs Derivative instruments Municipal securities Classification of gains and losses in earnings: Mortgage banking income $ (21) $ 181 $ — Interest and fee income — — (2) Total $ (21) $ 181 $ (2)
Assets and liabilities under the fair value option	The following tables present the fair value and aggregate principal balance of certain assets and liabilities under the fair value option: September 30, 2021 (dollar amounts in millions) Total Loans Loans that are 90 or more days past due Assets Fair value carrying amount Aggregate unpaid principal Difference Fair value carrying amount Aggregate unpaid principal Difference Loans held for sale $ 1,297 $ 1,260 $ 37 $ — $ — $ — Loans held for investment 139 143 (4) 3 4 (1) December 31, 2020 (dollar amounts in millions) Total Loans Loans that are 90 or more days past due Assets Fair value carrying amount Aggregate unpaid principal Difference Fair value carrying amount Aggregate unpaid principal Difference Loans held for sale $ 1,198 $ 1,134 $ 64 $ 2 $ 2 $ — Loans held for investment 94 99 (5) 7 8 (1) The following table present the net gains (losses) from fair value changes for the three-month and nine-month periods ended September 30, 2021 and 2020. Net gains (losses) from fair value changes (dollar amounts in millions) Three Months Ended September 30, Nine Months Ended September 30, Assets 2021 2020 2021 2020 Loans held for sale (1) $ (4) $ 13 $ (30) $ 35 (1) The net gains (losses) from fair value changes are included in Mortgage banking income on the Unaudited Condensed Consolidated Statements of Income.
Assets measured at fair value on a nonrecurring basis	The amounts measured at fair value on a nonrecurring basis at September 30, 2021 were as follows: Fair Value Measurements Using Total (dollar amounts in millions) Fair Value Quoted Prices Significant Significant Collateral-dependent loans $ 18 $ — $ — $ 18 $ (2) Loans held for sale — — — — 1
Quantitative information about significant unobservable level 3 fair value measurement inputs	Quantitative Information about Level 3 Fair Value Measurements at September 30, 2021 (1) (dollar amounts in millions) Fair Value Valuation Technique Significant Unobservable Input Range Weighted Average Measured at fair value on a recurring basis: MSRs $ 338 Discounted cash flow Constant prepayment rate 8 % - 21% 12 % Spread over forward interest rate swap rates 3 % - 11% 5 % Derivative assets 19 Consensus Pricing Net market price (4) % - 10% 1 % Estimated pull through % 6 % - 100% 90 % Municipal securities 3,582 Discounted cash flow Discount rate — % - 2% 1 % Asset-backed securities 35 Cumulative default — % - 64% 5 % Loss given default 5 % - 90% 24 % Measured at fair value on a nonrecurring basis: Collateral-dependent loans 18 Appraisal value N/A N/A Quantitative Information about Level 3 Fair Value Measurements at December 31, 2020 (1) (dollar amounts in millions) Fair Value Valuation Technique Significant Unobservable Input Range Weighted Average Measured at fair value on a recurring basis: MSRs $ 210 Discounted cash flow Constant prepayment rate 8 % - 24% 17 % Spread over forward interest rate swap rates 4 % - 11% 5 % Derivative assets 43 Consensus Pricing Net market price (4) % - 11% 3 % Estimated pull through % 1 % - 100% 88 % Municipal securities 2,951 Discounted cash flow Discount rate — % 1% 1 % Asset-backed securities 10 Cumulative default — % 39% 4 % Loss given default 5 % 80% 25 % Measured at fair value on a nonrecurring basis: Collateral-dependent loans 144 Appraisal value N/A NA (1) Certain disclosures related to quantitative level 3 fair value measurements do not include those deemed to be immaterial.
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 at September 30, 2021 and December 31, 2020: September 30, 2021 (dollar amounts in millions) Amortized Cost Lower of Cost or Market Fair Value or Fair Value Option Total Carrying Amount Estimated Fair Value Financial Assets Cash and short-term assets $ 10,188 $ — $ — $ 10,188 $ 10,188 Trading account securities — — 77 77 77 Available-for-sale securities — — 25,654 25,654 25,654 Held-to-maturity securities 12,455 — — 12,455 12,619 Other securities 563 — 86 649 649 Loans held for sale — 38 1,297 1,335 1,335 Net loans and leases (1) 108,321 — 139 108,460 108,385 Derivative assets — — 900 900 900 Assets held in trust for deferred compensation plans — — 151 151 151 Financial Liabilities Deposits 141,898 — — 141,898 142,261 Short-term borrowings 435 — — 435 435 Long-term debt 7,779 — — 7,779 7,908 Derivative liabilities — — 250 250 250 December 31, 2020 (dollar amounts in millions) Amortized Cost Lower of Cost or Market Fair Value or Fair Value Option Total Carrying Amount Estimated Fair Value Financial Assets Cash and short-term assets $ 6,712 $ — $ — $ 6,712 $ 6,712 Trading account securities — — 62 62 62 Available-for-sale securities — — 16,485 16,485 16,485 Held-to-maturity securities 8,861 — — 8,861 9,255 Other securities 359 — 59 418 418 Loans held for sale — 77 1,198 1,275 1,275 Net loans and leases (1) 79,700 — 94 79,794 80,477 Derivative assets — — 1,057 1,057 1,057 Assets held in trust for deferred compensation plans — — 73 73 73 Financial Liabilities Deposits 98,948 — — 98,948 99,021 Short-term borrowings 183 — — 183 183 Long-term debt 8,352 — — 8,352 8,568 Derivative liabilities — — 116 116 116 (1) Includes collateral-dependent loans. The following table presents the level in the fair value hierarchy for the estimated fair values at September 30, 2021 and December 31, 2020: Estimated Fair Value Measurements at Reporting Date Using Netting Adjustments (1) September 30, 2021 (dollar amounts in millions) Level 1 Level 2 Level 3 Financial Assets Trading account securities $ — $ 77 $ — $ 77 Available-for-sale securities 5 22,014 3,635 25,654 Held-to-maturity securities — 12,619 — 12,619 Other securities (2) 62 24 — 86 Loans held for sale — 1,297 38 1,335 Net loans and direct financing leases — 119 108,266 108,385 Derivative assets — 1,567 19 $ (686) 900 Financial Liabilities Deposits — 137,142 5,119 142,261 Short-term borrowings — 435 — 435 Long-term debt — 7,147 761 7,908 Derivative liabilities — 1,056 7 (813) 250 Estimated Fair Value Measurements at Reporting Date Using Netting Adjustments (1) December 31, 2020 (dollar amounts in millions) Level 1 Level 2 Level 3 Financial Assets Trading account securities $ — $ 62 $ — $ 62 Available-for-sale securities 5 13,510 2,970 16,485 Held-to-maturity securities — 9,255 — 9,255 Other securities (2) 59 — — 59 Loans held for sale — 1,198 77 1,275 Net loans and direct financing leases — 71 80,406 80,477 Derivative assets — 1,903 43 $ (889) 1,057 Financial Liabilities Deposits — 96,656 2,365 99,021 Short-term borrowings — 183 — 183 Long-term debt — 7,999 569 8,568 Derivative liabilities — 1,031 2 (917) 116 (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. (2) Excludes securities without readily determinable fair values.

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Asset and liability derivatives included in accrued income and other assets	September 30, 2021 December 31, 2020 (dollar amounts in millions) Notional Value Asset Liability Notional Value Asset Liability Derivatives designated as Hedging Instruments Interest rate contracts $ 20,053 $ 413 $ 12 $ 27,056 $ 719 $ 51 Foreign exchange contracts 209 — — — — — Derivatives not designated as Hedging Instruments Interest rate contracts 54,089 772 665 44,495 1,074 828 Foreign exchange contracts 3,568 35 30 2,718 46 47 Commodities contracts 1,255 353 351 1,952 107 103 Equity contracts 705 13 5 517 — 4 Total Contracts $ 79,879 $ 1,586 $ 1,063 $ 76,738 $ 1,946 $ 1,033
Gains and (losses) recognized in other comprehensive income (loss) (OCI) for derivatives designated as effective cash flow hedges	The following table presents the amount of gain or loss recognized in income for derivatives not designated as hedging instruments under ASC Subtopic 815-10 in the Unaudited Condensed Consolidated Income Statement for the three-month and nine-month periods ended September 30, 2021 and 2020, respectively. Location of Gain or (Loss) Recognized in Income on Derivative Amount of Gain or (Loss) Recognized in Income on Derivative Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Interest rate contracts: Customer Capital markets fees $ 13 $ 10 $ 37 $ 39 Mortgage banking Mortgage banking income 5 47 (24) 109 Interest rate floors Interest and fee income on loans and leases (4) — (8) — Interest rate caps Interest expense on long-term debt — — 89 — Foreign exchange contracts Capital markets fees 9 7 22 18 Commodities contracts Capital markets fees (1) — (1) 2 Equity contracts Other noninterest expense (2) (1) (6) (3) Total $ 20 $ 63 $ 109 $ 165
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, 2021 and December 31, 2020, identified by the underlying interest rate-sensitive instruments. September 30, 2021 (dollar amounts in millions) Fair Value Hedges Cash Flow Hedges Economic Hedges Total Instruments associated with: Investment securities $ 7,372 $ — $ — $ 7,372 Loans — 7,925 271 8,196 Long-term debt 4,756 — — 4,756 Total notional value at September 30, 2021 $ 12,128 $ 7,925 $ 271 $ 20,324 December 31, 2020 (dollar amounts in millions) Fair Value Hedges Cash Flow Hedges Economic Hedges Total Instruments associated with: Investment securities $ 3,484 $ — $ — $ 3,484 Loans — 17,375 1,271 18,646 Long-term debt 6,197 — 5,000 11,197 Total notional value at December 31, 2020 $ 9,681 $ 17,375 $ 6,271 $ 33,327
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, 2021 and 2020. Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Interest rate contracts Change in fair value of interest rate swaps hedging investment securities (1) $ 2 $ — $ 39 $ (1) Change in fair value of hedged investment securities (1) — — (40) 1 Change in fair value of interest rate swaps hedging long-term debt (2) (22) (36) (95) 159 Change in fair value of hedged long term debt (2) 22 35 96 (160) (1) Recognized in Interest income—available-for-sale securities—taxable in the Unaudited Condensed Consolidated Statements of Income (2) Recognized in Interest expense—long-term debt in the Unaudited Condensed Consolidated Statements of Income .
Amounts recorded on the balance sheet related to cumulative basis adjustments	As of September 30, 2021, and December 31, 2020, the following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items (dollar amounts in millions) September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 Assets Investment securities (1) $ 17,630 $ 6,637 $ 2 $ 3 Liabilities Long-term debt 4,882 6,383 135 232 (1) Amounts include the amortized cost basis of closed portfolios used to designate hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. As of September 30, 2021, the amortized cost basis of the closed portfolios used in these hedging relationships was $17.2 billion, the cumulative basis adjustments associated with these hedging relationships was $1 million, and the amounts of the designated hedging instruments were $7.0 billion.
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, 2021 and December 31, 2020. Offsetting of Financial Assets and Derivative Assets Gross amounts Net amounts of Gross amounts not offset in the (dollar amounts in millions) Gross amounts of recognized assets Financial instruments Cash collateral received Net amount September 30, 2021 $ 1,586 $ (686) $ 900 $ (81) $ (61) $ 758 December 31, 2020 1,946 (889) 1,057 (112) (142) 803
MSR Derivative Hedging	The notional value of the derivative financial instruments, the corresponding net asset (liability) position recognized in other assets and/or other liabilities, and net trading gains (losses) related to MSR hedging activity is summarized in the following table: (dollar amounts in millions) September 30, December 31, Notional value $ 1,153 $ 1,170 Trading assets 17 43 Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Trading gains $ (4) $ (1) $ (28) $ 61
Offsetting of financial liabilities and derivative liabilities	Offsetting of Financial Liabilities and Derivative Liabilities Gross amounts offset in the unaudited condensed consolidated balance sheets Net amounts of liabilities presented in the unaudited condensed consolidated balance sheets Gross amounts not offset in the unaudited condensed consolidated balance sheets (dollar amounts in millions) Gross amounts of recognized liabilities Financial instruments Cash collateral delivered Net amount September 30, 2021 $ 1,063 $ (813) $ 250 $ — $ (225) $ 25 December 31, 2020 1,033 (917) 116 (9) (105) 2

VIEs (Tables)

VIEs (Tables)	9 Months Ended
	Sep. 30, 2021
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 in, but is not the primary beneficiary, of the VIE at September 30, 2021, and December 31, 2020: September 30, 2021 (dollar amounts in millions) Total Assets Total Liabilities Maximum Exposure to Loss Trust Preferred Securities $ 14 $ 256 $ — Affordable Housing Tax Credit Partnerships 1,436 774 1,436 Other Investments 426 145 426 Total $ 1,876 $ 1,175 $ 1,862 December 31, 2020 (dollar amounts in millions) Total Assets Total Liabilities Maximum Exposure to Loss Trust Preferred Securities $ 14 $ 252 $ — Affordable Housing Tax Credit Partnerships 956 500 956 Other Investments 308 72 308 Total $ 1,278 $ 824 $ 1,264
Capital Securities Issued By Unconsolidated Subsidiaries	A list of trust preferred securities outstanding at September 30, 2021 follows: (dollar amounts in millions) Rate Principal amount of subordinated note/ debenture issued to trust (1) Investment in unconsolidated subsidiary Huntington Capital I 0.83 % (2) $ 70 $ 7 Huntington Capital II 0.76 (3) 32 3 Sky Financial Capital Trust III 1.53 (4) 72 2 Sky Financial Capital Trust IV 1.53 (4) 74 2 First Place Capital Trust I 3.00 (5) 4 — First Place Capital Trust II 6.45 4 — Total $ 256 $ 14 (1) Represents the principal amount of debentures issued to each trust, including unamortized original issue discount. (2) Variable effective rate at September 30, 2021, based on three-month LIBOR +0.70%. (3) Variable effective rate at September 30, 2021, based on three-month LIBOR +0.625%. (4) Variable effective rate at September 30, 2021, based on three-month LIBOR +1.40%. (5) Variable effective rate at September 30, 2021, based on three-month LIBOR +2.85%.
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, 2021 and December 31, 2020. (dollar amounts in millions) September 30, December 31, Affordable housing tax credit investments $ 2,134 $ 1,568 Less: amortization (698) (612) Net affordable housing tax credit investments $ 1,436 $ 956 Unfunded commitments $ 774 $ 500 The following table presents other information relating to Huntington’s affordable housing tax credit investments for the three-month and nine-month periods ended September 30, 2021 and 2020. Three Months Ended Nine Months Ended (dollar amounts in millions) 2021 2020 2021 2020 Tax credits and other tax benefits recognized $ 36 $ 29 $ 113 $ 88 Proportional amortization expense included in provision for income taxes 34 25 92 75

COMMITMENTS AND CONTINGENT LI_2

COMMITMENTS AND CONTINGENT LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2021
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, 2021 and December 31, 2020, were as follows: (dollar amounts in millions) September 30, December 31, Contract amount representing credit risk Commitments to extend credit: Commercial $ 28,226 $ 20,701 Consumer 18,982 14,808 Commercial real estate 2,576 1,313 Standby letters of credit and guarantees on industrial revenue bonds 904 581 Commercial letters of credit 15 21

SEGMENT REPORTING (Tables)

SEGMENT REPORTING (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Three Months Ended September 30, Income Statements Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated (dollar amounts in millions) 2021 Net interest income $ 483 $ 416 $ 123 $ 42 $ 96 $ 1,160 Provision for credit losses (7) (34) (25) 4 — (62) Noninterest income 302 150 4 58 21 535 Noninterest expense 637 247 48 84 273 1,289 Provision (benefit) for income taxes 33 73 22 3 (41) 90 Income attributable to non-controlling interest — 1 — — — 1 Net income (loss) attributable to Huntington Bancshares Inc $ 122 $ 279 $ 82 $ 9 $ (115) $ 377 2020 Net interest income $ 367 $ 221 $ 110 $ 39 $ 80 $ 817 Provision for credit losses 87 87 (12) 15 — 177 Noninterest income 274 90 2 47 17 430 Noninterest expense 450 135 34 56 37 712 Provision (benefit) for income taxes 22 19 19 3 (8) 55 Income attributable to non-controlling interest — — — — — — Net income attributable to Huntington Bancshares Inc $ 82 $ 70 $ 71 $ 12 $ 68 $ 303 Nine months ended September 30, Income Statements Consumer & Business Banking Commercial Banking Vehicle Finance RBHPCG Treasury / Other Huntington Consolidated (dollar amounts in millions) 2021 Net interest income $ 1,187 $ 873 $ 340 $ 113 $ 457 $ 2,970 Provision for credit losses 57 107 (77) 2 — 89 Noninterest income 780 353 9 165 67 1,374 Noninterest expense 1,617 553 119 217 648 3,154 Provision (benefit) for income taxes 62 119 64 12 (51) 206 Income attributable to non-controlling interest — 1 — — — 1 Net income (loss) attributable to Huntington Bancshares Inc $ 231 $ 446 $ 243 $ 47 $ (73) $ 894 2020 Net interest income $ 1,099 $ 693 $ 316 $ 122 $ 169 $ 2,399 Provision for credit losses 200 611 118 16 — 945 Noninterest income 704 261 7 151 59 1,182 Noninterest expense 1,288 400 103 181 67 2,039 Provision (benefit) for income taxes 66 (12) 21 16 5 96 Income attributable to non-controlling interest — — — — — — Net income (loss) attributable to Huntington Bancshares Inc $ 249 $ (45) $ 81 $ 60 $ 156 $ 501
Segment Disclosure of Assets and Deposits	Assets at Deposits at (dollar amounts in millions) September 30, December 31, September 30, December 31, Consumer & Business Banking $ 41,656 $ 30,758 $ 94,439 $ 60,910 Commercial Banking 54,671 36,311 32,531 24,766 Vehicle Finance 20,122 19,789 1,437 722 RBHPCG 8,114 7,064 9,025 7,635 Treasury / Other 49,315 29,116 4,466 4,915 Total $ 173,878 $ 123,038 $ 141,898 $ 98,948

ACQUISITION OF TCF FINANCIAL _3

ACQUISITION OF TCF FINANCIAL CORPORATION - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Jun. 09, 2021	Sep. 30, 2021	Dec. 31, 2020
Assets acquired:
Loans and leases - UPB	$ 33,773
Loans and leases - fair value	33,156
Goodwill		$ 5,316	$ 1,990
Business Combination, Consideration Transferred [Abstract]
Goodwill		$ 5,316	$ 1,990
Commercial
Assets acquired:
Loans and leases - UPB	23,780
Loans and leases - fair value	23,222
Commercial | Commercial and industrial
Assets acquired:
Loans and leases - UPB	12,726
Loans and leases - fair value	12,441
Commercial | Commercial Real Estate
Assets acquired:
Loans and leases - UPB	8,125
Loans and leases - fair value	7,869
Commercial | Financing Lease
Assets acquired:
Loans and leases - UPB	2,929
Loans and leases - fair value	2,912
Consumer
Assets acquired:
Loans and leases - UPB	9,993
Loans and leases - fair value	9,934
Consumer | Automobile
Assets acquired:
Loans and leases - UPB	322
Loans and leases - fair value	317
Consumer | Residential Mortgage
Assets acquired:
Loans and leases - UPB	6,267
Loans and leases - fair value	6,273
Consumer | Home equity
Assets acquired:
Loans and leases - UPB	2,644
Loans and leases - fair value	2,607
Consumer | RV and marine finance
Assets acquired:
Loans and leases - UPB	581
Loans and leases - fair value	570
Consumer | Consumer
Assets acquired:
Loans and leases - UPB	179
Loans and leases - fair value	167
TCF Financial Corporation
Assets acquired:
Cash and due from banks	466
Interest-bearing deposits at Federal Reserve Bank	719
Interest-bearing deposits in banks	312
Available-for-sale securities	8,900
Other securities	358
Loans held for sale	363
Bank owned life insurance	181
Premises and equipment	360
Goodwill	3,326
Intangible assets	157
Other assets	1,441
Total assets acquired	46,413
Liabilities assumed:
Deposits	38,663
Short-term borrowings	1,306
Long-term debt	1,516
Other liabilities	1,049
Total liabilities	42,534
Non-controlling interest	22
Net assets acquired	3,857
Business Combination, Consideration Transferred [Abstract]
Value of transaction	7,183
Goodwill	3,326
TCF Financial Corporation | Common Stock
Business Combination, Consideration Transferred [Abstract]
Consideration transferred, equity interest issued and issuable	6,998
TCF Financial Corporation | Preferred Stock
Business Combination, Consideration Transferred [Abstract]
Consideration transferred, equity interest issued and issuable	185
TCF Financial Corporation | Core deposit intangible
Assets acquired:
Intangible assets	92
TCF Financial Corporation | Other Intangible assets
Assets acquired:
Intangible assets	6
TCF Financial Corporation | Servicing rights
Assets acquired:
Intangible assets	$ 59

ACQUISITION OF TCF FINANCIAL _4

ACQUISITION OF TCF FINANCIAL CORPORATION - PCD Loans (Details) - TCF Financial Corporation $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Business Acquisition [Line Items]
Par value (UPB)	$ 9,264
ALLL at acquisition	(432)
Non-credit (discount)	(287)
Fair value	8,545
Commercial
Business Acquisition [Line Items]
Par value (UPB)	7,931
ALLL at acquisition	(374)
Non-credit (discount)	(219)
Fair value	7,338
Consumer
Business Acquisition [Line Items]
Par value (UPB)	1,333
ALLL at acquisition	(58)
Non-credit (discount)	(68)
Fair value	$ 1,207

ACQUISITION OF TCF FINANCIAL _5

ACQUISITION OF TCF FINANCIAL CORPORATION - Pro Forma (Details) - TCF Financial Corporation - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)	$ 377	$ 364	$ 1,268	$ 433
Interest and dividend income operating [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	1,160	1,197	3,625	3,581
Noninterest income [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 535	$ 554	$ 1,604	$ 1,586

ACQUISITION OF TCF FINANCIAL _6

ACQUISITION OF TCF FINANCIAL CORPORATION - Narrative (Details) $ in Millions	Sep. 17, 2021USD ($)bankingCenter	Jun. 09, 2021USD ($)	Jun. 09, 2021USD ($)	Jun. 09, 2021USD ($)Rate	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)Rate	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Business Acquisition [Line Items]
Goodwill					$ 5,316		$ 5,316		$ 1,990
Noninterest Expense					1,289	$ 712	$ 3,154	$ 2,039
Series C Non-Cumulative Perpetual Preferred Stock
Business Acquisition [Line Items]
Preferred Stock, Dividend Rate, Percentage | Rate							5.875%
TCF Financial Corporation
Business Acquisition [Line Items]
Value of transaction		$ 7,183
Goodwill		3,326	$ 3,326	$ 3,326
TCF Financial Corporation | Branches Sold In Connection with Acquisition of TCF Financial Corporation | Held-for-sale
Business Acquisition [Line Items]
Number of Branches to be Disposed | bankingCenter	14
Deposits classified as held-for-sale	$ 847
Loans classified as held-for-sale	$ 209
TCF Financial Corporation | Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Noninterest Expense					$ 234		$ 524
TCF Financial Corporation | Common Stock
Business Acquisition [Line Items]
Share issuance ratio			3.0028
TCF Financial Corporation | Newly created series of preferred stock
Business Acquisition [Line Items]
Share issuance ratio			1
TCF Financial Corporation | Common Stock
Business Acquisition [Line Items]
Consideration transferred, equity interest issued and issuable		6,998
TCF Financial Corporation | Preferred Stock
Business Acquisition [Line Items]
Consideration transferred, equity interest issued and issuable		$ 185
TCF Financial Corporation | Core deposit intangible
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life							10 years
TCF Financial Corporation | Series C Non-Cumulative Perpetual Preferred Stock
Business Acquisition [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.70%	5.70%

INVESTMENT SECURITIES AND OTH_3

INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale securities:
Total available-for-sale securities	$ 25,653,000,000	$ 16,175,000,000
Gross Gains	212,000,000	344,000,000
Gross Losses	(211,000,000)	(34,000,000)
Fair Value	25,654,000,000	16,485,000,000
Held-to-maturity securities:
Total held-to-maturity securities	12,455,000,000	8,861,000,000
Gross Gains	202,000,000	394,000,000
Gross Losses	(38,000,000)	0
Fair Value	12,619,000,000	9,255,000,000
Other securities, cost	649,000,000	417,000,000
Other securities, fair value	649,000,000	418,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax	0	1,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax	0	0
Available-for-sale Securities [Member]
Held-to-maturity securities:
Financing Receivable, Accrued Interest, before Allowance for Credit Loss	60,000,000	32,000,000
Held-to-maturity Securities [Member]
Held-to-maturity securities:
Financing Receivable, Accrued Interest, before Allowance for Credit Loss	26,000,000	20,000,000
U.S. Treasury
Available-for-sale securities:
Total available-for-sale securities	5,000,000	5,000,000
Gross Gains	0	0
Gross Losses	0	0
Fair Value	5,000,000	5,000,000
Residential CMO
Available-for-sale securities:
Total available-for-sale securities	3,683,000,000	3,550,000,000
Gross Gains	63,000,000	121,000,000
Gross Losses	(12,000,000)	(5,000,000)
Fair Value	3,734,000,000	3,666,000,000
Held-to-maturity securities:
Total held-to-maturity securities	2,701,000,000	1,779,000,000
Gross Gains	56,000,000	88,000,000
Gross Losses	(4,000,000)	0
Fair Value	2,753,000,000	1,867,000,000
Residential MBS
Available-for-sale securities:
Total available-for-sale securities	14,413,000,000	7,843,000,000
Gross Gains	47,000,000	97,000,000
Gross Losses	(123,000,000)	(5,000,000)
Fair Value	14,337,000,000	7,935,000,000
Held-to-maturity securities:
Total held-to-maturity securities	7,079,000,000	3,715,000,000
Gross Gains	62,000,000	103,000,000
Gross Losses	(33,000,000)	0
Fair Value	7,108,000,000	3,818,000,000
Commercial MBS
Available-for-sale securities:
Total available-for-sale securities	1,522,000,000	1,151,000,000
Gross Gains	11,000,000	21,000,000
Gross Losses	(35,000,000)	(9,000,000)
Fair Value	1,498,000,000	1,163,000,000
Held-to-maturity securities:
Total held-to-maturity securities	2,468,000,000	3,118,000,000
Gross Gains	77,000,000	191,000,000
Gross Losses	(1,000,000)	0
Fair Value	2,544,000,000	3,309,000,000
Other agencies
Available-for-sale securities:
Total available-for-sale securities	263,000,000	60,000,000
Gross Gains	1,000,000	2,000,000
Gross Losses	0	0
Fair Value	264,000,000	62,000,000
Held-to-maturity securities:
Total held-to-maturity securities	205,000,000	246,000,000
Gross Gains	7,000,000	12,000,000
Gross Losses	0	0
Fair Value	212,000,000	258,000,000
Total U.S. Treasury, federal agency and other agency securities
Available-for-sale securities:
Total available-for-sale securities	19,886,000,000	12,609,000,000
Gross Gains	122,000,000	241,000,000
Gross Losses	(170,000,000)	(19,000,000)
Fair Value	19,838,000,000	12,831,000,000
Held-to-maturity securities:
Total held-to-maturity securities	12,453,000,000	8,858,000,000
Gross Gains	202,000,000	394,000,000
Gross Losses	(38,000,000)	0
Fair Value	12,617,000,000	9,252,000,000
Municipal securities
Available-for-sale securities:
Total available-for-sale securities	3,570,000,000	2,928,000,000
Gross Gains	82,000,000	91,000,000
Gross Losses	(18,000,000)	(15,000,000)
Fair Value	3,634,000,000	3,004,000,000
Held-to-maturity securities:
Total held-to-maturity securities	2,000,000	3,000,000
Gross Gains	0	0
Gross Losses	0	0
Fair Value	2,000,000	3,000,000
Private-label CMO
Available-for-sale securities:
Total available-for-sale securities	120,000,000	9,000,000
Gross Gains	0	0
Gross Losses	0	0
Fair Value	120,000,000	9,000,000
Asset-backed securities
Available-for-sale securities:
Total available-for-sale securities	284,000,000	185,000,000
Gross Gains	3,000,000	7,000,000
Gross Losses	(2,000,000)	0
Fair Value	285,000,000	192,000,000
Corporate debt
Available-for-sale securities:
Total available-for-sale securities	1,789,000,000	440,000,000
Gross Gains	5,000,000	5,000,000
Gross Losses	(21,000,000)	0
Fair Value	1,773,000,000	445,000,000
Other securities/Sovereign debt
Available-for-sale securities:
Total available-for-sale securities	4,000,000	4,000,000
Gross Gains	0	0
Gross Losses	0	0
Fair Value	4,000,000	4,000,000
Mutual funds
Held-to-maturity securities:
Other securities, cost	62,000,000	50,000,000
Other securities, fair value	62,000,000	50,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax	0	0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax	0	0
Equity securities
Held-to-maturity securities:
Other securities, cost	24,000,000	8,000,000
Other securities, fair value	24,000,000	9,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax	0	1,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax	0	0
Federal Home Loan Bank stock | Non-marketable equity securities:
Held-to-maturity securities:
Other securities, cost	52,000,000	60,000,000
Other securities, fair value	52,000,000	60,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax	0	0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax	0	0
Federal Reserve Bank stock | Non-marketable equity securities:
Held-to-maturity securities:
Other securities, cost	511,000,000	299,000,000
Other securities, fair value	511,000,000	299,000,000
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax	0	0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax	$ 0	$ 0

INVESTMENT SECURITIES AND OTH_4

INVESTMENT SECURITIES AND OTHER SECURITIES - Contractual Maturities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale securities, amortized cost:
Under 1 year	$ 354	$ 308
After 1 year through 5 years	1,665	1,145
After 5 years through 10 years	2,935	1,607
After 10 years	20,699	13,115
Total available-for-sale securities	25,653	16,175
Available-for-sale securities, fair value:
Under 1 year	351	304
After 1 year through 5 years	1,668	1,154
After 5 years through 10 years	2,962	1,654
After 10 years	20,673	13,373
Total available-for-sale securities	25,654	16,485
Held-to-maturity securities, amortized cost:
After 1 year through 5 years	80	160
After 5 years through 10 years	70	131
After 10 years	12,305	8,570
Total held-to-maturity securities	12,455	8,861
Held-to-maturity securities, fair value:
After 1 year through 5 years	83	169
After 5 years through 10 years	72	138
After 10 years	12,464	8,948
Total held-to-maturity securities	$ 12,619	$ 9,255

INVESTMENT SECURITIES AND OTH_5

INVESTMENT SECURITIES AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale securities:
Less than 12 months, fair value	$ 14,062	$ 2,432
Less than 12 months, gross unrealized losses	(190)	(22)
12 months or longer, fair value	557	490
12 months or longer, gross unrealized losses	(21)	(12)
Total, fair value	14,619	2,922
Total, gross unrealized losses	(211)	(34)
Held-to-maturity securities:
Less than 12 months, fair value	5,701
Less than 12 months, gross unrealized losses	(38)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	5,701
Total, gross unrealized losses	(38)
Residential CMO
Available-for-sale securities:
Less than 12 months, fair value	1,064	302
Less than 12 months, gross unrealized losses	(7)	(5)
12 months or longer, fair value	120	0
12 months or longer, gross unrealized losses	(5)	0
Total, fair value	1,184	302
Total, gross unrealized losses	(12)	(5)
Held-to-maturity securities:
Less than 12 months, fair value	1,032
Less than 12 months, gross unrealized losses	(4)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	1,032
Total, gross unrealized losses	(4)
Residential MBS
Available-for-sale securities:
Less than 12 months, fair value	10,212	1,633
Less than 12 months, gross unrealized losses	(123)	(5)
12 months or longer, fair value	0	0
12 months or longer, gross unrealized losses	0	0
Total, fair value	10,212	1,633
Total, gross unrealized losses	(123)	(5)
Held-to-maturity securities:
Less than 12 months, fair value	4,398
Less than 12 months, gross unrealized losses	(33)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	4,398
Total, gross unrealized losses	(33)
Commercial MBS
Available-for-sale securities:
Less than 12 months, fair value	900	321
Less than 12 months, gross unrealized losses	(31)	(9)
12 months or longer, fair value	25	0
12 months or longer, gross unrealized losses	(4)	0
Total, fair value	925	321
Total, gross unrealized losses	(35)	(9)
Held-to-maturity securities:
Less than 12 months, fair value	271
Less than 12 months, gross unrealized losses	(1)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	271
Total, gross unrealized losses	(1)
Other agencies
Available-for-sale securities:
Less than 12 months, fair value	119
Less than 12 months, gross unrealized losses	0
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	119
Total, gross unrealized losses	0
Total U.S. Treasury, federal agency and other agency securities
Available-for-sale securities:
Less than 12 months, fair value	12,295	2,256
Less than 12 months, gross unrealized losses	(161)	(19)
12 months or longer, fair value	145	0
12 months or longer, gross unrealized losses	(9)	0
Total, fair value	12,440	2,256
Total, gross unrealized losses	(170)	(19)
Held-to-maturity securities:
Less than 12 months, fair value	5,701
Less than 12 months, gross unrealized losses	(38)
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	5,701
Total, gross unrealized losses	(38)
Municipal securities
Available-for-sale securities:
Less than 12 months, fair value	339	110
Less than 12 months, gross unrealized losses	(8)	(3)
12 months or longer, fair value	377	490
12 months or longer, gross unrealized losses	(10)	(12)
Total, fair value	716	600
Total, gross unrealized losses	(18)	(15)
Private-label CMO
Available-for-sale securities:
Less than 12 months, fair value	58
Less than 12 months, gross unrealized losses	0
12 months or longer, fair value	0
12 months or longer, gross unrealized losses	0
Total, fair value	58
Total, gross unrealized losses	0
Asset-backed securities
Available-for-sale securities:
Less than 12 months, fair value	186	15
Less than 12 months, gross unrealized losses	(1)	0
12 months or longer, fair value	7	0
12 months or longer, gross unrealized losses	(1)	0
Total, fair value	193	15
Total, gross unrealized losses	(2)	0
Corporate debt
Available-for-sale securities:
Less than 12 months, fair value	1,184	51
Less than 12 months, gross unrealized losses	(20)	0
12 months or longer, fair value	28	0
12 months or longer, gross unrealized losses	(1)	0
Total, fair value	1,212	51
Total, gross unrealized losses	$ (21)	$ 0

INVESTMENT SECURITIES AND OTH_6

INVESTMENT SECURITIES AND OTHER SECURITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities		$ 23,200		$ 14,400
Transfer of securities from available-for-sale to held-to-maturity	$ 3,000	$ 3,007	$ 1,520
Unrealized Net Losses Recognized In OCI At Time Of Transfer Of Available For Sale Securities Transferred To Held To Maturity Securities	$ 2

LOANS _ LEASES - Narrative (Det

LOANS / LEASES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable net premium	$ (85)		$ (85)		$ 171
Residual Value of Leased Asset	463		463		93
Direct Financing Lease, Interest Income	73	$ 26	154	$ 81
Loans and Leases Receivable, Collateral for Secured Borrowings	$ 45,900		$ 45,900		$ 43,000

LOANS _ LEASES - Loan and Lease

LOANS / LEASES - Loan and Lease Portfolio Composition (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	[1]	$ 110,567	$ 81,608
Allowance for loan and lease losses		(2,107)	(1,814)
Net loans and leases		108,460	79,794
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		40,452	33,151
Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		13,305	12,778
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		10,919	8,894
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		18,922	12,141
RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		5,052	4,190
Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		2,232	1,033
Financing Lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		4,991	2,222
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		50,430	39,036
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		13,305	12,778
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		10,919	8,894
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		18,922	12,141
Consumer | RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		5,052	4,190
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		2,232	1,033
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		60,137	42,572
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		40,452	33,151
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		14,694	7,199
Commercial | Financing Lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases		$ 4,991	$ 2,222
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

LOANS _ LEASES - Direct Financi

LOANS / LEASES - Direct Financing Leases (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One	$ 800
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	4,600
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two	800
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three	800
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four	800
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five	700
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five	700
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross investment in lease financing receivables	5,403	$ 2,401
Direct Financing Leases, Initial Direct Costs	24	21
Direct Financing Lease, Deferred Selling Profit	436	200
Direct Financing Lease, Net Investment in Lease, Total	4,991	2,222
Direct Financing Lease, Lease Receivable	4,622	1,737
Direct Financing Lease, Unguaranteed Residual Asset	$ 781	$ 664

LOANS AND LEASES - Nonaccrual L

LOANS AND LEASES - Nonaccrual Loans by Loan Class (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	$ 170	$ 77
Total nonaccrual loans and leases	861	532
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	141	69
Total nonaccrual loans and leases	494	349
Commercial | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	27	8
Total nonaccrual loans and leases	103	15
Commercial | Financing Lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	2	0
Total nonaccrual loans and leases	60	4
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	0	0
Total nonaccrual loans and leases	3	4
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	0	0
Total nonaccrual loans and leases	108	88
Consumer | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	0	0
Total nonaccrual loans and leases	87	70
Consumer | RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	0	0
Total nonaccrual loans and leases	6	2
Consumer | Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans and leases with no ACL	0	0
Total nonaccrual loans and leases	$ 0	$ 0

LOANS AND LEASES - NALs Past Du

LOANS AND LEASES - NALs Past Due (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 949	$ 819
Current		109,479	80,695
Consumer loans		139	94
Loans and leases	[1]	110,567	81,608
90 or more days past due and accruing		175	171
30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		414	319
60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		129	121
90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		406	379
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		194	153
Current		40,258	32,998
Consumer loans		0	0
Loans and leases		40,452	33,151
90 or more days past due and accruing		6	0
Commercial and industrial | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		86	38
Commercial and industrial | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		28	33
Commercial and industrial | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		80	82
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		32	12
Current		14,662	7,187
Consumer loans		0	0
Loans and leases		14,694	7,199
90 or more days past due and accruing		0	0
Commercial Real Estate | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		9	0
Commercial Real Estate | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		5	1
Commercial Real Estate | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		18	11
Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		81	118
Current		13,224	12,660
Consumer loans		0	0
Loans and leases		13,305	12,778
90 or more days past due and accruing		5	9
Automobile | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		61	84
Automobile | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		13	22
Automobile | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		7	12
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		121	111
Current		10,797	8,782
Consumer loans		1	1
Loans and leases		10,919	8,894
90 or more days past due and accruing		10	14
Home equity | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		42	35
Home equity | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		14	15
Home equity | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		65	61
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		362	346
Current		18,422	11,702
Consumer loans		138	93
Loans and leases		18,922	12,141
90 or more days past due and accruing		138	132
Residential Mortgage | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		106	114
Residential Mortgage | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		44	38
Residential Mortgage | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		212	194
RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		17	23
Current		5,035	4,167
Consumer loans		0	0
Loans and leases		5,052	4,190
90 or more days past due and accruing		2	3
RV and marine | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		12	17
RV and marine | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2	3
RV and marine | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		3	3
Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		16	16
Current		2,216	1,017
Consumer loans		0	0
Loans and leases		2,232	1,033
90 or more days past due and accruing		2	3
Other Consumer | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		11	9
Other Consumer | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		3	4
Other Consumer | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2	3
Financing Lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		126	40
Current		4,865	2,182
Consumer loans		0	0
Loans and leases		4,991	2,222
90 or more days past due and accruing		12	10
Financing Lease | 30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		87	22
Financing Lease | 60-89  Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		20	5
Financing Lease | 90 or  more days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 19	$ 13
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

LOANS AND LEASES - Vintage Cred

LOANS AND LEASES - Vintage Credit Quality (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 11,152	$ 13,211
2019	7,316	4,398
2018	4,688	2,784
2017	2,996	1,419
2016	1,401	910
Prior	1,595	985
Revolver Total at Amortized Cost Basis	11,301	9,442
Revolver Total Converted to Term Loans	3	2
Total	40,452	33,151
Interest Receivable	146	146
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	10,821	12,599
2019	6,941	4,161
2018	4,246	2,537
2017	2,626	1,192
2016	1,222	837
Prior	1,320	815
Revolver Total at Amortized Cost Basis	10,698	8,894
Revolver Total Converted to Term Loans	3	2
Total	37,877	31,037
Commercial | OLEM
Financing Receivable, Credit Quality Indicator [Line Items]
2020	148	415
2019	204	112
2018	176	65
2017	122	24
2016	33	32
Prior	81	22
Revolver Total at Amortized Cost Basis	133	124
Revolver Total Converted to Term Loans	0	0
Total	897	794
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	182	195
2019	171	125
2018	266	181
2017	244	203
2016	146	41
Prior	193	147
Revolver Total at Amortized Cost Basis	469	423
Revolver Total Converted to Term Loans	0	0
Total	1,671	1,315
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1	2
2019	0	0
2018	0	1
2017	4	0
2016	0	0
Prior	1	1
Revolver Total at Amortized Cost Basis	1	1
Revolver Total Converted to Term Loans	0	0
Total	7	5
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,898	1,863
2019	3,269	1,734
2018	3,345	1,195
2017	1,981	573
2016	1,160	593
Prior	1,409	568
Revolver Total at Amortized Cost Basis	632	673
Revolver Total Converted to Term Loans	0	0
Total	14,694	7,199
Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,561	1,742
2019	2,813	1,610
2018	2,939	1,122
2017	1,769	507
2016	929	507
Prior	1,286	539
Revolver Total at Amortized Cost Basis	613	633
Revolver Total Converted to Term Loans	0	0
Total	12,910	6,660
Commercial real estate | OLEM
Financing Receivable, Credit Quality Indicator [Line Items]
2020	57	94
2019	172	78
2018	77	63
2017	78	37
2016	82	28
Prior	46	14
Revolver Total at Amortized Cost Basis	1	4
Revolver Total Converted to Term Loans	0	0
Total	513	318
Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	280	27
2019	284	46
2018	329	10
2017	134	29
2016	149	58
Prior	77	14
Revolver Total at Amortized Cost Basis	18	36
Revolver Total Converted to Term Loans	0	0
Total	1,271	220
Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2020		0
2019		0
2018		0
2017		0
2016		0
Prior		1
Revolver Total at Amortized Cost Basis		0
Revolver Total Converted to Term Loans		0
Total		1
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Interest Receivable	143	123
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,412	4,947
2019	3,806	3,657
2018	2,630	2,143
2017	1,392	1,285
2016	740	576
Prior	325	170
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	13,305	12,778
Consumer | Automobile | 750 plus
Financing Receivable, Credit Quality Indicator [Line Items]
2020	2,250	2,670
2019	2,112	2,013
2018	1,563	1,144
2017	785	742
2016	441	317
Prior	174	81
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	7,325	6,967
Consumer | Automobile | 650-749
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,879	1,965
2019	1,442	1,343
2018	867	755
2017	458	386
2016	212	175
Prior	96	52
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	4,954	4,676
Consumer | Automobile | Less than 650
Financing Receivable, Credit Quality Indicator [Line Items]
2020	283	312
2019	252	301
2018	200	244
2017	149	157
2016	87	84
Prior	55	37
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	1,026	1,135
Consumer | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2020	713	941
2019	978	36
2018	229	35
2017	160	44
2016	122	122
Prior	805	678
Revolver Total at Amortized Cost Basis	7,447	6,565
Revolver Total Converted to Term Loans	464	472
Total	10,918	8,893
Consumer | Home equity | 750 plus
Financing Receivable, Credit Quality Indicator [Line Items]
2020	570	793
2019	812	26
2018	101	26
2017	70	32
2016	61	89
Prior	459	451
Revolver Total at Amortized Cost Basis	4,796	4,373
Revolver Total Converted to Term Loans	201	192
Total	7,070	5,982
Consumer | Home equity | 650-749
Financing Receivable, Credit Quality Indicator [Line Items]
2020	138	147
2019	156	9
2018	98	8
2017	62	11
2016	38	27
Prior	232	157
Revolver Total at Amortized Cost Basis	2,320	1,906
Revolver Total Converted to Term Loans	172	181
Total	3,216	2,446
Consumer | Home equity | Less than 650
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5	1
2019	10	1
2018	30	1
2017	28	1
2016	23	6
Prior	114	70
Revolver Total at Amortized Cost Basis	331	286
Revolver Total Converted to Term Loans	91	99
Total	632	465
Consumer | Residential mortgage | 750 plus
Financing Receivable, Credit Quality Indicator [Line Items]
2020	4,359	3,269
2019	4,253	1,370
2018	1,214	891
2017	678	1,064
2016	817	762
Prior	2,132	1,243
Revolver Total at Amortized Cost Basis	0	1
Revolver Total Converted to Term Loans	0	0
Total	13,453	8,600
Consumer | Residential mortgage | 650-749
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,443	991
2019	960	435
2018	420	307
2017	301	278
2016	270	171
Prior	975	495
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	4,369	2,677
Consumer | Residential mortgage | Less than 650
Financing Receivable, Credit Quality Indicator [Line Items]
2020	39	34
2019	56	89
2018	99	111
2017	125	108
2016	102	81
Prior	541	348
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	962	771
Consumer | RV and marine
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,339	1,488
2019	1,296	755
2018	702	811
2017	711	495
2016	440	229
Prior	564	412
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	5,052	4,190
Consumer | RV and marine | 750 plus
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,022	1,136
2019	982	525
2018	495	589
2017	518	337
2016	301	153
Prior	364	254
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	3,682	2,994
Consumer | RV and marine | 650-749
Financing Receivable, Credit Quality Indicator [Line Items]
2020	312	348
2019	303	215
2018	190	201
2017	173	136
2016	117	64
Prior	167	129
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	1,262	1,093
Consumer | RV and marine | Less than 650
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5	4
2019	11	15
2018	17	21
2017	20	22
2016	22	12
Prior	33	29
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	108	103
Consumer | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	531	107
2019	251	122
2018	292	46
2017	100	14
2016	38	6
Prior	82	18
Revolver Total at Amortized Cost Basis	894	660
Revolver Total Converted to Term Loans	44	60
Total	2,232	1,033
Consumer | Other consumer | 750 plus
Financing Receivable, Credit Quality Indicator [Line Items]
2020	486	69
2019	217	58
2018	239	26
2017	83	8
2016	32	4
Prior	73	14
Revolver Total at Amortized Cost Basis	586	340
Revolver Total Converted to Term Loans	2	2
Total	1,718	521
Consumer | Other consumer | 650-749
Financing Receivable, Credit Quality Indicator [Line Items]
2020	42	36
2019	32	56
2018	46	17
2017	14	5
2016	5	2
Prior	7	3
Revolver Total at Amortized Cost Basis	282	294
Revolver Total Converted to Term Loans	24	30
Total	452	443
Consumer | Other consumer | Less than 650
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3	2
2019	2	8
2018	7	3
2017	3	1
2016	1	0
Prior	2	1
Revolver Total at Amortized Cost Basis	26	26
Revolver Total Converted to Term Loans	18	28
Total	62	69
Consumer | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,841	4,294
2019	5,269	1,894
2018	1,733	1,309
2017	1,104	1,450
2016	1,189	1,014
Prior	3,648	2,086
Revolver Total at Amortized Cost Basis	0	1
Revolver Total Converted to Term Loans	0	0
Total	18,784	12,048
Financing Lease
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,394	1,165
2019	1,679	387
2018	942	232
2017	504	182
2016	294	143
Prior	178	113
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	4,991	2,222
Financing Lease | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1,383	1,158
2019	1,655	364
2018	915	221
2017	499	155
2016	282	137
Prior	168	101
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	4,902	2,136
Financing Lease | OLEM
Financing Receivable, Credit Quality Indicator [Line Items]
2020	8	6
2019	10	4
2018	9	4
2017	4	6
2016	4	1
Prior	1	0
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	36	21
Financing Lease | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2020	3	1
2019	14	19
2018	18	7
2017	1	21
2016	8	5
Prior	9	12
Revolver Total at Amortized Cost Basis	0	0
Revolver Total Converted to Term Loans	0	0
Total	$ 53	$ 65

LOANS AND LEASES - Credit Quali

LOANS AND LEASES - Credit Quality Indicators (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	[1]	$ 110,567	$ 81,608
Financing Lease
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		4,991	2,222
Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		13,305	12,778
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		10,919	8,894
RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		5,052	4,190
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		50,430	39,036
Consumer | Automobile
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		13,305	12,778
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		10,919	8,894
Consumer | RV and marine
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial		$ 5,052	$ 4,190
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

LOANS AND LEASES - TDRs (Detail

LOANS AND LEASES - TDRs (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract	Sep. 30, 2021USD ($)contract	Sep. 30, 2020USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	702	1,251	2,675	4,173
Post-modification outstanding recorded investment	$ 18	$ 85	$ 101	$ 295
Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1	16	3
Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	14	76	71	216
Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	4	7	13	16
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 1	$ 1	$ 60
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	16	39	53	277
Post-modification outstanding recorded investment	$ 3	$ 28	$ 38	$ 174
Commercial | Commercial and industrial | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	15	0
Commercial | Commercial and industrial | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	3	28	23	116
Commercial | Commercial and industrial | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Commercial | Commercial and industrial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 58
Commercial | Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	4	2	4	11
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 3
Commercial | Commercial Real Estate | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Commercial | Commercial Real Estate | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	3
Commercial | Commercial Real Estate | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Commercial | Commercial Real Estate | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Consumer | Automobile
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	498	726	1,914	2,582
Post-modification outstanding recorded investment	$ 4	$ 7	$ 16	$ 31
Consumer | Automobile | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Automobile | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	3	5	13	26
Consumer | Automobile | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	1	2	3	5
Consumer | Automobile | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Consumer | Residential Mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	74	242	232	448
Post-modification outstanding recorded investment	$ 9	$ 42	$ 35	$ 67
Consumer | Residential Mortgage | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Residential Mortgage | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	7	40	31	62
Consumer | Residential Mortgage | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	2	2	4	5
Consumer | Residential Mortgage | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	42	90	155	216
Post-modification outstanding recorded investment	$ 2	$ 6	$ 8	$ 13
Consumer | Home equity | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Home equity | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	1	2	3	5
Consumer | Home equity | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	1	3	5	6
Consumer | Home equity | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 1	$ 0	$ 2
Consumer | RV and marine
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	19	30	103	126
Post-modification outstanding recorded investment	$ 0	$ 1	$ 3	$ 4
Consumer | RV and marine | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	1	0
Consumer | RV and marine | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1	1	4
Consumer | RV and marine | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	1	0
Consumer | RV and marine | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Consumer | Other Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	49	122	214	513
Post-modification outstanding recorded investment	$ 0	$ 1	$ 1	$ 3
Consumer | Other Consumer | Interest rate reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	1	0	3
Consumer | Other Consumer | Amortization or maturity date change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Other Consumer | Chapter 7 bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Other Consumer | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 1	$ 0

ALLOWANCE FOR CREDIT LOSSES - A

ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total ALLL balance	$ 2,107		$ 2,107			$ 1,814
Financing Receivable, Allowance for Credit Loss, Writeoff	106	$ 141	303	$ 400
Allowance for Loan and Lease Loss, Recovery of Bad Debts	51	28	122	63
Provision for credit losses	(56)	207	42	959
Provision (reduction in allowance) for unfunded loan commitments and letters of credit	(6)	(30)	47	(14)
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		(7)	1	(10)
Acl Balance End Of Period	2,205	1,878	2,205	1,878		1,900
Allowance for credit loss, change since adoption			339
Allowance For Loans Sold Or Transferred To Loans Held For Sale			432
Financing Receivable, Allowance for Credit Loss	2,107	1,796	2,107	1,796	$ 2,218	1,814	$ 1,702	$ 783
Off-Balance Sheet, Credit Loss, Liability	98	82	98	82	104	52	119	104
TCF Financial Corporation
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	234		234
Provision (reduction in allowance) for unfunded loan commitments and letters of credit	60		60
Financing Receivable, Allowance for Credit Loss	294		294
ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total ALLL balance								391
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff	32	40	90	128
Allowance for Loan and Lease Loss, Recovery of Bad Debts	24	16	64	43
Provision for credit losses	(34)	24	(52)	176
Provision (reduction in allowance) for unfunded loan commitments and letters of credit	(8)	(3)	2	(7)
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		0	0	0
Acl Balance End Of Period	578	568	578	568
Allowance For Loans Sold Or Transferred To Loans Held For Sale			58
Financing Receivable, Allowance for Credit Loss	558	533	558	533	600	578	533	231
Off-Balance Sheet, Credit Loss, Liability	20	35	20	35	28	18	38	2
Consumer | ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total ALLL balance								211
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff	74	101	213	272
Allowance for Loan and Lease Loss, Recovery of Bad Debts	27	12	58	20
Provision for credit losses	(22)	183	94	783
Provision (reduction in allowance) for unfunded loan commitments and letters of credit	2	(27)	45	(7)
Additions to Unfunded Loan Commitments and Letters of Credit Allowance		(7)	(1)	(10)
Acl Balance End Of Period	1,627	1,310	1,627	1,310
Allowance For Loans Sold Or Transferred To Loans Held For Sale			374
Financing Receivable, Allowance for Credit Loss	1,549	1,263	1,549	1,263	1,618	1,236	1,169	552
Off-Balance Sheet, Credit Loss, Liability	$ 78	$ 47	$ 78	$ 47	$ 76	34	$ 81	102
Commercial | ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Total ALLL balance								$ 180
Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
AULC Balance						2
Cumulative Effect, Period of Adoption, Adjustment | Consumer | ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
AULC Balance						40
Cumulative Effect, Period of Adoption, Adjustment | Commercial | ASU 2016-13
Financing Receivable, Allowance for Credit Loss [Roll Forward]
AULC Balance						$ (38)

ALLOWANCE FOR CREDIT LOSSES - N

ALLOWANCE FOR CREDIT LOSSES - Narritive (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Credit Loss [Abstract]
Acl Balance End Of Period	$ 2,205	$ 1,900	$ 1,878
Allowance for credit loss, change since adoption	$ 339

MORTGAGE LOAN SALES AND SERVI_3

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Narrative (Details) - Residential Mortgage - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]
Servicing income	$ 22	$ 16	$ 57	$ 47
Unpaid principal balance of third party serviced loans	$ 30,600		$ 30,600		$ 23,500

MORTGAGE LOAN SALES AND SERVI_4

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Residential Mortgage Portfolio (Details) - Residential Mortgage - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Servicing Asset at Amortized Cost [Line Items]
Loans sold with servicing retained	$ 2,298	$ 2,391	$ 7,302	$ 6,106
Pretax gains resulting from above loan sales	$ 80	$ 98	$ 274	$ 196

MORTGAGE LOAN SALES AND SERVI_5

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Residential Mortgage Portfolio, MSRs Fair Value Method (Details) - Residential Mortgage - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning of period	$ 327	$ 172	$ 210	$ 7
Servicing Asset at Fair Value, Additions	31	30	103	70
Time decay	(4)	(2)	(11)	(6)
Servicing Asset At Fair Value Payoffs	(17)	(13)	(50)	(29)
Changes in valuation inputs or assumptions (less than)	1	4	27	(56)
Fair value, end of period:	338	191	338	191
Servicing Asset at Fair Value, Other Changes that Affect Balance	$ 0	$ 0	$ 59	0
Revision of Prior Period, Adjustment
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning of period				$ 205
Fair value, end of period:
Fair value method
Servicing Asset at Fair Value, Amount [Roll Forward]
Weighted-average life (years)	7 years	6 years 4 months 24 days	7 years	6 years 4 months 24 days

MORTGAGE LOAN SALES AND SERVI_6

MORTGAGE LOAN SALES AND SERVICING RIGHTS - Residential Mortgage Portfolio, MSRs Fair Value Method Key Assumptions (Details) - Fair value method - Residential Mortgage - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]
Constant prepayment rate (annualized), actual	12.21%	17.36%
Constant prepayment rate (annualized), 10% adverse change	$ (16)	$ (12)
Constant prepayment rate (annualized), 20% adverse change	$ (30)	$ (23)
Spread over forward interest rate swap rates, actual	5.45%	5.19%
Spread over forward interest rate swap rates, 10% adverse change	$ (7)	$ (4)
Spread over forward interest rate swap rates, 20% adverse change	$ (14)	$ (8)

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill by business segment
Balance, December 31, 2020	$ 1,990
Goodwill, Acquired During Period	3,326
Balance, September 30, 2021	5,316
Treasury / Other
Goodwill by business segment
Balance, December 31, 2020	0
Goodwill, Acquired During Period	0
Balance, September 30, 2021	0
Consumer & Business Banking | Operating Segments
Goodwill by business segment
Balance, December 31, 2020	1,393
Goodwill, Acquired During Period	2,006
Balance, September 30, 2021	3,399
Commercial Banking | Operating Segments
Goodwill by business segment
Balance, December 31, 2020	427
Goodwill, Acquired During Period	1,260
Balance, September 30, 2021	1,687
CREVF | Operating Segments
Goodwill by business segment
Balance, December 31, 2020	0
Goodwill, Acquired During Period	0
Balance, September 30, 2021	0
RBPCG | Operating Segments
Goodwill by business segment
Balance, December 31, 2020	170
Goodwill, Acquired During Period	60
Balance, September 30, 2021	$ 230

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 255	$ 191
Finite-Lived Intangible Assets, Gross	497	411
Finite-Lived Intangible Assets, Accumulated Amortization	(242)	(220)
Core deposit intangible
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	224	160
Finite-Lived Intangible Assets, Gross	389	310
Finite-Lived Intangible Assets, Accumulated Amortization	(165)	(150)
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	31	31
Finite-Lived Intangible Assets, Gross	108	101
Finite-Lived Intangible Assets, Accumulated Amortization	$ (77)	$ (70)

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS - Future Amortization (Details) $ in Millions	Sep. 30, 2021USD ($)
Estimated amortization expense of other intangible assets
Finite-Lived Intangible Asset, Expected Amortization, Year One	$ 53
Finite-Lived Intangible Asset, Expected Amortization, Year Two	49
Finite-Lived Intangible Asset, Expected Amortization, Year Three	45
Finite-Lived Intangible Asset, Expected Amortization, Year Four	42
Finite-Lived Intangible Asset, Expected Amortization, Year Five	29
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 14

GOODWILL AND OTHER INTANGIBLE_6

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - 9 months ended Sep. 30, 2021	Reportable_segment	numberOfSegments
Business Combinations [Abstract]
Number of Reportable Segments	4	4

BORROWINGS - SCHEDULE OF SHORT-

BORROWINGS - SCHEDULE OF SHORT-TERM DEBT (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term Debt	$ 435	$ 183
Federal Funds Purchased and Securities Sold under Agreements to Repurchase
Short-term Debt [Line Items]
Short-term Debt	401	71
Notes Payable, Other Payables
Short-term Debt [Line Items]
Short-term Debt	$ 34	$ 112

BORROWINGS - Schedule of Long-T

BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 7,779	$ 8,352
Subordinated Notes | 4.600% Huntington National Bank subordinated notes due 2025
Debt Instrument [Line Items]
Debt stated interest rate	4.60%
Federal Home Loan Bank advances
Debt Instrument [Line Items]
Long-term debt	$ 216	3
Notes Payable, Other Payables
Debt Instrument [Line Items]
Long-term debt	460	441
Parent
Debt Instrument [Line Items]
Long-term debt	3,839	4,142
Parent | Senior Notes
Debt Instrument [Line Items]
Long-term debt	2,802	3,635
Parent | Subordinated Notes
Debt Instrument [Line Items]
Long-term debt	$ 1,037	507
Parent | Subordinated Notes | 3.55% Huntington Bancshares Incorporated subordinated notes due 2023
Debt Instrument [Line Items]
Debt stated interest rate	4.35%
Bank
Debt Instrument [Line Items]
Long-term debt	$ 3,264	3,766
Bank | Senior Notes
Debt Instrument [Line Items]
Long-term debt	2,451	3,533
Bank | Subordinated Notes
Debt Instrument [Line Items]
Long-term debt	$ 813	$ 233

BORROWINGS - Narrative (Details

BORROWINGS - Narrative (Details) - USD ($) $ in Millions	Aug. 15, 2031	Sep. 30, 2021	Aug. 16, 2021	Jun. 09, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt		$ 7,779			$ 8,352
Parent
Debt Instrument [Line Items]
Long-term debt		3,839			4,142
Bank
Debt Instrument [Line Items]
Long-term debt		3,264			3,766
Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Long-term debt		216			3
Subordinated Notes | Parent
Debt Instrument [Line Items]
Long-term debt		1,037			507
Subordinated Notes | Bank
Debt Instrument [Line Items]
Long-term debt		813			233
Senior Notes | Parent
Debt Instrument [Line Items]
Long-term debt		2,802			3,635
Senior Notes | Bank
Debt Instrument [Line Items]
Long-term debt		$ 2,451			$ 3,533
TCF Financial Corporation
Debt Instrument [Line Items]
Long-term debt				$ 1,516
TCF Financial Corporation | Parent | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		2.85%
TCF Financial Corporation | Bank | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		0.64%
TCF Financial Corporation | Bank | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%
TCF Financial Corporation | Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Long-term debt		$ 213
Debt stated interest rate		1.03%
TCF Financial Corporation | Subordinated Notes
Debt Instrument [Line Items]
Long-term debt		$ 598
TCF Financial Corporation | Subordinated Notes | Parent
Debt Instrument [Line Items]
Long-term debt		8
TCF Financial Corporation | Subordinated Notes | Bank
Debt Instrument [Line Items]
Long-term debt		$ 590
Huntington Bancshares Incorporated Senior Notes Due 2036 2.487 percent | Subordinated Notes | Parent
Debt Instrument [Line Items]
Debt stated interest rate			2.487%
Debt face amount			$ 558
Huntington Bancshares Incorporated Senior Notes Due 2036 2.487 percent | Subordinated Notes | Parent | Forecast
Debt Instrument [Line Items]
Basis spread on variable rate	1.17%
3.55% Huntington Bancshares Incorporated subordinated notes due 2023 | Subordinated Notes | Parent
Debt Instrument [Line Items]
Debt stated interest rate		4.35%
6.250% Huntington National Bank subordinated notes due 2022 | Subordinated Notes
Debt Instrument [Line Items]
Debt stated interest rate		6.25%
4.600% Huntington National Bank subordinated notes due 2025 | Subordinated Notes
Debt Instrument [Line Items]
Debt stated interest rate		4.60%
3.86% Huntington National Bank subordinated notes due 2026 | Subordinated Notes
Debt Instrument [Line Items]
Debt stated interest rate		4.27%

OTHER COMPREHENSIVE INCOME - Ac

OTHER COMPREHENSIVE INCOME - Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Pretax
Other comprehensive income (loss), pretax	$ (145)	$ (43)	$ (411)	$ 659
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	39	10	94	(146)
After-tax
Other comprehensive income (loss), net of tax	(106)	(33)	(317)	513
Other comprehensive income before reclassifications	(113)	(40)	(347)	492
Amounts reclassified from accumulated OCI to earnings	7	7	30	21
Period change	(106)	(33)	(317)	513
Change in fair value related to cash flow hedges
Pretax
Other comprehensive income (loss), pretax	(43)	(52)
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	14	12
After-tax
Other comprehensive income (loss), net of tax	(29)	(40)
Unrealized gains (losses) for pension and other post-retirement obligations
Pretax
Other comprehensive income (loss), pretax	3	3	12	(8)
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit	0	(1)	(3)	2
After-tax
Other comprehensive income (loss), net of tax	3	2	9	(6)
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated OCI to earnings	3	2	9	(6)
Period change	3	2	9	(6)
Accumulated Foreign Currency Adjustment Attributable to Parent
Pretax
OCI, before Reclassifications, before Tax, Attributable to Parent	(7)		(13)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	9		9
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	2		(4)
Tax (Expense) Benefit
Reclassification adjustment, tax	0		0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	0		0
After-tax
Other comprehensive income before reclassifications	(7)		(13)
Amounts reclassified from accumulated OCI to earnings	9		9
Period change	2		(4)
Net unrealized gains (losses) on net investment hedges
Pretax
Other comprehensive income (loss), pretax			(135)	358
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit			(33)	(79)
After-tax
Other comprehensive income (loss), net of tax			(102)	279
Other comprehensive income before reclassifications	(29)	(40)	(102)	279
Amounts reclassified from accumulated OCI to earnings	0	0	0	0
Period change	(29)	(40)	(102)	279
Debt Securities | Unrealized gains and (losses) on debt securities
Pretax
Other comprehensive income (loss), before reclassifications, before tax	(112)	0	(311)	274
Reclassification adjustment, before tax	5	6	27	35
Other comprehensive income (loss), pretax	(107)	6
Tax (Expense) Benefit
Other comprehensive income (loss) before reclassifications, tax	26	0	70	(61)
Reclassification adjustment, tax	(1)	(1)	(6)	(8)
Total other comprehensive income (loss), tax (expense) benefit	25	(1)
After-tax
Other comprehensive income (loss), before reclassifications, net of tax	(86)	0	(241)	213
Reclassification adjustment, net of tax	4	5	21	27
Other comprehensive income (loss), net of tax	(82)	5	(220)	240
Other comprehensive income before reclassifications	(86)	0	(241)	213
Amounts reclassified from accumulated OCI to earnings	4	5	21	27
Period change	$ (82)	$ 5	(220)	240
Debt Securities | Unrealized gains and (losses) on debt securities and Accumulated OTTI
Pretax
Other comprehensive income (loss), pretax			(284)	309
Tax (Expense) Benefit
Total other comprehensive income (loss), tax (expense) benefit			$ 64	$ (69)

OTHER COMPREHENSIVE INCOME OTHE

OTHER COMPREHENSIVE INCOME OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period					$ 12,993
Other comprehensive income before reclassifications			$ (113)	$ (40)	(347)	$ 492
Amounts reclassified from accumulated OCI to earnings			7	7	30	21
Period change			(106)	(33)	(317)	513
Balance, end of period	$ 19,479		19,479		19,479
Accumulated Other Comprehensive Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(19)	290	192	(256)
Balance, end of period	(125)	$ 257	(125)	257	(125)	257
Unrealized gains and (losses) on debt securities | Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			50	207	188	(28)
Other comprehensive income before reclassifications			(86)	0	(241)	213
Amounts reclassified from accumulated OCI to earnings			4	5	21	27
Period change			(82)	5	(220)	240
Balance, end of period	(32)	212	(32)	212	(32)	212
Net unrealized gains (losses) on net investment hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			184	342	257	23
Other comprehensive income before reclassifications			(29)	(40)	(102)	279
Amounts reclassified from accumulated OCI to earnings			0	0	0	0
Period change			(29)	(40)	(102)	279
Balance, end of period	155	302	155	302	155	302
Translation adjustments, net of hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(6)	0	0	0
Other comprehensive income before reclassifications			2	0	(4)	0
Amounts reclassified from accumulated OCI to earnings			0	0	0	0
Period change			2	0	(4)	0
Balance, end of period	(4)	0	(4)	0	(4)	0
Unrealized gains (losses) for pension and other post-retirement obligations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(247)	(259)	(253)	(251)
Other comprehensive income before reclassifications			0	0	0	0
Amounts reclassified from accumulated OCI to earnings			3	2	9	(6)
Period change			3	2	9	(6)
Balance, end of period	(244)	(257)	$ (244)	$ (257)	$ (244)	$ (257)
Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net unrealized loss on securities transfer	$ (41)	$ (74)

SHAREHOLDERS' EQUITY (Details)

SHAREHOLDERS' EQUITY (Details) $ / shares in Units, $ in Thousands	Oct. 15, 2021$ / sharesRateshares	Jul. 15, 2021$ / sharesRateshares	Jun. 09, 2021$ / shares	Jun. 09, 2021$ / sharesRate	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2020USD ($)$ / shares	Sep. 30, 2021USD ($)$ / sharesRateshares	Sep. 30, 2020USD ($)$ / shares	Jun. 30, 2021shares	Mar. 31, 2021shares	Dec. 31, 2020USD ($)shares
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference Per Share | $ / shares					$ 1,000		$ 1,000
Preferred Stock, Shares Outstanding | shares					657,500		657,500				750,500
Preferred Stock, Value, Outstanding					$ 2,267,000		$ 2,267,000
Dividends, Preferred Stock, Cash					$ (29,000)	$ (28,000)	$ (103,000)	$ (65,000)
Depositary Shares, Redeemed | shares		24,000,000
Depositary Share, Redemption Price | $ / shares		$ 25
Depositary Share, Redemption, Declared And Unpaid Dividends | $ / shares		$ 0.390625
Common Stock, Shares Authorized | shares					2,250,000,000		2,250,000,000		2,250,000,000	1,500,000,000	1,500,000,000
Treasury Stock, Value					$ (79,000)		$ (79,000)				$ (59,000)
Treasury Stock Acquired, Average Cost Per Share | $ / shares					$ 14.96
Stock Repurchase Program, Authorized Amount					$ 800,000		800,000
Stock Repurchased and Retired During Period, Shares | shares					33,400,000
Stock Repurchased and Retired During Period, Value					$ 500,000		$ 500,000	88,000
Red Iron
Class of Stock [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent					55.00%		55.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					45.00%		45.00%
Subsequent Event
Class of Stock [Line Items]
Depositary Shares, Redeemed | shares	4,000,000
Depositary Share, Redemption Price | $ / shares	$ 25
Depositary Share, Redemption, Declared And Unpaid Dividends | $ / shares	$ 0.36725
Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (29,000)	$ (28,000)	$ (103,000)	$ (65,000)
Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					35,500		35,500
Preferred Stock, Value, Outstanding					$ 23,000		$ 23,000
Preferred Stock, Redemption Date							Jan. 15, 2017
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 7.07	$ 7.44	$ 21.63	$ 28.56
Series B Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ 0	$ 0	$ 0	$ (1,000)
Series C Preferred Stock
Class of Stock [Line Items]
Depository Share, Percent Interest in Preferred Stock							0.025
Preferred Stock, Shares Outstanding | shares					100,000		100,000
Preferred Stock, Value, Outstanding					$ 100,000		$ 100,000
Preferred Stock, Redemption Date							Oct. 15, 2021
Preferred Stock, Dividend Rate, Percentage | Rate							5.875%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 14.69	$ 14.69	$ 44.07	$ 44.07
Series C Preferred Stock | TCF Financial Corporation
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.70%	5.70%
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.01	$ 0.01
Series C Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage | Rate	5.875%
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.01
Depositary Share, Redemption, Declared And Unpaid Dividends | $ / shares	$ 14.69
Series C Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (1,000)	$ (1,000)	$ (4,000)	$ (4,000)
Series E Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					5,000		5,000
Preferred Stock, Value, Outstanding					$ 495,000		$ 495,000
Preferred Stock, Redemption Date							Apr. 15, 2023
Preferred Stock, Dividend Rate, Percentage | Rate							5.70%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 1,425	$ 1,425	$ 4,275	$ 4,275
Series E Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (7,000)	$ (7,000)	$ (21,000)	$ (21,000)
Series D Preferred Stock
Class of Stock [Line Items]
Depository Share, Percent Interest in Preferred Stock							0.025
Preferred Stock, Dividend Rate, Percentage | Rate		6.25%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 0	$ 15.63	$ 31.25	$ 46.88
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.01
Depositary Share, Redemption, Declared And Unpaid Dividends | $ / shares		$ 15.625
Stock Repurchased and Retired During Period, Value					$ 600,000		$ 600,000
Series D Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					0	$ (10,000)	(18,000)	$ (29,000)
Stock Repurchased and Retired During Period, Value					$ 15,000		$ 15,000
Series F Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					5,000		5,000
Preferred Stock, Value, Outstanding					$ 494,000		$ 494,000
Preferred Stock, Redemption Date							Jul. 15, 2030
Preferred Stock, Dividend Rate, Percentage | Rate							5.625%
Preferred Stock, Liquidation Preference, Value					$ 100		$ 100
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 1,406.25	$ 2,062.5	$ 4,218.75	$ 2,062.5
Series F Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (7,000)	$ (10,000)	$ (21,000)	$ (10,000)
Series G Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					5,000		5,000
Preferred Stock, Value, Outstanding					$ 494,000		$ 494,000
Preferred Stock, Redemption Date							Oct. 15, 2027
Preferred Stock, Dividend Rate, Percentage | Rate							4.45%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 1,112.5	$ 0	$ 3,337.5	$ 0
Series G Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (6,000)	$ 0	$ (18,000)	$ 0
Series H Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					500,000		500,000
Preferred Stock, Value, Outstanding					$ 486,000		$ 486,000
Preferred Stock, Redemption Date							Apr. 15, 2026
Preferred Stock, Dividend Rate, Percentage | Rate							4.50%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 11.25	$ 0	$ 30.75	$ 0
Series H Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (6,000)	$ 0	$ (16,000)	$ 0
Series I Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding | shares					7,000		7,000
Preferred Stock, Value, Outstanding					$ 175,000		$ 175,000
Preferred Stock, Redemption Date							Dec. 1, 2022
Preferred Stock, Dividend Rate, Percentage | Rate				5.70%			5.70%
Preferred Stock, Dividends Per Share, Declared | $ / shares					$ 356.25	$ 0	$ 712.50	$ 0
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 0.01	$ 0.01
Series I Preferred Stock | Retained Earnings [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash					$ (2,000)	$ 0	$ (5,000)	$ 0
London Interbank Offered Rate (LIBOR) | Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Basis Spread On Variable Rate					2.70%		2.70%

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic earnings per common share:
Net income attributable to Huntington Bancshares Inc	$ 377,000	$ 303,000	$ 894,000	$ 501,000
Dividends on preferred shares	29,000	28,000	103,000	65,000
Net income available to common shareholders	$ 333,000	$ 275,000	$ 776,000	$ 436,000
Average common shares issued and outstanding (in shares)	1,462,736	1,017,253	1,201,763	1,017,052
Basic earnings per common share (in usd per share)	$ 0.23	$ 0.27	$ 0.65	$ 0.43
Dilutive potential common shares:
Stock options and restricted stock units and awards	17,536	9,005	17,623	9,628
Shares held in deferred compensation plans	7,063	5,202	6,042	4,893
Dilutive potential common shares	24,599	14,207	23,665	14,521
Total diluted average common shares issued and outstanding (in shares)	1,487,335	1,031,460	1,225,428	1,031,573
Diluted earnings per common share (in usd per share)	$ 0.22	$ 0.27	$ 0.63	$ 0.42
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Other Preferred Stock Dividends and Adjustments	$ 15,000	$ 0	$ 15,000	$ 0
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options outstanding to purchase common stock shares having antidilutive effect	4,609	13,954	4,410	12,420

NONINTEREST INCOME - Summary of

NONINTEREST INCOME - Summary of Noninterest Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Noninterest income from contracts with customers	$ 315	$ 224	$ 794	$ 652
Noninterest income within the scope of other GAAP topics	220	206	580	530
Total noninterest income	$ 535	$ 430	$ 1,374	$ 1,182

NONINTEREST INCOME - Disaggrega

NONINTEREST INCOME - Disaggregation by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	$ 315	$ 224	$ 794	$ 652
Noninterest income within the scope of other GAAP topics	220	206	580	530
Noninterest income	535	430	1,374	1,182
Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	114	76	271	222
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	91	63	225	174
Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	61	48	168	140
Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	25	24	77	72
Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	24	13	53	44
Operating Segments | Consumer & Business Banking
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	211	144	514	407
Noninterest income within the scope of other GAAP topics	91	130	266	297
Noninterest income	302	274	780	704
Operating Segments | Consumer & Business Banking | Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	89	54	201	161
Operating Segments | Consumer & Business Banking | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	85	59	211	163
Operating Segments | Consumer & Business Banking | Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	17	13	45	33
Operating Segments | Consumer & Business Banking | Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	12	12	38	32
Operating Segments | Consumer & Business Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	8	6	19	18
Operating Segments | Commercial Banking
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	36	32	98	87
Noninterest income within the scope of other GAAP topics	114	58	255	174
Noninterest income	150	90	353	261
Operating Segments | Commercial Banking | Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	23	19	64	54
Operating Segments | Commercial Banking | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	6	4	14	11
Operating Segments | Commercial Banking | Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	1	1	3
Operating Segments | Commercial Banking | Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	2	2	5	5
Operating Segments | Commercial Banking | Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	5	6	14	14
Operating Segments | Vehicle Finance
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	2	3	6	6
Noninterest income within the scope of other GAAP topics	2	(1)	3	1
Noninterest income	4	2	9	7
Operating Segments | Vehicle Finance | Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	1	2	4	4
Operating Segments | Vehicle Finance | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Operating Segments | Vehicle Finance | Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Operating Segments | Vehicle Finance | Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Operating Segments | Vehicle Finance | Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	1	1	2	2
Operating Segments | RBPCG
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	58	49	164	152
Noninterest income within the scope of other GAAP topics	0	(2)	1	(1)
Noninterest income	58	47	165	151
Operating Segments | RBPCG | Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	1	1	2	3
Operating Segments | RBPCG | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Operating Segments | RBPCG | Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	44	34	122	104
Operating Segments | RBPCG | Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	11	11	33	34
Operating Segments | RBPCG | Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	2	3	7	11
Treasury / Other
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	8	(4)	12	0
Noninterest income within the scope of other GAAP topics	13	21	55	59
Noninterest income	21	17	67	59
Treasury / Other | Mortgage banking income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Treasury / Other | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Treasury / Other | Card and payment processing income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	0	0	0
Treasury / Other | Insurance income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	0	(1)	1	1
Treasury / Other | Other noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income from contracts with customers	$ 8	$ (3)	$ 11	$ (1)

FAIR VALUES OF ASSETS AND LIA_3

FAIR VALUES OF ASSETS AND LIABILITIES - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 1,297	$ 1,198
Loans and leases, fair value	$ 139	$ 94

FAIR VALUES OF ASSETS AND LIA_4

FAIR VALUES OF ASSETS AND LIABILITIES - Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets measured at fair value on a recurring basis
Fair Value	$ 25,654	$ 16,485
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
Consumer loans	139	94
Gross amounts of recognized assets	1,586	1,946
Derivative assets netting	(686)	(889)
Net amounts of assets presented in the condensed consolidated balance sheets	900	1,057
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	1,063	1,033
Gross amounts offset in the condensed consolidated balance sheets	(813)	(917)
Derivatives	250	116
Short-term Debt	435	183
Municipal securities
Assets measured at fair value on a recurring basis
Fair Value	3,634	3,004
Private-label CMO
Assets measured at fair value on a recurring basis
Fair Value	120	9
U.S. Treasury
Assets measured at fair value on a recurring basis
Fair Value	5	5
Residential MBS
Assets measured at fair value on a recurring basis
Fair Value	14,337	7,935
Commercial MBS
Assets measured at fair value on a recurring basis
Fair Value	1,498	1,163
Other agencies
Assets measured at fair value on a recurring basis
Fair Value	264	62
Asset-backed securities
Assets measured at fair value on a recurring basis
Fair Value	285	192
Corporate debt
Assets measured at fair value on a recurring basis
Fair Value	1,773	445
Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Trading account securities	77
Fair Value	25,654	16,485
Other securities	86	59
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
MSRs	338	210
Derivative assets netting	(686)	(889)
Net amounts of assets presented in the condensed consolidated balance sheets	900	1,057
Restricted Assets, Fair Value Disclosure	151	73
Liabilities measured at fair value on a recurring basis
Gross amounts offset in the condensed consolidated balance sheets	(813)	(917)
Derivatives	250	116
Fair Value, Measurements, Recurring | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	77	62
Fair Value	3,634	3,004
Fair Value, Measurements, Recurring | Private-label CMO
Assets measured at fair value on a recurring basis
Fair Value	120	9
Fair Value, Measurements, Recurring | Other securities
Assets measured at fair value on a recurring basis
Fair Value	4	4
Fair Value, Measurements, Recurring | U.S. Treasury
Assets measured at fair value on a recurring basis
Fair Value	5	5
Fair Value, Measurements, Recurring | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Fair Value	3,734	3,666
Fair Value, Measurements, Recurring | Residential MBS
Assets measured at fair value on a recurring basis
Fair Value	14,337	7,935
Fair Value, Measurements, Recurring | Commercial MBS
Assets measured at fair value on a recurring basis
Fair Value	1,498	1,163
Fair Value, Measurements, Recurring | Other agencies
Assets measured at fair value on a recurring basis
Fair Value	264	62
Fair Value, Measurements, Recurring | Asset-backed securities
Assets measured at fair value on a recurring basis
Fair Value	285	192
Fair Value, Measurements, Recurring | Corporate debt
Assets measured at fair value on a recurring basis
Fair Value	1,773	445
Fair Value, Measurements, Recurring | Level 1
Assets measured at fair value on a recurring basis
Trading account securities	0
Fair Value	5	5
Other securities	62	59
Loans Held-for-sale, Fair Value Disclosure	0	0
Consumer loans	0	0
MSRs	0	0
Gross amounts of recognized assets	0	0
Restricted Assets, Fair Value Disclosure	151	73
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Private-label CMO
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Other securities
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury
Assets measured at fair value on a recurring basis
Fair Value	5	5
Fair Value, Measurements, Recurring | Level 1 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Residential MBS
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Commercial MBS
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Other agencies
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2
Assets measured at fair value on a recurring basis
Trading account securities	77
Fair Value	22,014	13,510
Other securities	24	0
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
Consumer loans	119	71
MSRs	0	0
Gross amounts of recognized assets	1,567	1,903
Restricted Assets, Fair Value Disclosure	0	0
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	1,056	1,031
Fair Value, Measurements, Recurring | Level 2 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	77	62
Fair Value	52	53
Fair Value, Measurements, Recurring | Level 2 | Private-label CMO
Assets measured at fair value on a recurring basis
Fair Value	102	0
Fair Value, Measurements, Recurring | Level 2 | Other securities
Assets measured at fair value on a recurring basis
Fair Value	4	4
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 2 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Fair Value	3,734	3,666
Fair Value, Measurements, Recurring | Level 2 | Residential MBS
Assets measured at fair value on a recurring basis
Fair Value	14,337	7,935
Fair Value, Measurements, Recurring | Level 2 | Commercial MBS
Assets measured at fair value on a recurring basis
Fair Value	1,498	1,163
Fair Value, Measurements, Recurring | Level 2 | Other agencies
Assets measured at fair value on a recurring basis
Fair Value	264	62
Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities
Assets measured at fair value on a recurring basis
Fair Value	250	182
Fair Value, Measurements, Recurring | Level 2 | Corporate debt
Assets measured at fair value on a recurring basis
Fair Value	1,773	445
Fair Value, Measurements, Recurring | Level 3
Assets measured at fair value on a recurring basis
Trading account securities	0
Fair Value	3,635	2,970
Other securities	0
Loans Held-for-sale, Fair Value Disclosure	0	0
Consumer loans	20	23
MSRs	338	210
Gross amounts of recognized assets	19	43
Restricted Assets, Fair Value Disclosure	0	0
Liabilities measured at fair value on a recurring basis
Gross amounts of recognized liabilities	7	2
Fair Value, Measurements, Recurring | Level 3 | Municipal securities
Assets measured at fair value on a recurring basis
Trading account securities	0	0
Fair Value	3,582	2,951
Fair Value, Measurements, Recurring | Level 3 | Private-label CMO
Assets measured at fair value on a recurring basis
Fair Value	18	9
Fair Value, Measurements, Recurring | Level 3 | Other securities
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Federal agencies: Mortgage-backed securities
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Residential MBS
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Commercial MBS
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Other agencies
Assets measured at fair value on a recurring basis
Fair Value	0	0
Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities
Assets measured at fair value on a recurring basis
Fair Value	35	10
Fair Value, Measurements, Recurring | Level 3 | Corporate debt
Assets measured at fair value on a recurring basis
Fair Value	$ 0	$ 0

FAIR VALUES OF ASSETS AND LIA_5

FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	$ 25,654		$ 25,654		$ 16,485
Assets Level 3 Roll Forward:
Transfers out of Level 3 (1)			(109)	$ (139)
Total gains/losses for the period:
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)			0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases			7	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements			0	0
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)			33	42
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	12	$ 48	12	48	41		$ (6)
MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Assets Level 3 Roll Forward:
Opening balance	327	172	210	7
Transfers out of Level 3 (1)	0
Total gains/losses for the period:
Included in earnings	1	19	27	(21)
Included in OCI	0	0	0	0
Purchases/originations	31	0	162	0
Repayments	0	0	0	0
Settlements	(21)	0	(61)	0
Closing balance	338	191	338	191	210	$ (205)	7
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	1	18	27	(22)
Derivative instruments
Assets Level 3 Roll Forward:
Opening balance	23	40
Transfers out of Level 3 (1)	(39)	(64)
Total gains/losses for the period:
Included in earnings	(28)	(72)
Included in OCI	0	0
Purchases/originations	0	0
Repayments	0	0	0	0
Settlements	0	0
Closing balance	12	48	12	48
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date	(12)	8
Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Assets Level 3 Roll Forward:
Opening balance	3,609	3,102	2,951	2,999
Transfers out of Level 3 (1)	0
Total gains/losses for the period:
Included in earnings	(1)	(1)	(1)	(2)
Included in OCI	(8)	60	(13)	61
Purchases/originations	260	154	1,613	491
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(17)		(369)
Repayments	0	0	0	0
Settlements	(261)	(226)	(599)	(460)
Closing balance	3,582	3,089	3,582	3,089	2,951		2,999
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	(10)	62	(14)	64
Private-label CMO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Assets Level 3 Roll Forward:
Opening balance	18	5	9	2
Transfers out of Level 3 (1)	0
Total gains/losses for the period:
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases/originations	0	0	8	3
Repayments	0	0	0	0
Settlements	0	0	1	0
Closing balance	18	5	18	5	9		2
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0		0	0
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, Transfers out of Level 3		0	0
Assets Level 3 Roll Forward:
Opening balance	46	56	10	48
Transfers out of Level 3 (1)	0
Total gains/losses for the period:
Included in earnings	0	0	0	0
Included in OCI	0	0	0	28
Purchases/originations	0	0	75	0
Repayments	0	0	0	(27)
Settlements	(11)	(7)	(50)
Closing balance	35	49	35	49	10		48
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0
Real Estate Loan [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Assets Level 3 Roll Forward:
Opening balance	21	25	23	26
Transfers out of Level 3 (1)	0
Total gains/losses for the period:
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases/originations	0	0	0	0
Repayments	(1)	(1)	(3)	(2)
Settlements	0	0	0	0
Closing balance	20	24	20	24	23		$ 26
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
Commercial MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	1,498		1,498		1,163
Residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	14,337		14,337		7,935
Fair Value, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	25,654		25,654		16,485
Total gains/losses for the period:
MSRs	338		338		210
Fair Value, Recurring [Member] | Commercial MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	1,498		1,498		1,163
Fair Value, Recurring [Member] | Residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	14,337		14,337		7,935
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	22,014		22,014		13,510
Total gains/losses for the period:
MSRs	0		0		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	1,498		1,498		1,163
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	$ 14,337		$ 14,337		$ 7,935

FAIR VALUES OF ASSETS AND LIA_6

FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Classification of Gains/Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings			$ 73	$ 181
Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings			73	181
Interest and Fee Income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, 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	$ 1	$ 19	27	(21)
Mortgage banking income	(1)	(19)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	1	19
Fair Value Assets Measured On Recurring Basis Gain Loss Included In Interest and fee 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			27	(21)
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
Derivative Financial Instruments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage banking income	(28)	(72)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(28)	(72)
Fair Value Assets Measured On Recurring Basis Gain Loss Included In Interest and fee 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	(1)	(1)	(1)	(2)
Mortgage banking income	0	0
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(1)	(1)
Fair Value Assets Measured On Recurring Basis Gain Loss Included In Interest and fee income	(1)	(1)
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 | 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			(1)	(2)
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	$ 0	$ 0	$ 0	$ 0

FAIR VALUES OF ASSETS AND LIA_7

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 1,297	$ 1,198
Loans and leases, fair value	139	94
Fair Value, Measurements, Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
Fair Value, Measurements, Recurring | Mortgages Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans Held For Sale Unpaid Principal	1,260	1,134
Difference	(37)	(64)
Fair Value, Measurements, Recurring | Mortgages Held To Maturity
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans and leases, fair value	139	94
Loans Held To Maturity Unpaid Principal	143	99
Difference	(4)	(5)
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	0	2
Loans Held For Sale Unpaid Principal	0	2
Difference	0	0
Fair Value, Measurements, Recurring | 90 or  more days | Mortgages Held To Maturity
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans and leases, fair value	3	7
Loans Held To Maturity Unpaid Principal	4	8
Difference	$ (1)	$ (1)

FAIR VALUES OF ASSETS AND LIA_8

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option-Changes in Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Measurements, Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale (1)	$ (4)	$ 13	$ (30)	$ 35

FAIR VALUES OF ASSETS AND LIA_9

FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	[1]	$ 1,335	$ 1,275
Available-for-sale securities		25,654	16,485
Long-term debt		7,779	8,352
Amortized Cost (1)		12,455	8,861
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases		108,460	79,794
Loans Held-for-sale, Fair Value Disclosure		(1,297)	(1,198)
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		77	62
Loans held for sale		1,335	1,275
Available-for-sale securities		25,654	16,485
Long-term debt		7,908	8,568
Amortized Cost (1)		12,619	9,255
Other Securities		649	418
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases		108,385	80,477
Level 1 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0	0
Loans held for sale		0	0
Available-for-sale securities		5	5
Long-term debt		0	0
Amortized Cost (1)		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]
Debt Securities, Trading, and Equity Securities, FV-NI		77	62
Loans held for sale		1,297	1,198
Available-for-sale securities		22,014	13,510
Long-term debt		7,147	7,999
Amortized Cost (1)		12,619	9,255
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases		119	71
Level 3 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI		0	0
Loans held for sale		38	77
Available-for-sale securities		3,635	2,970
Long-term debt		761	569
Amortized Cost (1)		0	0
Assets measured at fair value on a nonrecurring basis
Net loans and direct financing leases		108,266	80,406
Nonrecurring Basis
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans			$ (144)
Nonrecurring Basis | Fair Value
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans		(18)
Loans Held-for-sale, Fair Value Disclosure		0
Nonrecurring Basis | Total Gains/(Losses)
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans		(2)
Loans Held-for-sale, Fair Value Disclosure		1
Nonrecurring Basis | Level 1 | Fair Value
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans		0
Nonrecurring Basis | Level 2 | Fair Value
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans		0
Nonrecurring Basis | Level 3 | Fair Value
Assets measured at fair value on a nonrecurring basis
Collateral-dependent loans		(18)
Loans Held-for-sale, Fair Value Disclosure		$ 0
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

FAIR VALUES OF ASSETS AND LI_10

FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details) $ in Millions	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Disclosures [Abstract]
Gross amounts of recognized assets	$ 1,586	$ 1,946
Derivative Liability, Fair Value, Gross Liability	1,063	1,033
Available-for-sale securities	25,654	16,485
Consumer loans	139	94
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
Fair Value
Fair Value Disclosures [Abstract]
Available-for-sale securities	25,654	16,485
Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
MSRs	338	210
Available-for-sale securities	25,654	16,485
Loans Held-for-sale, Fair Value Disclosure	1,297	1,198
Fair Value, Measurements, Nonrecurring | Fair Value
Fair Value Disclosures [Abstract]
Loans Held-for-sale, Fair Value Disclosure	0
Level 3 | Fair Value
Fair Value Disclosures [Abstract]
Gross amounts of recognized assets	19	43
Derivative Liability, Fair Value, Gross Liability	7	2
Available-for-sale securities	3,635	2,970
Level 3 | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
MSRs	338	210
Gross amounts of recognized assets	19	43
Derivative Liability, Fair Value, Gross Liability	7	2
Available-for-sale securities	3,635	2,970
Consumer loans	20	23
Loans Held-for-sale, Fair Value Disclosure	0	0
Level 3 | Fair Value, Measurements, Nonrecurring | Fair Value
Fair Value Disclosures [Abstract]
Loans Held-for-sale, Fair Value Disclosure	0
Residential MBS
Fair Value Disclosures [Abstract]
Available-for-sale securities	14,337	7,935
Residential MBS | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	14,337	7,935
Residential MBS | Level 3 | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	$ 0	$ 0
Residential MBS | Maximum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Constant Prepayment Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.21	0.24
Residential MBS | Maximum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Option Adjusted Spread [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.11	0.11
Residential MBS | Minimum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Constant Prepayment Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.08	0.08
Residential MBS | Minimum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Option Adjusted Spread [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.03	0.04
Residential MBS | Weighted Average | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Constant Prepayment Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.12	0.17
Residential MBS | Weighted Average | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Option Adjusted Spread [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Servicing Asset, Measurement Input	0.05	0.05
Asset-backed securities
Fair Value Disclosures [Abstract]
Available-for-sale securities	$ 285	$ 192
Asset-backed securities | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	285	192
Asset-backed securities | Level 3 | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	35	10
Municipal securities
Fair Value Disclosures [Abstract]
Available-for-sale securities	3,634	3,004
Municipal securities | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	3,634	3,004
Municipal securities | Level 3 | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	3,582	2,951
Corporate debt
Fair Value Disclosures [Abstract]
Available-for-sale securities	1,773	445
Corporate debt | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	1,773	445
Corporate debt | Level 3 | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Available-for-sale securities	$ 0	$ 0
Corporate debt | Maximum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Discount Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.02	0.01
Corporate debt | Maximum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.64	0.39
Corporate debt | Maximum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Loss Severity [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.90	0.80
Corporate debt | Minimum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Discount Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0	0
Corporate debt | Minimum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0	0
Corporate debt | Minimum | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Loss Severity [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.05	0.05
Corporate debt | Weighted Average | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Discount Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.01	0.01
Corporate debt | Weighted Average | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Default Rate [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.05	0.04
Corporate debt | Weighted Average | Valuation Technique, Discounted Cash Flow [Member] | Level 3 | Measurement Input, Loss Severity [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Debt Securities, Available-for-sale, Measurement Input	0.24	0.25
Derivative Financial Instruments, Assets [Member] | Maximum | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Net Market Price [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input	0.10	0.11
Derivative Financial Instruments, Assets [Member] | Maximum | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Estimated Pull Thru [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input	1	1
Derivative Financial Instruments, Assets [Member] | Minimum | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Net Market Price [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input	(0.04)	(0.04)
Fair Value Disclosures [Abstract]
Loans held for investment, Measurement Input	0.01
Derivative Financial Instruments, Assets [Member] | Minimum | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Estimated Pull Thru [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input	0.06	0.01
Derivative Financial Instruments, Assets [Member] | Minimum | Market Approach Valuation Technique | Level 3 | Measurement Input, Estimated Pull Thru [Member] | Fair Value, Measurements, Recurring
Fair Value Disclosures [Abstract]
Loans held for investment, Measurement Input	0.90
Derivative Financial Instruments, Assets [Member] | Weighted Average | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Net Market Price [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input		0.03
Derivative Financial Instruments, Assets [Member] | Weighted Average | Valuation Technique, Consensus Pricing Model [Member] | Level 3 | Measurement Input, Estimated Pull Thru [Member] | Fair Value, Measurements, Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Asset, Measurement Input		0.88

FAIR VALUES OF ASSETS AND LI_11

FAIR VALUES OF ASSETS AND LIABILITIES - Balance Sheet Location (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Financial Assets:
Fair Value		$ 25,654	$ 16,485
Held-to-maturity securities		12,455	8,861
Loans held for sale	[1]	1,335	1,275
Net loans and direct financing leases		108,460	79,794
Derivatives		900	1,057
Derivative Asset, Fair Value, Gross Asset		1,586	1,946
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(686)	(889)
Financial Liabilities:
Total deposits		141,898	98,948
Short-term borrowings		435	183
Long-term borrowings		7,779	8,352
Derivatives		250	116
Derivative Liability, Fair Value, Gross Liability		1,063	1,033
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(813)	(917)
Reported Value Measurement [Member]
Financial Assets:
Cash and short term assets		10,188	6,712
Trading account securities		77	62
Fair Value		25,654	16,485
Held-to-maturity securities		12,455	8,861
Other Securities		649	418
Loans held for sale		1,335	1,275
Net loans and direct financing leases		108,460	79,794
Derivatives		900	1,057
Assets Held-in-trust, Current		151	73
Financial Liabilities:
Total deposits		141,898	98,948
Short-term borrowings		435	183
Long-term borrowings		7,779	8,352
Derivatives		250	116
Estimate of Fair Value Measurement [Member]
Financial Assets:
Cash and short term assets		10,188	6,712
Trading account securities		77	62
Fair Value		25,654	16,485
Held-to-maturity securities		12,619	9,255
Other Securities		649	418
Loans held for sale		1,335	1,275
Other securities (2)		86	59
Net loans and direct financing leases		108,385	80,477
Derivatives		900	1,057
Assets Held-in-trust, Current		151	73
Financial Liabilities:
Total deposits		142,261	99,021
Short-term borrowings		435	183
Long-term borrowings		7,908	8,568
Derivatives		250	116
Estimate of Fair Value Measurement [Member] | Level 1
Financial Assets:
Trading account securities		0	0
Fair Value		5	5
Held-to-maturity securities		0	0
Loans held for sale		0	0
Other securities (2)		62	59
Net loans and direct financing leases		0	0
Financial Liabilities:
Total deposits		0	0
Short-term borrowings		0	0
Long-term borrowings		0	0
Estimate of Fair Value Measurement [Member] | Level 2
Financial Assets:
Trading account securities		77	62
Fair Value		22,014	13,510
Held-to-maturity securities		12,619	9,255
Loans held for sale		1,297	1,198
Other securities (2)		24	0
Net loans and direct financing leases		119	71
Derivative Asset, Fair Value, Gross Asset		1,567	1,903
Financial Liabilities:
Total deposits		137,142	96,656
Short-term borrowings		435	183
Long-term borrowings		7,147	7,999
Derivative Liability, Fair Value, Gross Liability		1,056	1,031
Estimate of Fair Value Measurement [Member] | Level 3
Financial Assets:
Trading account securities		0	0
Fair Value		3,635	2,970
Held-to-maturity securities		0	0
Loans held for sale		38	77
Other securities (2)		0	0
Net loans and direct financing leases		108,266	80,406
Derivative Asset, Fair Value, Gross Asset		19	43
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		686	889
Financial Liabilities:
Total deposits		5,119	2,365
Short-term borrowings		0	0
Long-term borrowings		761	569
Derivative Liability, Fair Value, Gross Liability		7	2
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(813)	(917)
Fair Value, Recurring [Member]
Financial Assets:
Trading account securities		77
Fair Value		25,654	16,485
Derivatives		900	1,057
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(686)	(889)
Financial Liabilities:
Derivatives		250	116
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		(813)	(917)
Fair Value, Recurring [Member] | Level 1
Financial Assets:
Trading account securities		0
Fair Value		5	5
Derivative Asset, Fair Value, Gross Asset		0	0
Financial Liabilities:
Derivative Liability, Fair Value, Gross Liability		0	0
Fair Value, Recurring [Member] | Level 2
Financial Assets:
Trading account securities		77
Fair Value		22,014	13,510
Derivative Asset, Fair Value, Gross Asset		1,567	1,903
Financial Liabilities:
Derivative Liability, Fair Value, Gross Liability		1,056	1,031
Fair Value, Recurring [Member] | Level 3
Financial Assets:
Trading account securities		0
Fair Value		3,635	2,970
Derivative Asset, Fair Value, Gross Asset		19	43
Financial Liabilities:
Derivative Liability, Fair Value, Gross Liability		7	2
Other securities | Fair Value, Recurring [Member]
Financial Assets:
Fair Value		4	4
Other securities | Fair Value, Recurring [Member] | Level 1
Financial Assets:
Fair Value		0	0
Other securities | Fair Value, Recurring [Member] | Level 2
Financial Assets:
Fair Value		4	4
Other securities | Fair Value, Recurring [Member] | Level 3
Financial Assets:
Fair Value		0	0
Amortized Cost [Member] | Reported Value Measurement [Member]
Financial Assets:
Cash and short term assets		10,188	6,712
Held-to-maturity securities		12,455	8,861
Other Securities		563	359
Net loans and direct financing leases		108,321	79,700
Financial Liabilities:
Total deposits		141,898	98,948
Short-term borrowings		435	183
Long-term borrowings		7,779	8,352
Fair Value Fair Value Option [Member] | Reported Value Measurement [Member]
Financial Assets:
Trading account securities		77	62
Fair Value		25,654	16,485
Other Securities		86	59
Loans held for sale		1,297	1,198
Net loans and direct financing leases		139	94
Derivatives		900	1,057
Assets Held-in-trust, Current		151	73
Financial Liabilities:
Derivatives		250	116
LowerOfCostOrMarket [Member] | Reported Value Measurement [Member]
Financial Assets:
Loans held for sale		$ 38	$ 77
[1]	Amounts represent loans for which Huntington has elected the fair value option. See Note 13 “ Fair Values of Assets and Liabilities ”.

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)group	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Derivative [Line Items]
Increase (decrease) to net interest income due to derivative adjustment	$ 61	$ 82	$ 291	$ 151
Fair value hedging adjustments			(35)		$ (62)
Derivative, Notional Amount	20,324		20,324		33,327
Credit risks from interest rate swaps used for trading purposes	787		787		882
Derivative Liability	250		$ 250		116
Number of primary groups | group			2
Aggregate credit risk, net of collateral	113		$ 113		175
Investment securities and cash collateral pledged by Huntington	486		486
Investment securities and cash collateral pledged to Huntington	264		264
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	(29)	$ (40)	$ (102)	$ 279
Derivative, Remaining Maturity			1 year
Loans Payable [Member]
Derivative [Line Items]
Derivative, Notional Amount	8,196		$ 8,196		18,646
Derivative used in trading activity
Derivative [Line Items]
Net derivative asset (liability)	53		53		70
Derivative financial instruments used by Huntington on behalf of customers including offsetting derivatives, notional value	53,000		53,000		37,000
Derivative used in Mortgage Banking Activities
Derivative [Line Items]
Derivative, Notional Amount	1,153		1,153		1,170
Derivative, Fair Value, Net	34		34		26
Foreign Exchange Forward
Derivative [Line Items]
Derivative, Notional Amount	209		209
Fair Value Hedging | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount	12,128		12,128		9,681
Fair Value Hedging | Designated as Hedging Instrument [Member] | Loans Payable [Member]
Derivative [Line Items]
Derivative, Notional Amount	0		0		0
Cash Flow Hedging | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount	7,925		7,925		17,375
Cash Flow Hedging | Designated as Hedging Instrument [Member] | Loans Payable [Member]
Derivative [Line Items]
Derivative, Notional Amount	7,925		7,925		17,375
Commitments to Sell Loans [Member]
Derivative [Line Items]
Commitments to sell residential real estate loans	$ 2,700		$ 2,700		$ 2,900

DERIVATIVE FINANCIAL INSTRUME_4

DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 20,324	$ 33,327
Asset derivatives included in accrued income and other assets
Total contracts	1,586	1,946
Liability derivatives included in accrued expenses and other liabilities
Total contracts	1,063	1,033
Accrued income and other assets
Asset derivatives included in accrued income and other assets
Interest rate contracts not designated as hedging instruments	772	1,074
Foreign exchange contracts not designated as hedging instruments	35	46
Commodities contracts not designated as hedging instruments	353	107
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	13	0
Total contracts	1,586	1,946
Accrued expenses and other liabilities
Liability derivatives included in accrued expenses and other liabilities
Interest rate contracts not designated as hedging instruments	665	828
Foreign exchange contracts not designated as hedging instruments	30	47
Commodities contracts not designated as hedging instruments	351	103
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	5	4
Total contracts	1,063	1,033
Interest Rate Contract [Member] | Accrued income and other assets
Asset derivatives included in accrued income and other assets
Interest rate contracts designated as hedging instruments	413	719
Interest Rate Contract [Member] | Accrued expenses and other liabilities
Liability derivatives included in accrued expenses and other liabilities
Interest rate contracts designated as hedging instruments	12	51
Foreign Exchange Contract [Member] | Accrued income and other assets
Asset derivatives included in accrued income and other assets
Interest rate contracts designated as hedging instruments	0	0
Foreign Exchange Contract [Member] | Accrued expenses and other liabilities
Liability derivatives included in accrued expenses and other liabilities
Interest rate contracts designated as hedging instruments	0	0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	20,053	27,056
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	209	0
Not Designated as Hedging Instrument [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	79,879	76,738
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	54,089	44,495
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,568	2,718
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,255	1,952
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Accrued income and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 705	$ 517

DERIVATIVE FINANCIAL INSTRUME_5

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) (Details) - Not Designated as Hedging Instrument [Member] - Fair Value Hedging - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 20	$ 63	$ 109	$ 165
Interest Rate Contract [Member] | Capital markets fees
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	13	10	37	39
Interest Rate Contract [Member] | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	5	47	(24)	109
Interest Rate Floor [Member] | Other noninterest expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(4)	0	(8)	0
Foreign Exchange Contract [Member] | Capital markets fees
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	9	7	22	18
Commodity Contract [Member] | Capital markets fees
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(1)	0	(1)	2
Equity Contract [Member] | Other noninterest expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(2)	(1)	(6)	(3)
Interest Rate Cap | Other noninterest expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 0	$ 0	$ 89	$ 0

DERIVATIVE FINANCIAL INSTRUME_6

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Notional Disclosures [Abstract]
Derivative, Notional Amount	$ 20,324	$ 33,327
Not Designated as Hedging Instrument, Economic Hedge
Notional Disclosures [Abstract]
Derivative, Notional Amount	271	6,271
Fair Value Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	12,128	9,681
Cash Flow Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,925	17,375
Loans Payable [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	8,196	18,646
Loans Payable [Member] | Not Designated as Hedging Instrument, Economic Hedge
Notional Disclosures [Abstract]
Derivative, Notional Amount	271	1,271
Loans Payable [Member] | Fair Value Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	0
Loans Payable [Member] | Cash Flow Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,925	17,375
Securities Investment [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,372	3,484
Securities Investment [Member] | Not Designated as Hedging Instrument, Economic Hedge
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	0
Securities Investment [Member] | Fair Value Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	7,372	3,484
Securities Investment [Member] | Cash Flow Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	0
Other long-term debt
Notional Disclosures [Abstract]
Derivative, Notional Amount	4,756	11,197
Other long-term debt | Not Designated as Hedging Instrument, Economic Hedge
Notional Disclosures [Abstract]
Derivative, Notional Amount	0	5,000
Other long-term debt | Fair Value Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	4,756	6,197
Other long-term debt | Cash Flow Hedging | Designated as Hedging Instrument [Member]
Notional Disclosures [Abstract]
Derivative, Notional Amount	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUME_7

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management Add Info (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Notional Amount	$ 20,324		$ 20,324		$ 33,327
Increase decrease to net interest income due to derivative adjustment	$ 61	$ 82	$ 291	$ 151

DERIVATIVE FINANCIAL INSTRUME_8

DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Fair value hedging adjustments			$ 35		$ 62
Investment Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amortized Cost	$ 17,630		17,630		6,637
Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items	2		2		3
Amortized cost basis of the closed portfolios used in hedging relationships	17,200		17,200
Designated hedged items	7,000		7,000
Hedged Asset, Fair Value Hedge, Last-of-Layer, Cumulative Increase (Decrease)	1		1
Subordinated notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amortized Cost	4,882		4,882		6,383
Cumulative Amount of Fair Value Hedging Adjustment To Hedged Items	135		135		$ 232
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Designated hedged items	400		400
Interest income available for sale securities taxable [Member] | Investment Securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value for derivatives designated as fair value hedges	2	$ 0	39	$ (1)
Interest income available for sale securities taxable [Member] | Hedged investment securities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value for derivatives designated as fair value hedges	0	0	(40)	1
Interest expense subordinated notes and other long term debt [Member] | Subordinated notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value for derivatives designated as fair value hedges	(22)	(36)	(95)	159
Interest expense subordinated notes and other long term debt [Member] | Hedged Subordinated notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value for derivatives designated as fair value hedges	$ 22	$ 35	$ 96	$ (160)

DERIVATIVE FINANCIAL INSTRUME_9

DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ (29)	$ (40)	$ (102)	$ 279
Derivative, Notional Amount	20,324		20,324		$ 33,327
Loans Payable [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 8,196		$ 8,196		$ 18,646

DERIVATIVE FINANCIAL INSTRUM_10

DERIVATIVE FINANCIAL INSTRUMENTS - MSR Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 20,324		$ 20,324		$ 33,327
Derivative used in Mortgage Banking Activities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Fair Value, Net	34		34		26
Derivative, Notional Amount	1,153		1,153		1,170
Trading Assets	17		17		$ 43
Derivative, Gain (Loss) on Derivative, Net	$ (4)	$ (1)	$ (28)	$ 61

DERIVATIVE FINANCIAL INSTRUM_11

DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Offsetting Derivative Assets [Abstract]
Gross amounts of recognized assets	$ 1,586	$ 1,946
Gross amounts offset in the condensed consolidated balance sheets	686	889
Net amounts of assets presented in the condensed consolidated balance sheets	900	1,057
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments	(81)	(112)
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral received	(61)	(142)
Net amount	$ 758	$ 803

DERIVATIVE FINANCIAL INSTRUM_12

DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Offsetting Derivative Liabilities [Abstract]
Gross amounts of recognized liabilities	$ 1,063	$ 1,033
Gross amounts offset in the condensed consolidated balance sheets	(813)	(917)
Derivatives	250	116
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments	0	(9)
Gross amounts not offset in the condensed consolidated balance sheets, Cash collateral received	(225)	(105)
Net amount	$ 25	$ 2

VIEs - Narrative (Details)

VIEs - Narrative (Details)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Maximum year to defer payment of interest on Debenture	5 years

VIEs - Unconsolidated VIEs (Det

VIEs - Unconsolidated VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Total Assets	$ 173,878	$ 123,038
Total Liabilities	154,379	110,045
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	1,876	1,278
Total Liabilities	1,175	824
Maximum Exposure to Loss	1,862	1,264
Trust Preferred Securities | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	14	14
Total Liabilities	256	252
Maximum Exposure to Loss	0	0
Affordable Housing Tax Credit Partnerships | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	1,436	956
Total Liabilities	774	500
Maximum Exposure to Loss	1,436	956
Other Investments | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	426	308
Total Liabilities	145	72
Maximum Exposure to Loss	$ 426	$ 308

VIEs - Trust Preferred Securiti

VIEs - Trust Preferred Securities (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Long-term Debt, Gross	$ 256
Investment in unconsolidated subsidiary	$ 14
Huntington Capital I [Member] | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Basis spread on variable rate	0.70%
Huntington Capital I [Member] | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.83%
Long-term Debt, Gross	$ 70
Investment in unconsolidated subsidiary	$ 7
Huntington Capital II | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Basis spread on variable rate	0.625%
Huntington Capital II | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.76%
Long-term Debt, Gross	$ 32
Investment in unconsolidated subsidiary	$ 3
Sky Financial Capital Trust III | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Basis spread on variable rate	1.40%
Sky Financial Capital Trust III | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.53%
Long-term Debt, Gross	$ 72
Investment in unconsolidated subsidiary	$ 2
Sky Financial Capital Trust IV | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.53%
Long-term Debt, Gross	$ 74
Investment in unconsolidated subsidiary	$ 2
First Place Capital Trust I | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Basis spread on variable rate	2.85%
First Place Capital Trust I | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.00%
Long-term Debt, Gross	$ 4
Investment in unconsolidated subsidiary	$ 0
First Place Capital Trust II | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	6.45%
Long-term Debt, Gross	$ 4
Investment in unconsolidated subsidiary	$ 0

VIEs - Low Income Housing Tax C

VIEs - Low Income Housing Tax Credit Partnerships (Details) - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Affordable Housing Tax Credit Partnerships
Variable Interest Entity [Line Items]
Affordable housing tax credit investments	$ 2,134		$ 2,134		$ 1,568
Less: amortization	(698)		(698)		(612)
Net affordable housing tax credit investments	1,436		1,436		956
Unfunded commitments	774		774		$ 500
Tax credits and other tax benefits recognized	36	$ 29	113	$ 88
Proportional Amortization Method
Variable Interest Entity [Line Items]
Proportional amortization expense included in provision for income taxes	$ 34	$ 25	$ 92	$ 75

COMMITMENTS AND CONTINGENT LI_3

COMMITMENTS AND CONTINGENT LIABILITIES - Commitments to Extend Credit (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Commercial
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	$ 28,226	$ 20,701
Consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	18,982	14,808
Commercial real estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	2,576	1,313
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	904	581
Commercial | Commercial letters-of-credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount represents credit risk	$ 15	$ 21

COMMITMENTS AND CONTINGENT LI_4

COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Maturity period of Commercial letters of credit	90 days
Standby Bond Purchase Commitment, Expiration Period	2 years
Standby letters of credit
Loss Contingencies [Line Items]
Carrying amount of deferred revenue associated with guarantees	$ 6	$ 5
Outstanding standby letters of credit	904	$ 581
Maximum
Loss Contingencies [Line Items]
Aggregate range of reasonably possible losses current legal proceedings	15
Minimum
Loss Contingencies [Line Items]
Aggregate range of reasonably possible losses current legal proceedings	$ 0

SEGMENT REPORTING (Details)

SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)Reportable_segment	Sep. 30, 2021USD ($)numberOfSegments	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Segment Reporting Information [Line Items]
Number of reporting segments				4	4
Net interest income	$ 1,160,000	$ 817,000	$ 2,970,000			$ 2,399,000
Provision (reduction in allowance) for credit losses	62,000	(177,000)	(89,000)			(945,000)
Noninterest income	535,000	430,000	1,374,000			1,182,000
Noninterest expense	1,289,000	712,000	3,154,000			2,039,000
Provision (benefit) for income taxes	90,000	55,000	206,000			96,000
Income attributable to non-controlling interest	1,000	0	1,000			0
Net income attributable to Huntington Bancshares Inc	377,000	303,000	894,000			501,000
Total Assets	173,878,000		173,878,000	$ 173,878,000	$ 173,878,000		$ 123,038,000
Total deposits	141,898,000		141,898,000	141,898,000	141,898,000		98,948,000
Operating Segments | Consumer & Business Banking
Segment Reporting Information [Line Items]
Net interest income	483,000	367,000	1,187,000			1,099,000
Provision (reduction in allowance) for credit losses	7,000	(87,000)	(57,000)			(200,000)
Noninterest income	302,000	274,000	780,000			704,000
Noninterest expense	637,000	450,000	1,617,000			1,288,000
Provision (benefit) for income taxes	33,000	22,000	62,000			66,000
Income attributable to non-controlling interest	0	0	0			0
Net income attributable to Huntington Bancshares Inc	122,000	82,000	231,000			249,000
Total Assets	41,656,000		41,656,000	41,656,000	41,656,000		30,758,000
Total deposits	94,439,000		94,439,000	94,439,000	94,439,000		60,910,000
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Net interest income	416,000	221,000	873,000			693,000
Provision (reduction in allowance) for credit losses	34,000	(87,000)	(107,000)			(611,000)
Noninterest income	150,000	90,000	353,000			261,000
Noninterest expense	247,000	135,000	553,000			400,000
Provision (benefit) for income taxes	73,000	19,000	119,000			(12,000)
Income attributable to non-controlling interest	1,000	0	1,000			0
Net income attributable to Huntington Bancshares Inc	279,000	70,000	446,000			(45,000)
Total Assets	54,671,000		54,671,000	54,671,000	54,671,000		36,311,000
Total deposits	32,531,000		32,531,000	32,531,000	32,531,000		24,766,000
Operating Segments | Vehicle Finance [Member]
Segment Reporting Information [Line Items]
Net interest income	123,000	110,000	340,000			316,000
Provision (reduction in allowance) for credit losses	25,000	12,000	77,000			(118,000)
Noninterest income	4,000	2,000	9,000			7,000
Noninterest expense	48,000	34,000	119,000			103,000
Provision (benefit) for income taxes	22,000	19,000	64,000			21,000
Income attributable to non-controlling interest	0	0	0			0
Net income attributable to Huntington Bancshares Inc	82,000	71,000	243,000			81,000
Total Assets	20,122,000		20,122,000	20,122,000	20,122,000		19,789,000
Total deposits	1,437,000		1,437,000	1,437,000	1,437,000		722,000
Operating Segments | RBPCG
Segment Reporting Information [Line Items]
Net interest income	42,000	39,000	113,000			122,000
Provision (reduction in allowance) for credit losses	(4,000)	(15,000)	(2,000)			(16,000)
Noninterest income	58,000	47,000	165,000			151,000
Noninterest expense	84,000	56,000	217,000			181,000
Provision (benefit) for income taxes	3,000	3,000	12,000			16,000
Income attributable to non-controlling interest	0	0	0			0
Net income attributable to Huntington Bancshares Inc	9,000	12,000	47,000			60,000
Total Assets	8,114,000		8,114,000	8,114,000	8,114,000		7,064,000
Total deposits	9,025,000		9,025,000	9,025,000	9,025,000		7,635,000
Treasury / Other
Segment Reporting Information [Line Items]
Net interest income	96,000	80,000	457,000			169,000
Provision (reduction in allowance) for credit losses	0	0	0			0
Noninterest income	21,000	17,000	67,000			59,000
Noninterest expense	273,000	37,000	648,000			67,000
Provision (benefit) for income taxes	(41,000)	(8,000)	(51,000)			5,000
Income attributable to non-controlling interest	0	0	0			0
Net income attributable to Huntington Bancshares Inc	(115,000)	$ 68,000	(73,000)			$ 156,000
Total Assets	49,315,000		49,315,000	49,315,000	49,315,000		29,116,000
Total deposits	$ 4,466,000		$ 4,466,000	$ 4,466,000	$ 4,466,000		$ 4,915,000