First Horizon (FHN) 10-Q7 Nov 232023 Q3 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2023	Oct. 31, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-15185
Entity Registrant Name	FIRST HORIZON CORP
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-0803242
Entity Address, Address Line One	165 Madison Avenue
Entity Address, City or Town	Memphis,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	38103
City Area Code	901
Local Phone Number	523-4444
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		558,769,520
Entity Central Index Key	0000036966
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
$.625 Par Value Common Capital Stock
Entity Information [Line Items]
Title of 12(b) Security	$.625 Par Value Common Capital Stock
Trading Symbol	FHN
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/400th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series B
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol	FHN PR B
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/400th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series C
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol	FHN PR C
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/400th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series D
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/400th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series D
Trading Symbol	FHN PR D
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/4,000th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series E
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/4,000th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol	FHN PR E
Security Exchange Name	NYSE
Depositary Shares, each representing a 1/4,000th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series F
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/4,000th interest ina share of Non-Cumulative Perpetual Preferred Stock, Series F
Trading Symbol	FHN PR F
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 1,022	$ 1,061
Interest-bearing deposits with banks	1,917	1,384
Federal funds sold and securities purchased under agreements to resell	416	482
Trading securities	1,231	1,375
Securities available for sale at fair value	8,100	8,836
Securities held to maturity (fair value of $1,104 and $1,209, respectively)	1,335	1,371
Loans held for sale (including $88 and $51 at fair value, respectively)	613	590
Loans and leases	61,778	58,102
Allowance for loan and lease losses	(760)	(685)
Net loans and leases	61,018	57,417
Premises and equipment	590	612
Goodwill	1,511	1,511
Other intangible assets	198	234
Other assets	4,582	4,080
Total assets	82,533	78,953
Liabilities
Noninterest-bearing deposits	17,825	23,466
Interest-bearing deposits	49,190	40,023
Total deposits	67,015	63,489
Trading liabilities	366	335
Short-term borrowings	2,507	2,506
Term borrowings	1,157	1,597
Other liabilities	2,695	2,479
Total liabilities	73,740	70,406
Equity
Preferred stock, Non-cumulative perpetual, no par value; authorized 5,000,000 shares; issued 26,750 and 31,686 shares, respectively	520	1,014
Common stock, $0.625 par value; authorized 700,000,000 shares; issued 558,708,832 and 537,100,615 shares, respectively	349	336
Capital surplus	5,337	4,840
Retained earnings	3,874	3,430
Accumulated other comprehensive loss, net	(1,582)	(1,368)
FHN shareholders' equity	8,498	8,252
Noncontrolling interest	295	295
Total equity	8,793	8,547
Total liabilities and equity	$ 82,533	$ 78,953

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Securities held to maturity	$ 1,104	$ 1,209
Loans held-for-sale, at fair value	$ 88	$ 51
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	26,750	31,686
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	700,000,000	700,000,000
Common stock, shares issued (in shares)	558,708,832	537,100,615

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income
Interest and fees on loans and leases	$ 941	$ 617	$ 2,624	$ 1,553
Interest and fees on loans held for sale	15	9	40	30
Interest on investment securities	62	54	186	137
Interest on trading securities	19	15	57	39
Interest on other earning assets	43	38	107	68
Total interest income	1,080	733	3,014	1,827
Interest expense
Interest on deposits	409	43	845	72
Interest on trading liabilities	3	3	8	9
Interest on short-term borrowings	46	7	182	10
Interest on term borrowings	17	18	56	53
Total interest expense	475	71	1,091	144
Net interest income	605	662	1,923	1,683
Provision for credit losses	110	60	210	50
Net interest income after provision for credit losses	495	602	1,713	1,633
Noninterest income
Deposit transactions and cash management	46	43	133	129
Fixed income	28	46	97	170
Brokerage, management fees and commissions	21	23	66	71
Card and digital banking fees	20	21	61	64
Other service charges and fees	14	13	41	41
Trust services and investment management	12	11	35	36
Mortgage banking and title income	7	9	18	65
Deferred compensation income	0	(3)	11	(24)
Gain on merger termination	0	0	225	0
Securities gains (losses), net	0	12	1	18
Other income	25	38	57	72
Total noninterest income	173	213	745	642
Noninterest expense
Personnel expense	266	275	821	820
Net occupancy expense	30	32	92	96
Computer software	26	28	82	85
Operations services	21	22	65	65
Advertising and public relations	16	12	47	34
Deposit insurance expense	14	8	40	23
Legal and professional fees	13	10	33	50
Contract employment and outsourcing	12	12	36	43
Amortization of intangible assets	12	13	36	39
Equipment expense	11	11	32	34
Communications and delivery	8	10	27	28
Contributions	3	3	60	5
Other expense	42	33	137	128
Total noninterest expense	474	469	1,508	1,450
Income (loss) before income taxes	194	346	950	825
Income tax expense	52	78	223	183
Net income	142	268	727	642
Net income attributable to noncontrolling interest	5	3	14	8
Net income attributable to controlling interest	137	265	713	634
Preferred stock dividends	8	8	24	24
Net income available to common shareholders	129	257	689	610
Net income available to common shareholders	$ 129	$ 257	$ 689	$ 610
Basic earnings per common share (in dollars per share)	$ 0.23	$ 0.48	$ 1.26	$ 1.14
Diluted earnings per common share (in dollars per share)	$ 0.23	$ 0.45	$ 1.23	$ 1.08
Weighted average common shares (in shares)	558,559	535,986	544,952	534,613
Diluted average common shares (in shares)	561,421	570,153	561,930	563,538

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statements of Comprehensive Income/(loss)
Net income	$ 142	$ 268	$ 727	$ 642
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	(206)	(368)	(197)	(1,003)
Net unrealized gains (losses) on cash flow hedges	(20)	(99)	(22)	(142)
Net unrealized gains (losses) on pension and other postretirement plans	3	3	5	6
Other comprehensive income (loss)	(223)	(464)	(214)	(1,139)
Comprehensive income (loss)	(81)	(196)	513	(497)
Comprehensive income attributable to noncontrolling interest	5	3	14	8
Comprehensive income (loss) attributable to controlling interest	(86)	(199)	499	(505)
Income tax expense (benefit) of items included in other comprehensive income:
Net unrealized gains (losses) on securities available for sale	(67)	(119)	(65)	(324)
Net unrealized gains (losses) on cash flow hedges	(6)	(32)	(7)	(46)
Net unrealized gains (losses) on pension and other postretirement plans	$ 1	$ 1	$ 2	$ 2

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest	Preferred Stock	Series G	Series G Common Stock	Series G Capital Surplus
Preferred stock, balance, beginning of period (in shares) at Dec. 31, 2021		26,750,000
Common stock, balance, beginning of period (in shares) at Dec. 31, 2021			533,577,000
Balance, beginning of period at Dec. 31, 2021	$ 8,494	$ 520	$ 333	$ 4,743	$ 2,891	$ (288)	[1]	$ 295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	198				195			3
Other comprehensive income (loss)	(423)					(423)	[1]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Preferred stock issuance (in shares)		4,936,000
Preferred stock issuance	494	$ 494
Common stock repurchased (in shares)			(120,000)
Common stock repurchased	(2)			(2)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			1,130,000
Stock options exercised and restricted stock awards	15		$ 1	14
Stock-based compensation expense	14			14
Dividends declared - noncontrolling interest of subsidiary preferred stock	(3)							(3)
Preferred stock, balance, ending of period (in shares) at Mar. 31, 2022		31,686,000
Common stock, balance, ending of period (in shares) at Mar. 31, 2022			534,587,000
Balance, end of period at Mar. 31, 2022	8,697	$ 1,014	$ 334	4,769	2,996	(711)	[1]	295
Preferred stock, balance, beginning of period (in shares) at Dec. 31, 2021		26,750,000
Common stock, balance, beginning of period (in shares) at Dec. 31, 2021			533,577,000
Balance, beginning of period at Dec. 31, 2021	8,494	$ 520	$ 333	4,743	2,891	(288)	[1]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	642
Other comprehensive income (loss)	(1,139)
Cash dividends declared:
Preferred stock	(24)
Common stock issued for:
Series G preferred stock conversion	0
Preferred stock, balance, ending of period (in shares) at Sep. 30, 2022		31,686,000
Common stock, balance, ending of period (in shares) at Sep. 30, 2022			536,737,000
Balance, end of period at Sep. 30, 2022	8,283	$ 1,014	$ 335	4,812	3,254	(1,427)	[1]	295
Preferred stock, balance, beginning of period (in shares) at Dec. 31, 2021		26,750,000
Common stock, balance, beginning of period (in shares) at Dec. 31, 2021			533,577,000
Balance, beginning of period at Dec. 31, 2021	8,494	$ 520	$ 333	4,743	2,891	(288)	[1]	295
Preferred stock, balance, ending of period (in shares) at Dec. 31, 2022		31,686,000
Common stock, balance, ending of period (in shares) at Dec. 31, 2022			537,101,000
Balance, end of period at Dec. 31, 2022	8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
Balance, end of period (Accounting Standards Update 2022-02) at Dec. 31, 2022	$ 4				4
Common stock issued for:
Accounting Standards Update [Extensible List]	Accounting Standards Update 2022-02
Preferred stock, balance, beginning of period (in shares) at Mar. 31, 2022		31,686,000
Common stock, balance, beginning of period (in shares) at Mar. 31, 2022			534,587,000
Balance, beginning of period at Mar. 31, 2022	$ 8,697	$ 1,014	$ 334	4,769	2,996	(711)	[1]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	177				174			3
Other comprehensive income (loss)	(252)					(252)	[1]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(83)				(83)
Common stock repurchased (in shares)			(334,000)
Common stock repurchased	(8)		$ (1)	(7)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			2,080,000
Stock options exercised and restricted stock awards	13		$ 2	11
Stock-based compensation expense	18			18
Dividends declared - noncontrolling interest of subsidiary preferred stock	(3)							(3)
Preferred stock, balance, ending of period (in shares) at Jun. 30, 2022		31,686,000
Common stock, balance, ending of period (in shares) at Jun. 30, 2022			536,333,000
Balance, end of period at Jun. 30, 2022	8,551	$ 1,014	$ 335	4,791	3,079	(963)	[1]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	268				265			3
Other comprehensive income (loss)	(464)					(464)	[1]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Common stock repurchased (in shares)			(103,000)
Common stock repurchased	(3)			(3)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			507,000
Stock options exercised and restricted stock awards	3			3
Stock-based compensation expense	21			21
Dividends declared - noncontrolling interest of subsidiary preferred stock	(3)							(3)
Preferred stock, balance, ending of period (in shares) at Sep. 30, 2022		31,686,000
Common stock, balance, ending of period (in shares) at Sep. 30, 2022			536,737,000
Balance, end of period at Sep. 30, 2022	8,283	$ 1,014	$ 335	4,812	3,254	(1,427)	[1]	295
Preferred stock, balance, beginning of period (in shares) at Dec. 31, 2022		31,686,000
Common stock, balance, beginning of period (in shares) at Dec. 31, 2022			537,101,000
Balance, beginning of period at Dec. 31, 2022	8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	255				251			4
Other comprehensive income (loss)	160					160	[2]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Common stock repurchased (in shares)			(159,000)
Common stock repurchased	(4)			(4)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			677,000
Stock options exercised and restricted stock awards	5			5
Stock-based compensation expense	22			22
Dividends declared - noncontrolling interest of subsidiary preferred stock	(4)							(4)
Preferred stock, balance, ending of period (in shares) at Mar. 31, 2023		31,686,000
Common stock, balance, ending of period (in shares) at Mar. 31, 2023			537,619,000
Balance, end of period at Mar. 31, 2023	8,895	$ 1,014	$ 336	4,863	3,595	(1,208)	[2]	295
Preferred stock, balance, beginning of period (in shares) at Dec. 31, 2022		31,686,000
Common stock, balance, beginning of period (in shares) at Dec. 31, 2022			537,101,000
Balance, beginning of period at Dec. 31, 2022	8,547	$ 1,014	$ 336	4,840	3,430	(1,368)	[2]	295
Balance, beginning of period (Accounting Standards Update 2022-02) at Dec. 31, 2022	4				4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	727
Other comprehensive income (loss)	(214)
Cash dividends declared:
Preferred stock	(24)
Common stock issued for:
Series G preferred stock conversion	$ 493
Preferred stock, balance, ending of period (in shares) at Sep. 30, 2023	26,750	26,750,000								0
Common stock, balance, ending of period (in shares) at Sep. 30, 2023			558,709,000
Balance, end of period at Sep. 30, 2023	$ 8,793	$ 520	$ 349	5,337	3,874	(1,582)	[2]	295
Preferred stock, balance, beginning of period (in shares) at Mar. 31, 2023		31,686,000
Common stock, balance, beginning of period (in shares) at Mar. 31, 2023			537,619,000
Balance, beginning of period at Mar. 31, 2023	8,895	$ 1,014	$ 336	4,863	3,595	(1,208)	[2]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	329				325			4
Other comprehensive income (loss)	(151)					(151)	[2]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(82)				(82)
Preferred stock conversion (in shares)									(4,936,000)
Preferred stock conversion	(494)								$ (494)
Common stock repurchased (in shares)			(575,000)
Common stock repurchased	(5)		$ 0	(5)
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			1,872,000
Stock options exercised and restricted stock awards	0
Series G preferred stock conversion to common stock (in shares)											19,743,000
Series G preferred stock conversion										$ 493	$ 12	$ 481
Stock-based compensation expense	(13)		$ 1	(14)
Dividends declared - noncontrolling interest of subsidiary preferred stock	(4)							(4)
Preferred stock, balance, ending of period (in shares) at Jun. 30, 2023		26,750,000
Common stock, balance, ending of period (in shares) at Jun. 30, 2023			558,659,000
Balance, end of period at Jun. 30, 2023	8,960	$ 520	$ 349	5,325	3,830	(1,359)	[2]	295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	142				137			5
Other comprehensive income (loss)	(223)					(223)	[2]
Cash dividends declared:
Preferred stock	(8)				(8)
Common stock	(85)				(85)
Common stock repurchased (in shares)			(17,000)
Common stock repurchased	0
Common stock issued for:
Stock options exercised and restricted stock awards (in shares)			67,000
Stock options exercised and restricted stock awards	0
Stock-based compensation expense	12			12
Dividends declared - noncontrolling interest of subsidiary preferred stock	$ (5)							(5)
Preferred stock, balance, ending of period (in shares) at Sep. 30, 2023	26,750	26,750,000								0
Common stock, balance, ending of period (in shares) at Sep. 30, 2023			558,709,000
Balance, end of period at Sep. 30, 2023	$ 8,793	$ 520	$ 349	$ 5,337	$ 3,874	$ (1,582)	[2]	$ 295

[1]Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.[2]Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Common stock - cash dividends declared per share (in dollars per share)	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15
Preferred Stock
Number of shares issued in transaction (in shares)						4,936
Preferred stock issuance, net of offering cost (in dollars per share)						$ 100,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities
Net income	$ 727	$ 642
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	210	50
Deferred income tax expense (benefit)	23	167
Depreciation and amortization of premises and equipment	41	45
Amortization of intangible assets	36	39
Net other amortization and accretion	14	(3)
Net (increase) decrease in trading securities	1,063	1,728
Net (increase) decrease in derivatives	(289)	822
Stock-based compensation expense	21	53
Securities (gains) losses, net	(1)	(18)
Loans held for sale:
Purchases and originations	(1,834)	(3,184)
Gross proceeds from settlements and sales	860	2,050
(Gain) loss due to fair value adjustments and other	32	78
Other operating activities, net	31	(183)
Total adjustments	207	1,644
Net cash provided by operating activities	934	2,286
Investing Activities
Proceeds from maturities of securities available for sale	678	1,080
Purchases of securities available for sale	(228)	(2,457)
Purchases of securities held to maturity	0	(712)
Proceeds from prepayments of securities held to maturity	40	40
Proceeds from sales of premises and equipment	1	17
Purchases of premises and equipment	(23)	(22)
Net (increase) decrease in loans and leases	(3,784)	(2,471)
Net (increase) decrease in interest-bearing deposits with banks	(533)	11,666
Other investing activities, net	16	14
Net cash (used in) provided by investing activities	(3,833)	7,155
Common stock:
Stock options exercised	5	30
Cash dividends paid	(251)	(243)
Repurchase of shares	(10)	(12)
Preferred stock:
Preferred stock issuance	0	494
Cash dividends paid - preferred stock - noncontrolling interest	(12)	(9)
Cash dividends paid - preferred stock	(24)	(24)
Net increase (decrease) in deposits	3,526	(8,880)
Net increase (decrease) in short-term borrowings	1	(707)
Repayment of term borrowing	(450)	0
Increases (decreases) in restricted and secured term borrowings	9	5
Net cash provided by (used in) financing activities	2,794	(9,346)
Net increase (decrease) in cash and cash equivalents	(105)	95
Cash and cash equivalents at beginning of period	1,543	1,788
Cash and cash equivalents at end of period	1,438	1,883
Supplemental Disclosures
Total interest paid	961	127
Total taxes paid	122	11
Total taxes refunded	15	4
Transfer from loans to OREO	3	3
Transfer from loans HFS to trading securities	919	1,548
Preferred stock conversion to common stock	$ 493	$ 0

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	9 Months Ended
Basis of Presentation and Accounting Policies	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Accounting Policies	Basis of Presentation and Accounting Policies The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all information and notes necessary for complete financial statements in accordance with GAAP. In the opinion of management, the accompanying unaudited consolidated financial statements contain all significant adjustments, consisting of normal and recurring items, considered necessary for fair presentation. These interim financial statements should be read in conjunction with FHN's audited consolidated financial statements and notes in FHN's Annual Report on Form 10-K for the year ended December 31, 2022. Operating results for the interim period are not necessarily indicative of the results that may be expected for the full year. All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts reported in prior years have been reclassified to conform to the current period presentation. See the Glossary of Acronyms and Terms included in this Report for terms used herein. TD Transaction As previously disclosed, on February 27, 2022, FHN entered into an Agreement and Plan of Merger (the TD Merger Agreement) with The Toronto-Dominion Bank, a Canadian chartered bank (TD), and certain TD subsidiaries. On May 4, 2023, FHN and TD mutually terminated the TD Merger Agreement. Under the terms of the termination agreement, TD made a $200 million cash payment to FHN, in addition to the $25 million fee reimbursement due to FHN pursuant to the TD Merger Agreement. Merger and integration planning expenses related to the transactions associated with the TD Merger Agreement (TD Transaction) are recorded in FHN’s Corporate segment. There were none of these expenses recognized during the three months ended September 30, 2023. Expenses recognized during the nine months ended September 30, 2023 were $51 million. Expenses recognized during the three and nine months ended September 30, 2022 were $21 million and $55 million, respectively. Accounting Changes With Extended Transition Periods In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting” which provides several optional expedients and exceptions to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The provisions of ASU 2020-04 primarily affect 1) contract modifications (e.g., loans, leases, debt, and derivatives) made in anticipation that a reference rate (e.g., LIBOR) will be discontinued and 2) the application of hedge accounting for existing relationships affected by those modifications. The provisions of ASU 2020-04 were effective upon release and apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. Including the adoption of ASU 2022-06 (discussed below), the expedients and exceptions provided by ASU 2020-04 do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2024, except for hedging relationships existing as of December 31, 2024, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. FHN identified contracts affected by reference rate reform, developed modification plans for those contracts and implemented those modifications before the last quotation of LIBOR on June 30, 2023. FHN elected to utilize the optional expedients and exceptions provided by ASU 2020-04 for contract modifications that immediately converted the reference rate within each contract. FHN also elected that revisions to contractual fallback provisions, including modifications in accordance with the provisions of Regulation ZZ, did not require evaluation for modification accounting. Additionally, FHN elected that the revisions to derivative contracts implemented by central clearinghouses to convert centrally cleared derivative contracts from LIBOR to SOFR plus an appropriate spread adjustment were not considered changes requiring assessment for modification accounting. During the transition period, for cash flow hedges that reference 1-Month USD LIBOR, FHN applied expedients related to 1) the assumption of probability of cash flows when reference rates are changed on hedged items 2) avoiding dedesignation when critical terms (i.e., reference rates) change and 3) the allowed assumption of shared risk exposure for hedged items. Additionally, for its cash flow hedges that reference 1-Month Term SOFR, FHN applied expedients related to 1) the allowed assumption of shared risk exposure for hedged items and 2) multiple allowed assumptions of conformity between hedged items and the hedging instrument when assessing effectiveness. FHN continued to utilize these expedients and exceptions through the final cash flows affected by the quotation of LIBOR. In accordance with the provisions of ASU 2020-04, effective immediately after the end of the transition period for its cash flow hedges (i.e., no more cash flows were affected by LIBOR), FHN elected that the cessation of effectiveness assessments under the transition guidance and subsequent initiation of hedge effectiveness assessments under ASC 815 did not require dedesignation of the hedge relationships. In December 2022, the FASB issued ASU 2022-06, "Deferral of the Sunset Date of Topic 848" which extends the transition window for ASU 2020-04 from December 31, 2022 to December 31, 2024, consistent with key USD LIBOR tenors continuing to be published through June 30, 2023. In January 2021, the FASB issued ASU 2021-01, "Scope" to expand the scope of ASU 2020-04 to apply to certain contract modifications that were implemented in October 2020 by derivative clearinghouses for the use of the Secured Overnight Funding Rate (SOFR) in discounting, margining and price alignment for centrally cleared derivatives, including derivatives utilized in hedging relationships. ASU 2021-01 also applies to derivative contracts affected by the change in discounting convention regardless of whether they are centrally cleared (i.e., bi-lateral contracts can also be modified) and regardless of whether they reference LIBOR. ASU 2021-01 was effective immediately upon issuance with retroactive application permitted. FHN elected to retroactively apply the provisions of ASU 2021-01 because FHN's centrally cleared derivatives were affected by the change in discounting convention and because FHN has other bi-lateral derivative contracts that may be modified to conform to the use of SOFR for discounting. Adoption did not have a significant effect on FHN's reported financial condition or results of operations. Summary of Accounting Changes ASU 2022-01 In March 2022, the FASB issued ASU 2022-01, "Fair Value Hedging - Portfolio Layer Method", which will expand FHN's ability to hedge the benchmark interest rate risk of portfolios of financial interests (or beneficial interests) in a fair value hedge. The provisions of ASU 2022-01 also permit FHN to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets, namely by expanding the use of the "portfolio layer" method to non-prepayable financial assets. ASU 2022-01 also permits multiple hedged layers to be designated as a single closed portfolio to achieve hedge accounting. Additionally, the ASU requires that basis adjustments must be maintained on the closed portfolio of assets as a whole, and not allocated to individual assets for active portfolio layer method hedges. ASU 2022-01 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. FHN may utilize the provisions of ASU 2022-01 in its future hedging strategies. ASU 2022-02 In March 2022, the FASB issued ASU 2022-02, “Troubled Debt Restructurings and Vintage Disclosures” that eliminates current TDR recognition and measurement guidance and instead requires the Company to evaluate whether the modification represents a new loan or a continuation of an existing loan (which is consistent with the accounting for other loan modifications). The provisions of ASU 2022-02 also enhance existing disclosure requirements and introduces new disclosures related to certain modifications made to borrowers experiencing financial difficulty. The provisions of this ASU also require FHN to disclose current period gross write-offs of loans and leases by year of origination. ASU 2022-02 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. For the transition method related to the recognition and measurement of TDRs, FHN elected to apply the modified retrospective transition effective January 1, 2023, resulting in a cumulative-effect reduction in ALLL of $6 million and an increase to retained earnings of $4 million, net of tax. The disclosure provisions of ASU 2022-02 are applied prospectively and presented in Note 3 – Loans and Leases and Note 4 – Allowance for Credit Losses. Accounting Changes Issued But Not Currently Effective ASU 2023-02 In March 2023, the FASB issued ASU 2023-02, “Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method” which permits investors to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. The proportional amortization method results in the cost of the investment being amortized in proportion to the income tax credits and other income tax benefits received, with the amortization of the investment and the income tax credits being presented net in the income statement as a component of income tax provision (benefit). Prior to ASU 2023-02, the proportional amortization method was only available to qualifying low income housing equity investments. An investor is required to make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis. An investor that applies the proportional amortization method to qualifying tax equity investments must account for the receipt of the investment tax credits using the flow-through method, even if the entity applies the deferral method for other investment tax credits received. ASU 2023-02 also requires specific disclosures that must be applied to all investments that generate income tax credits and other income tax benefits from a tax credit program for which the entity has elected to apply the proportional amortization method. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for all entities in any interim period. If ASU 2023-02 is adopted in an interim period, it must be adopted as of the beginning of the fiscal year that includes that interim period. Adoption of ASU 2023-02 is applied on either a modified retrospective (cumulative catch up) or a retrospective (representment of prior years) basis. FHN is assessing 1) the applicability of ASU 2023-02 to its tax credit investments and 2) whether to elect the proportional amortization method for qualifying investments.

Investment Securities

Investment Securities	9 Months Ended
Investment Securities	Sep. 30, 2023
Marketable Securities [Abstract]
Investment Securities	Investment Securities The following tables summarize FHN’s investment securities as of September 30, 2023 and December 31, 2022: INVESTMENT SECURITIES AT SEPTEMBER 30, 2023 September 30, 2023 (Dollars in millions) Amortized Gross Gross Fair Securities available for sale: Government agency issued MBS $ 5,156 $ — $ (831) $ 4,325 Government agency issued CMO 2,528 — (428) 2,100 Other U.S. government agencies 1,334 — (206) 1,128 States and municipalities 630 — (83) 547 Total securities available for sale (a) $ 9,648 $ — $ (1,548) $ 8,100 Securities held to maturity: Government agency issued MBS $ 863 $ — $ (143) $ 720 Government agency issued CMO 472 — (88) 384 Total securities held to maturity $ 1,335 $ — $ (231) $ 1,104 (a) Includes $8.4 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. INVESTMENT SECURITIES AT DECEMBER 31, 2022 December 31, 2022 (Dollars in millions) Amortized Gross Gross Fair Securities available for sale: Government agency issued MBS $ 5,457 $ 1 $ (695) $ 4,763 Government agency issued CMO 2,682 — (369) 2,313 Other U.S. government agencies 1,325 — (162) 1,163 States and municipalities 658 1 (62) 597 Total securities available for sale (a) $ 10,122 $ 2 $ (1,288) $ 8,836 Securities held to maturity: Government agency issued MBS $ 897 $ — $ (109) $ 788 Government agency issued CMO 474 — (53) 421 Total securities held to maturity $ 1,371 $ — $ (162) $ 1,209 (a) Includes $6.5 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. The amortized cost and fair value by contractual maturity for the debt securities portfolio as of September 30, 2023 is provided below: DEBT SECURITIES PORTFOLIO MATURITIES Held to Maturity Available for Sale (Dollars in millions) Amortized Fair Amortized Fair Within 1 year $ — $ — $ 14 $ 14 After 1 year through 5 years — — 125 118 After 5 years through 10 years — — 394 341 After 10 years — — 1,431 1,202 Subtotal — — 1,964 1,675 Government agency issued MBS and CMO (a) 1,335 1,104 7,684 6,425 Total $ 1,335 $ 1,104 $ 9,648 $ 8,100 (a) Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. There were no sales of AFS securities for the three and nine months ended September 30, 2023 and 2022. The following tables provide information on investments within the available-for-sale portfolio that had unrealized losses as of September 30, 2023 and December 31, 2022: AFS INVESTMENT SECURITIES WITH UNREALIZED LOSSES As of September 30, 2023 Less than 12 months 12 months or longer Total (Dollars in millions) Fair Unrealized Fair Unrealized Fair Unrealized Government agency issued MBS $ 258 $ (14) $ 4,066 $ (817) $ 4,324 $ (831) Government agency issued CMO 53 (4) 2,047 (424) 2,100 (428) Other U.S. government agencies 256 (12) 871 (194) 1,127 (206) States and municipalities 97 (6) 439 (77) 536 (83) Total $ 664 $ (36) $ 7,423 $ (1,512) $ 8,087 $ (1,548) As of December 31, 2022 Less than 12 months 12 months or longer Total (Dollars in millions) Fair Unrealized Fair Unrealized Fair Unrealized Government agency issued MBS $ 2,314 $ (249) $ 2,350 $ (446) $ 4,664 $ (695) Government agency issued CMO 1,104 (123) 1,209 (246) 2,313 (369) Other U.S. government agencies 643 (67) 424 (95) 1,067 (162) States and municipalities 493 (48) 54 (14) 547 (62) Total $ 4,554 $ (487) $ 4,037 $ (801) $ 8,591 $ (1,288) FHN has evaluated all AFS debt securities that were in unrealized loss positions in accordance with its accounting policy for recognition of credit losses. No AFS debt securities were determined to have credit losses. Total AIR not included in the fair value or amortized cost basis of AFS debt securities was $29 million and $32 million as of September 30, 2023 and December 31, 2022, respectively. Consistent with FHN's review of the related securities, there were no credit-related write downs of AIR for AFS debt securities during the reporting periods. Additionally, for AFS debt securities with unrealized losses, FHN does not intend to sell them, and it is more likely than not that FHN will not be required to sell them prior to recovery. Therefore, no write downs of these investments to fair value occurred during the reporting periods. There were no transfers to or from AFS or HTM during the three and nine month periods ended September 30, 2023. For HTM securities, an allowance for credit losses is required to absorb estimated lifetime credit losses. Total AIR not included in the fair value or amortized cost basis of HTM debt securities was $3 million as of both September 30, 2023 and December 31, 2022. FHN has assessed the risk of credit loss and has determined that no allowance for credit losses for HTM securities was necessary as of September 30, 2023 and December 31, 2022. The evaluation of credit risk includes consideration of third-party and government guarantees (both explicit and implicit), senior or subordinated status, credit ratings of the issuer, the effects of interest rate changes since purchase and observable market information such as issuer-specific credit spreads. The carrying amount of equity investments without a readily determinable fair value was $87 million and $79 million at September 30, 2023 and December 31, 2022, respectively. The year-to-date 2023 and 2022 gross amounts of upward and downward valuation adjustments were not significant. Unrealized gains of less than $1 million and $7 million were recognized in the three and nine months ended September 30, 2023, respectively, for equity investments with readily determinable fair values. Unrealized losses of $2 million and $15 million were recognized in the three and nine months ended September 30, 2022, respectively, for equity investments with readily determinable fair values.

Loans and Leases

Loans and Leases	9 Months Ended
Loans and Leases	Sep. 30, 2023
Receivables [Abstract]
Loans and Leases	Loans and Leases The loans and leases portfolio is disaggregated into portfolio segments and then further disaggregated into classes for certain disclosures. GAAP defines a portfolio segment as the level at which an entity develops and documents a systematic method for determining its allowance for credit losses. A class is generally a disaggregation of a portfolio segment and is generally determined based on risk characteristics of the loan and FHN’s method for monitoring and assessing credit risk and performance. FHN's loan and lease portfolio segments are commercial and consumer. The classes of loans and leases are: (1) commercial, financial, and industrial, which includes commercial and industrial loans and leases and loans to mortgage companies, (2) commercial real estate, (3) consumer real estate, which includes both real estate installment and home equity lines of credit, and (4) credit card and other. The following table provides the amortized cost basis of loans and leases by portfolio segment and class as of September 30, 2023 and December 31, 2022, excluding accrued interest of $276 million and $226 million, respectively, which is included in other assets in the Consolidated Balance Sheets. LOANS AND LEASES BY PORTFOLIO SEGMENT (Dollars in millions) September 30, 2023 December 31, 2022 Commercial: Commercial and industrial (a) (b) $ 30,926 $ 29,523 Loans to mortgage companies 2,237 2,258 Total commercial, financial, and industrial 33,163 31,781 Commercial real estate 14,121 13,228 Consumer: HELOC 2,248 2,028 Real estate installment loans 11,437 10,225 Total consumer real estate 13,685 12,253 Credit card and other (c) 809 840 Loans and leases $ 61,778 $ 58,102 Allowance for loan and lease losses (760) (685) Net loans and leases $ 61,018 $ 57,417 (a) Includes equipment financing leases of $1.2 billion and $1.1 billion for September 30, 2023 and December 31, 2022, respectively. (b) Includes PPP loans fully guaranteed by the SBA of $35 million and $76 million as of September 30, 2023 and December 31, 2022, respectively. (c) Includes $187 million and $193 million of commercial credit card balances as of September 30, 2023 and December 31, 2022, respectively. Restrictions Loans and leases with carrying values of $47.8 billion and $38.3 billion were pledged as collateral for borrowings at September 30, 2023 and December 31, 2022, respectively. Concentrations of Credit Risk Most of FHN’s business activity is with clients located in the southern United States. FHN’s lending activity is concentrated in its market areas within those states. As of September 30, 2023, FHN had loans to mortgage companies of $2.2 billion and loans to finance and insurance companies of $4.2 billion. As a result, 20% of the C&I portfolio is sensitive to impacts on the financial services industry. Credit Quality Indicators FHN employs a dual grade commercial risk grading methodology to assign an estimate for the probability of default and the loss given default for each commercial loan using factors specific to various industry, portfolio, or product segments that result in a rank ordering of risk and the assignment of grades PD 1 to PD 16. This credit grading system is intended to identify and measure the credit quality of the loan and lease portfolio by analyzing the migration between grading categories. It is also integral to the estimation methodology utilized in determining the ALLL since an allowance is established for pools of commercial loans based on the credit grade assigned. Each PD grade corresponds to an estimated one-year default probability percentage. PD grades are continually evaluated but require a formal scorecard annually. PD 1 through PD 12 are “pass” grades. PD grades 13-16 correspond to the regulatory-defined categories of special mention (13), substandard (14), doubtful (15), and loss (16). Special mention loans and leases have potential weaknesses that, if left uncorrected, may result in deterioration of FHN's credit position at some future date. Substandard commercial loans and leases have well-defined weaknesses and are characterized by the distinct possibility that FHN will sustain some loss if the deficiencies are not corrected. Doubtful commercial loans and leases have the same weaknesses as substandard loans and leases with the added characteristics that the probability of loss is high, and collection of the full amount is improbable. The following tables provide the amortized cost basis of the commercial loan portfolio by year of origination and credit quality indicator as of September 30, 2023 and December 31, 2022: C&I PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (b) $ 3,351 $ 5,945 $ 3,796 $ 1,710 $ 1,772 $ 3,634 $ 2,237 $ 9,302 $ 358 $ 32,105 Special Mention (PD grade 13) 1 31 54 53 100 60 — 139 1 439 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) — 123 62 49 39 96 — 147 103 619 Total C&I loans $ 3,352 $ 6,099 $ 3,912 $ 1,812 $ 1,911 $ 3,790 $ 2,237 $ 9,588 $ 462 $ 33,163 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (b) $ 7,456 $ 3,634 $ 1,803 $ 1,912 $ 1,112 $ 3,170 $ 2,258 $ 9,166 $ 371 $ 30,882 Special Mention (PD grade 13) 17 56 17 125 8 80 — 126 — 429 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 36 48 41 34 25 55 — 134 97 470 Total C&I loans $ 7,509 $ 3,738 $ 1,861 $ 2,071 $ 1,145 $ 3,305 $ 2,258 $ 9,426 $ 468 $ 31,781 (a) LMC includes non-revolving commercial lines of credit to qualified mortgage companies primarily for the temporary warehousing of eligible mortgage loans prior to the borrower's sale of those mortgage loans to third-party investors. The loans are of short duration with maturities less than one year. (b) Balances include PPP loans. CRE PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Loans Converted to Term Loans Total Credit Quality Indicator: Pass (PD grades 1 through 12) $ 663 $ 3,355 $ 3,643 $ 1,306 $ 1,331 $ 2,978 $ 316 $ 19 $ 13,611 Special Mention (PD grade 13) 1 1 3 30 147 77 — — 259 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) — 2 5 11 141 84 8 — 251 Total CRE loans $ 664 $ 3,358 $ 3,651 $ 1,347 $ 1,619 $ 3,139 $ 324 $ 19 $ 14,121 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total Credit Quality Indicator: Pass (PD grades 1 through 12) $ 2,637 $ 3,324 $ 1,488 $ 1,855 $ 808 $ 2,565 $ 274 $ 20 $ 12,971 Special Mention (PD grade 13) — 3 3 37 68 5 1 — 117 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 1 4 12 50 31 31 11 — 140 Total CRE loans $ 2,638 $ 3,331 $ 1,503 $ 1,942 $ 907 $ 2,601 $ 286 $ 20 $ 13,228 The consumer portfolio is comprised primarily of smaller-balance loans which are very similar in nature in that most are standard products and are backed by residential real estate. Because of the similarities of consumer loan types, FHN is able to utilize the FICO score, among other attributes, to assess the credit quality of consumer borrowers. FICO scores are refreshed on a quarterly basis in an attempt to reflect the recent risk profile of the borrowers. Accruing delinquency amounts are indicators of asset quality within the credit card and other consumer portfolio. The following table reflects the amortized cost basis by year of origination and refreshed FICO scores for consumer real estate loans as of September 30, 2023 and December 31, 2022. Within consumer real estate, classes include HELOC and real estate installment loans. HELOCs are loans which during their draw period are classified as revolving loans. Once the draw period ends and the loan enters its repayment period, the loan converts to a term loan and is classified as a revolving loan converted to a term loan. All loans classified in the following tables as revolving loans or revolving loans converted to term loans are HELOCs. Real estate installment loans are originated as fixed term loans and are classified below in their vintage year. All loans in the following tables classified in a vintage year are real estate installment loans. CONSUMER REAL ESTATE PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Total FICO score 740 or greater $ 1,425 $ 2,110 $ 1,750 $ 748 $ 475 $ 1,398 $ 1,542 $ 53 $ 9,501 FICO score 720-739 180 287 230 110 90 239 189 16 1,341 FICO score 700-719 132 234 195 87 52 230 157 18 1,105 FICO score 660-699 162 200 119 83 53 303 175 19 1,114 FICO score 620-659 9 20 23 24 37 112 37 7 269 FICO score less than 620 12 17 19 20 12 240 23 12 355 Total $ 1,920 $ 2,868 $ 2,336 $ 1,072 $ 719 $ 2,522 $ 2,123 $ 125 $ 13,685 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total FICO score 740 or greater $ 2,154 $ 1,847 $ 819 $ 523 $ 278 $ 1,294 $ 1,297 $ 63 $ 8,275 FICO score 720-739 292 246 116 98 34 238 183 18 1,225 FICO score 700-719 242 206 93 55 35 226 142 22 1,021 FICO score 660-699 214 137 90 55 62 278 192 23 1,051 FICO score 620-659 21 24 25 41 20 105 47 9 292 FICO score less than 620 15 19 32 12 23 256 16 16 389 Total $ 2,938 $ 2,479 $ 1,175 $ 784 $ 452 $ 2,397 $ 1,877 $ 151 $ 12,253 The following tables reflect the amortized cost basis by year of origination and refreshed FICO scores for credit card and other loans as of September 30, 2023 and December 31, 2022. CREDIT CARD & OTHER PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Total FICO score 740 or greater $ 43 $ 29 $ 13 $ 6 $ 4 $ 34 $ 223 $ 5 $ 357 FICO score 720-739 5 3 2 1 1 5 27 1 45 FICO score 700-719 4 3 4 1 1 5 23 3 44 FICO score 660-699 2 3 1 1 1 8 19 1 36 FICO score 620-659 1 1 1 — — 3 6 — 12 FICO score less than 620 9 9 6 8 13 107 162 1 315 Total $ 64 $ 48 $ 27 $ 17 $ 20 $ 162 $ 460 $ 11 $ 809 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total FICO score 740 or greater $ 36 $ 14 $ 10 $ 10 $ 4 $ 25 $ 291 $ 6 $ 396 FICO score 720-739 3 2 2 1 — 4 30 1 43 FICO score 700-719 3 3 1 1 — 4 33 1 46 FICO score 660-699 3 2 1 1 2 7 30 1 47 FICO score 620-659 1 3 1 — — 3 18 — 26 FICO score less than 620 7 6 6 10 7 71 174 1 282 Total $ 53 $ 30 $ 21 $ 23 $ 13 $ 114 $ 576 $ 10 $ 840 Nonaccrual and Past Due Loans and Leases Loans and leases are placed on nonaccrual if it becomes evident that full collection of principal and interest is at risk, impairment has been recognized as a partial charge-off of principal balance due to insufficient collateral value and past due status, or on a case-by-case basis if FHN continues to receive payments but there are other borrower-specific issues. Included in nonaccrual are loans for which FHN continues to receive payments including residential real estate loans where the borrower has been discharged of personal obligation through bankruptcy. Past due loans are loans contractually past due as to interest or principal payments, but which have not yet been put on nonaccrual status. The following table reflects accruing and non-accruing loans and leases by class on September 30, 2023 and December 31, 2022: ACCRUING & NON-ACCRUING LOANS AND LEASES September 30, 2023 Accruing Non-Accruing (Dollars in millions) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 30,772 $ 28 $ 3 $ 30,803 $ 78 $ 2 $ 43 $ 123 $ 30,926 Loans to mortgage companies 2,237 — — 2,237 — — — — 2,237 Total commercial, financial, and industrial 33,009 28 3 33,040 78 2 43 123 33,163 Commercial real estate: CRE (b) 13,992 4 — 13,996 43 50 32 125 14,121 Consumer real estate: HELOC (c) 2,185 13 5 2,203 32 4 9 45 2,248 Real estate installment loans (d) 11,307 25 6 11,338 47 8 44 99 11,437 Total consumer real estate 13,492 38 11 13,541 79 12 53 144 13,685 Credit card and other: Credit card 274 4 3 281 — — — — 281 Other 525 1 — 526 2 — — 2 528 Total credit card and other 799 5 3 807 2 — — 2 809 Total loans and leases $ 61,292 $ 75 $ 17 $ 61,384 $ 202 $ 64 $ 128 $ 394 $ 61,778 December 31, 2022 Accruing Non-Accruing (Dollars in millions) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 29,309 $ 50 $ 11 $ 29,370 $ 64 $ 10 $ 79 $ 153 $ 29,523 Loans to mortgage companies 2,258 — — 2,258 — — — — 2,258 Total commercial, financial, and industrial 31,567 50 11 31,628 64 10 79 153 31,781 Commercial real estate: CRE (b) 13,208 11 — 13,219 7 — 2 9 13,228 Consumer real estate: HELOC (c) 1,967 12 5 1,984 32 4 8 44 2,028 Real estate installment loans (d) 10,079 25 13 10,117 56 5 47 108 10,225 Total consumer real estate 12,046 37 18 12,101 88 9 55 152 12,253 Credit card and other: Credit card 287 5 4 296 — — — — 296 Other 540 2 — 542 1 — 1 2 544 Total credit card and other 827 7 4 838 1 — 1 2 840 Total loans and leases $ 57,648 $ 105 $ 33 $ 57,786 $ 160 $ 19 $ 137 $ 316 $ 58,102 (a) $108 million and $147 million of C&I loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively. (b) $117 million and $5 million of CRE loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively. (c) $5 million of HELOC loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in both 2023 and 2022. (d) $10 million and $7 million of real estate installment loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively. Collateral-Dependent Loans Collateral-dependent loans are defined as loans for which repayment is expected to be derived substantially through the operation or sale of the collateral and where the borrower is experiencing financial difficulty. At a minimum, the estimated value of the collateral for each loan equals the current book value. As of September 30, 2023 and December 31, 2022, FHN had commercial loans with amortized cost of approximately $245 million and $124 million, respectively, that were based on the value of underlying collateral. Collateral-dependent C&I and CRE loans totaled $120 million and $125 million, respectively, at September 30, 2023. The collateral for these loans generally consists of business assets including land, buildings, equipment, and financial assets. During the three and nine months ended September 30, 2023, FHN recognized charge-offs of $82 million and of $106 million, respectively, on these loans related to reductions in estimated collateral values. Consumer HELOC and real estate installment loa ns with amortized cost based on the va lue of underlying real estate collateral were approximately $6 million and $28 million, respectively, as of September 30, 2023 and $7 million and $26 million, respectively, as of December 31, 2022. Charge-offs relating to collateral-dependent consumer loans for the nine months ending September 30, 2023 and September 30, 2022 were $1 million and $2 million, respectively. Loan Modifications to Troubled Borrowers As part of FHN’s ongoing risk management practices, FHN attempts to work with borrowers when necessary to extend or modify loan terms to better align with their current ability to repay. Modifications could include extension of the maturity date, reductions of the interest rate, reduction or forgiveness of accrued interest, or principal forgiveness. Combinations of these modifications may also be made for individual loans. Extensions and modifications to loans are made in accordance with internal policies and guidelines which conform to regulatory guidance. Principal reductions may be made in limited circumstances, typically for specific commercial loan workouts, and in the event of borrower bankruptcy. Each occurrence is unique to the borrower and is evaluated separately. Troubled loans are considered those in which the borrower is experiencing financial difficulty. The assessment of whether a borrower is experiencing financial difficulty can be subjective in nature and management’s judgment may be required in making this determination. FHN may determine that a borrower is experiencing financial difficulty if the borrower is currently in default on any of its debt, or if it is probable that a borrower may default in the foreseeable future absent a modification. Many aspects of a borrower’s financial situation are assessed when determining whether they are experiencing financial difficulty. Troubled commercial loans are typically modified through forbearance agreements which could include reduced interest rates, reduced payments, term extension, or entering into short sale agreements. Principal reductions may occur in specific circumstances. Modifications for troubled consumer loans are generally structured using parameters of U.S. government-sponsored programs. For HELOC and real estate installment loans, troubled loans are typically modified by an interest rate reduction and a possible maturity date extension to reach an affordable housing debt-to-income ratio. Despite the absence of a loan modification by FHN, the discharge of personal liability through bankruptcy proceedings is considered a court-imposed modification. For the credit card portfolio, troubled loan modifications are typically enacted through either a short-term credit card hardship program or a longer-term credit card workout program. In the credit card hardship program, borrowers may be granted rate and payment reductions for six months to one year. In the credit card workout program, borrowers are granted a rate reduction to 0% and a term extension for up to five years. Modifications to Borrowers Experiencing Financial Difficulty For periods subsequent to December 31, 2022, information regarding loans modified when a borrower is experiencing financial difficulty are included in the tables below. The following tables present the amortized cost basis at the end of the reporting period of loans modified to borrowers experiencing financial difficulty, disaggregated by class of financing receivable and type of modification made, as well as the financial effect of the modifications made as of September 30, 2023: LOAN MODIFICATIONS TO BORROWERS EXPERIENCING FINANCIAL DIFFICULTY September 30, 2023 Interest Rate Reduction (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 1 — Reduced weighted-average contractual interest rate from 8.60% to 5.00% Credit Card and Other (a) — — Reduced weighted-average contractual interest rate from 13.30% to 0.00% Total $ 1 — % (a) Balance less than $1 million. September 30, 2023 Term Extension (Dollars in millions) Balance % of Total Class Financial Effect C&I $ 81 0.2 % Added an estimated weighted-average 1 year to the life of loans, which reduced monthly payment amounts for the borrowers CRE 42 0.3 Added an estimated weighted-average 1 year to the life of loans, which reduced monthly payment amounts for the borrowers Consumer Real Estate 2 — Added a weighted-average 10 years to the life of loans, which reduced monthly payment amounts for the borrowers Credit Card and Other — — N/A Total $ 125 0.2 % September 30, 2023 Principal Forgiveness (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 1 — $1.3 million of the principal of consumer loans was legally discharged in bankruptcy during the period and the borrowers have not re-affirmed the debt as of period end. Credit Card and Other — — N/A Total $ 1 — % September 30, 2023 Payment Deferrals (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 3 — Payment deferral for 11 months, with a balloon payment at the end of the term Credit Card and Other — — N/A Total $ 3 — % September 30, 2023 Combination - Term Extension and Interest Rate Reduction (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 5 — Added a weighted-average 13.5 years to the life of loans and reduced weighted-average contractual interest rate from 5.60% to 4.80% Credit Card and Other — — N/A Total $ 5 — % September 30, 2023 Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness (Dollars in millions) Balance % of Total Class Financial Effect C&I $ 2 — % Added a weighted-average 3.7 years to the life of loans, reduced weighted-average contractual interest rate from 11.25% to 7.50% and provided less than $1 million in interest forgiveness CRE — — N/A Consumer Real Estate — — N/A Credit Card and Other — — N/A Total $ 2 — % September 30, 2023 Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE 16 0.1 Added a weighted-average 1 year to the life of loans, reduced weighted-average contractual interest rate from 8.65% to 8.00% and provided less than $1 million in deferred interest Consumer Real Estate — — N/A Credit Card and Other — — N/A Total $ 16 — % Loan modifications to borrowers experiencing financial difficulty that had a payment default during the period totaled $21 million as of September 30, 2023. FHN closely monitors the performance of the loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table depicts the performance of loans that have been modified in the last 12 months : PERFORMANCE OF LOANS THAT HAVE BEEN MODIFIED IN THE LAST 12 MONTHS September 30, 2023 (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Non-Accruing C&I $ 77 $ — $ — $ 6 CRE 8 — — 50 Consumer Real Estate 2 — — 10 Credit Card and Other — — — — Total $ 87 $ — $ — $ 66 Troubled Debt Restructurings Prior to January 1, 2023, a modification was classified as a TDR if the borrower was experiencing financial difficulty and it was determined that FHN granted a concession to the borrower. Concessions represented modifications that FHN would not otherwise consider if a borrower had not been experiencing financial difficulty. Evaluation of whether a concession was granted, was subjective in nature and management’s judgment was required in making the determination of whether a modification was classified as a TDR. All non-reaffirmed residential real estate loans discharged in Chapter 7 bankruptcy were considered concessions and classified as non-accruing TDRs. On December 31, 2022, FHN had $180 million of portfolio loans classified as TDRs. Additionally, $30 million of loans held for sale as of December 31, 2022 were classified as TDRs. The following table presents the end of period balance for loans modified in a TDR during the year ended December 31, 2022: LOANS MODIFIED IN A TDR Year Ended December 31, 2022 (Dollars in millions) Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment C&I 6 $ 30 $ 24 CRE 1 1 1 HELOC 98 7 7 Real estate installment loans 181 41 41 Credit card and other 81 12 12 Total TDRs 367 $ 91 $ 85 The following table presents TDRs which re-defaulted during 2022 and as to which the modification occurred 12 months or less prior to the re-default. For purposes of this disclosure, FHN generally defines payment default as 30 or more days past due. LOANS MODIFIED IN A TDR THAT RE-DEFAULTED Year Ended December 31, 2022 (Dollars in millions) Number Recorded C&I 5 $ — CRE — — HELOC 22 1 Real estate installment loans 54 15 Credit card and other 17 — Total TDRs 98 $ 16

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
Allowance for Credit Losses	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses Management's estimate of expected credit losses in the loan and lease portfolios is recorded in the ALLL and the reserve for unfunded lending commitments, collectively referred to as the Allowance for Credit Losses, or the ACL. The ALLL and the reserve for unfunded lending commitments are reported on the Consolidated Balance Sheets in the allowance for loan and lease losses and in other liabilities, respectively. Provisions for credit losses related to loans and leases and unfunded lending commitments are reported in the Consolidated Statements of Income as provision for credit losses. The ACL is maintained at a level management believes to be appropriate to absorb expected lifetime credit losses over the contractual life of the loan and lease portfolio and unfunded lending commitments. The determination of the ACL is based on periodic evaluation of the loan and lease portfolios and unfunded lending commitments considering a number of relevant underlying factors, including key assumptions and evaluation of quantitative and qualitative information. The expected loan losses are the product of multiplying FHN’s estimates of probability of default (PD), loss given default (LGD), and individual loan level exposure at default (EAD), including amortization and prepayment assumptions, on an undiscounted basis. FHN uses models or assumptions to develop the expected loss forecasts, which incorporate multiple macroeconomic forecasts over a four-year reasonable and supportable forecast period. After the reasonable and supportable forecast period, the Company immediately reverts to its historical loss averages, evaluated over the historical observation period, for the remaining estimated life of the loans. In order to capture the unique risks of the loan portfolio within the PD, LGD, and prepayment models, FHN segments the portfolio into pools, generally incorporating loan grades for commercial loans. As there can be no certainty that actual economic performance will precisely follow any specific macroeconomic forecast, FHN uses qualitative adjustments where current loan characteristics or current or forecasted economic conditions differ from historical periods. The evaluation of quantitative and qualitative information is performed through assessments of groups of assets that share similar risk characteristics and certain individual loans and leases that do not share similar risk characteristics with the collective group. As described in Note 3 - Loans and Leases, loans are grouped generally by product type and significant loan portfolios are assessed for credit losses using analytical or statistical models. The quantitative component utilizes economic forecast information as its foundation and is primarily based on analytical models that use known or estimated data as of the balance sheet date and forecasted data over the reasonable and supportable period. The ACL is also affected by qualitative factors that FHN considers to reflect current judgment of various events and risks that are not measured in the quantitative calculations, including alternative economic forecasts. In accordance with its accounting policy elections, FHN does not recognize a separate allowance for expected credit losses for AIR and records reversals of AIR as reductions of interest income. FHN reverses previously accrued but uncollected interest when an asset is placed on nonaccrual status. AIR and the related allowance for expected credit losses is included as a component of other assets. The total amount of interest reversals from loans placed on nonaccrual status and the amount of income recognized on nonaccrual loans during the three and nine months ended September 30, 2023 and 2022 were not material. Expected credit losses for unfunded commitments are estimated for periods where the commitment is not unconditionally cancellable. The measurement of expected credit losses for unfunded commitments mirrors that of loans and leases with the additional estimate of future draw rates (timing and amount). Prior to January 1, 2023, TDRs were reflected in FHN’s estimate of expected credit losses as described in Note 1 - Significant Accounting Policies, in its 2022 Form 10-K. Subsequent to December 31, 2022, in accordance with the provisions of ASU 2022-02, FHN has ceased recognition of TDRs and no longer performs discounted cash flow calculations for these loans to estimate expected credit losses. As described in Note 3 – Loans and Leases, FHN now monitors and discloses information associated with modifications to borrowers experiencing financial difficulty. For both commercial and consumer portfolio segments, an adjustment to the ACL is generally not recorded at the time of modification because FHN includes these modified loans in its quantitative loss estimation processes. In the event of principal forgiveness, which primarily occurs for commercial loan workouts and consumer loans experiencing bankruptcy, FHN records the reduction in expected collectible principal balance as a charge-off against the ALLL. The increase in the ACL balance as of September 30, 2023 as compared to December 31, 2022 largely reflects loan growth during the period and an evolving macroeconomic outlook resulting from inflation, the interest rate environment, and other factors. In developing credit loss estimates for its loan and lease portfolios, FHN utilized two Moody’s forecast scenarios for its macroeconomic inputs. As of September 30, 2023, FHN's scenario selection process focused on key economic drivers such as inflation, interest rates, supply chain disruptions, labor/wage constraints, and international conflict. FHN selected one scenario as its base case, which was the Moody's baseline scenario. The heaviest weight was placed on this scenario. A smaller weight was placed on the FHN-selected downside scenario. Management also made qualitative adjustments to reflect estimated recoveries based on a review of prior charge-off and recovery levels, for default risk associated with large balances with individual borrowers, for estimated loss amounts not reflected in historical factors due to specific portfolio risk, and for instances where limited data for acquired loans is considered to affect modeled results. The following table provides a rollforward of the ALLL and the reserve for unfunded lending commitments by portfolio type for the three and nine months ended September 30, 2023 and 2022: ROLLFORWARD OF ALLL & RESERVE FOR UNFUNDED LENDING COMMITMENTS (Dollars in millions) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Three Months Ended September 30, 2023 Allowance for loan and lease losses: Balance as of July 1, 2023 $ 326 $ 159 $ 221 $ 31 $ 737 Charge-offs (b) (91) (5) (1) (7) (104) Recoveries 5 1 2 1 9 Provision for loan and lease losses 95 14 6 3 118 Balance as of September 30, 2023 $ 335 $ 169 $ 228 $ 28 $ 760 Reserve for remaining unfunded commitments: Balance as of July 1, 2023 $ 55 $ 24 $ 11 $ — $ 90 Provision for remaining unfunded commitments (6) (3) 1 — (8) Balance as of September 30, 2023 49 21 12 — 82 Allowance for credit losses as of September 30, 2023 $ 384 $ 190 $ 240 $ 28 $ 842 Three Months Ended September 30, 2022 Allowance for loan and lease losses: Balance as of July 1, 2022 $ 274 $ 141 $ 183 $ 26 $ 624 Charge-offs (13) (1) (1) (6) (21) Recoveries 2 — 6 1 9 Provision for loan and lease losses 32 8 5 7 52 Balance as of September 30, 2022 $ 295 $ 148 $ 193 $ 28 $ 664 Reserve for remaining unfunded commitments: Balance as of July 1, 2022 $ 53 $ 17 $ 10 $ — $ 80 Provision for remaining unfunded commitments 5 2 1 — 8 Balance as of September 30, 2022 58 19 11 — 88 Allowance for credit losses as of September 30, 2022 $ 353 $ 167 $ 204 $ 28 $ 752 (Dollars in millions) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Nine Months Ended September 30, 2023 Allowance for loan and lease losses: Balance as of January 1, 2023 $ 308 $ 146 $ 200 $ 31 $ 685 Adoption of ASU 2022-02 1 — (7) — (6) Charge-offs (b) (124) (15) (3) (17) (159) Recoveries 12 2 7 4 25 Provision for loan and lease losses 138 36 31 10 215 Balance as of September 30, 2023 $ 335 $ 169 $ 228 $ 28 $ 760 Reserve for remaining unfunded commitments: Balance as of January 1, 2023 $ 55 $ 22 $ 10 $ — $ 87 Provision for remaining unfunded commitments (6) (1) 2 — (5) Balance as of September 30, 2023 49 21 12 — 82 Allowance for credit losses as of September 30, 2023 $ 384 $ 190 $ 240 $ 28 $ 842 Nine Months Ended September 30, 2022 Allowance for loan and lease losses: Balance as of January 1, 2022 $ 334 $ 154 $ 163 $ 19 $ 670 Charge-offs (38) (1) (4) (18) (61) Recoveries 6 1 17 3 27 Provision for loan and lease losses (7) (6) 17 24 28 Balance as of September 30, 2022 $ 295 $ 148 $ 193 $ 28 $ 664 Reserve for remaining unfunded commitments: Balance as of January 1, 2022 $ 46 $ 12 $ 8 $ — $ 66 Provision for remaining unfunded commitments 12 7 3 — 22 Balance as of September 30, 2022 58 19 11 — 88 Allowance for credit losses as of September 30, 2022 $ 353 $ 167 $ 204 $ 28 $ 752 (a) C&I loans as of September 30, 2023 and 2022 include $35 million and $129 million in PPP loans, respectively, which due to the government guarantee and forgiveness provisions are considered to have no credit risk and therefore have no allowance for loan and lease losses. (b) Charge-offs in the C&I portfolio in 2023 include $72 million from a single credit from a company in bankruptcy. The following table represents gross charge-offs by year of origination for the nine months ended September 30, 2023: GROSS CHARGE-OFFS (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Loans Total C&I (a) $ 74 $ 13 $ 6 $ 4 $ 9 $ 13 $ 5 $ 124 CRE — — — — 2 13 — 15 Consumer Real Estate — — — 1 — 2 — 3 Credit Card and Other 9 — 1 — — 2 5 17 Total $ 83 $ 13 $ 7 $ 5 $ 11 $ 30 $ 10 $ 159

Mortgage Banking Activity

Mortgage Banking Activity	9 Months Ended
Mortgage Banking Activity	Sep. 30, 2023
Mortgage Banking [Abstract]
Mortgage Banking Activity	Mortgage Banking Activity FHN originates mortgage loans for sale into the secondary market. These loans primarily consist of residential first lien mortgages that conform to standards established by GSEs that are major investors in U.S. home mortgages, but can also consist of junior lien and jumbo loans secured by residential property. These loans are primarily sold to private companies that are unaffiliated with the GSEs on a servicing-released basis. Gains and losses on these mortgage loans are included in mortgage banking and title income on the Consolidated Statements of Income. At September 30, 2023, FHN had approximately $35 million of loans that remained from pre-2009 mortgage business operations of legacy First Horizon. Activity related to the pre-2009 mortgage loans was primarily limited to payments and write-offs in 2023 and 2022, with no new originations or loan sales, and only an insignificant amount of repurchases. These loans are excluded from the disclosure below. The following table summarizes activity relating to residential mortgage loans held for sale as of and for the nine months ended September 30, 2023 and the year ended December 31, 2022. MORTGAGE LOAN ACTIVITY (Dollars in millions) September 30, 2023 December 31, 2022 Balance at beginning of period $ 44 $ 250 Originations and purchases 512 1,275 Sales, net of gains (475) (1,481) Balance at end of period $ 81 $ 44 Mortgage Servicing Rights FHN records mortgage servicing rights at the lower of cost or market value and amortizes them over the remaining servicing life of the loans, with consideration given to prepayment assumptions. Mortgage servicing rights are included in other assets on the Consolidated Balance Sheets. Mortgage servicing rights had the following carrying values as of the periods indicated. MORTGAGE SERVICING RIGHTS September 30, 2023 December 31, 2022 (Dollars in millions) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Mortgage servicing rights $ 24 $ (6) $ 18 $ 21 $ (5) $ 16 In addition, there was an insignificant amount of non-mortgage and commercial servicing rights as of September 30, 2023 and December 31, 2022. Total mortgage servicing fees included in mortgage banking and title income were $3 million and $4 million for the nine months ended September 30, 2023 and 2022, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
Goodwill and Other Intangible Assets	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill The following is a summary of goodwill by reportable segment included in the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022. GOODWILL (Dollars in millions) Regional Specialty Banking Total December 31, 2021 $ 880 $ 631 $ 1,511 Additions — — — December 31, 2022 $ 880 $ 631 $ 1,511 Additions — — — September 30, 2023 $ 880 $ 631 $ 1,511 FHN performed the required annual goodwill impairment test as of October 1, 2022. The annual impairment test did not indicate impairment in any of FHN’s reporting units as of the testing date. Following the testing date, management evaluated the events and circumstances that could indicate that goodwill might be impaired and concluded that it is not more likely than not that goodwill was impaired. If there are any triggering events between annual periods, management will evaluate whether an impairment analysis is warranted. FHN will conduct its annual impairment analysis as of October 1, 2023. Accounting estimates and assumptions were made about FHN's future performance and cash flows, as well as other prevailing market factors (e.g., interest rates, economic trends, etc.) when determining fair value as part of the goodwill impairment test. While management used the best information available to estimate future performance for each reporting unit, future adjustments to management's projections may be necessary if conditions differ substantially from the assumptions used in making the estimates. Other intangible assets The following table, which excludes fully amortized intangibles, presents other intangible assets included in the Consolidated Balance Sheets: OTHER INTANGIBLE ASSETS September 30, 2023 December 31, 2022 (Dollars in millions) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposit intangibles $ 368 $ (199) $ 169 $ 371 $ (171) $ 200 Client relationships 32 (15) 17 32 (13) 19 Other (a) 27 (15) 12 27 (12) 15 Total $ 427 $ (229) $ 198 $ 430 $ (196) $ 234 (a) Includes non-compete covenants and purchased credit card intangible assets. Also includes state banking licenses which are not subject to amortization.

Preferred Stock

Preferred Stock	9 Months Ended
Preferred Stock	Sep. 30, 2023
Equity [Abstract]
Preferred Stock	Preferred Stock The following table presents a summary of FHN's non-cumulative perpetual preferred stock: PREFERRED STOCK (Dollars in millions) September 30, 2023 December 31, 2022 Issuance Date Earliest Redemption Date (a) Annual Dividend Rate Dividend Payments Shares Outstanding Liquidation Amount Carrying Amount Carrying Amount Series B 7/2/2020 8/1/2025 6.625% (b) Semi-annually 8,000 $ 80 $ 77 $ 77 Series C 7/2/2020 5/1/2026 6.600% (c) Quarterly 5,750 58 59 59 Series D 7/2/2020 5/1/2024 6.100% (d) Semi-annually 10,000 100 94 94 Series E 5/28/2020 10/10/2025 6.500% Quarterly 1,500 150 145 145 Series F 5/3/2021 7/10/2026 4.700% Quarterly 1,500 150 145 145 Series G 2/28/2022 2/28/2027 N/A N/A — — — 494 26,750 $ 538 $ 520 $ 1,014 N/A - not applicable (a) Denotes earliest optional redemption date. Earlier redemption is possible, at FHN's election, if certain regulatory capital events occur. (b) Fixed dividend rate will reset on August 1, 2025 to three-month CME Term SOFR plus 4.52361% (0.26161% plus 4.262%). (c) Fixed dividend rate will reset on May 1, 2026 to three-month CME Term SOFR plus 5.18161% (0.26161% plus 4.920%). (d) Fixed dividend rate will reset on May 1, 2024 to three-month CME Term SOFR plus 4.12061% (0.26161% plus 3.859%). On February 28, 2022, in connection with the execution of the TD Merger Agreement, FHN issued $494 million of Series G Perpetual Convertible Preferred Stock (the Series G Convertible Preferred Stock). The Series G Convertible Preferred Stock was convertible into up to 4.9% of the outstanding shares of FHN common stock in certain circumstances, including termination of the TD Merger Agreement. Because regulatory approval of the TD Transaction was not obtained, conversion occurred, effective June 26, 2023, at a fixed rate of 4,000 shares of common stock for each share of Series G Convertible Preferred Stock, resulting in 19,742,776 additional common shares outstanding. The $494 million carrying value of the Series G Convertible Preferred Stock qualified as Tier 1 Capital as of December 31, 2022 and qualified for Common Equity Tier 1 Capital upon conversion to common stock on June 26, 2023. Subsidiary Preferred Stock First Horizon Bank has issued 300,000 shares of Class A Non-Cumulative Perpetual Preferred Stock (Class A Preferred Stock) with a liquidation preference of $1,000 per share. Dividends on the Class A Preferred Stock, if declared, accrue and are payable each quarter, in arrears, at a floating rate equal to the greater of three-month CME Term SOFR plus 1.11161% (0.26161% plus 0.85%) or 3.75% per annum. These securities qualify fully as Tier 1 capital for both First Horizon Bank and FHN. On September 30, 2023 and December 31, 2022, $295 million of Class A Preferred Stock was recognized as noncontrolling interest on the Consolidated Balance Sheets. LIBOR Change to SOFR On March 5, 2021, the U.K.'s Financial Conduct Authority announced that all tenors of LIBOR would cease publication or no longer be representative after June 30, 2023. On March 15, 2022, the Adjustable Interest Rate (LIBOR) Act was enacted in the U.S. The LIBOR Act provides that LIBOR will transition to a replacement benchmark based on the Secured Overnight Financing Rate (SOFR), plus a spread adjustment, in such covered contracts. Subsequently, the FRB adopted Regulation ZZ that identified CME Term SOFR, a forward term rate based on SOFR administered by CME Group Benchmark Administration, Ltd., plus a spread adjustment, as the replacement rate for securities for any interest rate calculations after June 30, 2023. On April 25, 2023, FHN announced that each reference to LIBOR in each applicable securities contract (which term includes preferred stock and related depositary shares) will transition to CME Term SOFR, plus a tenor-based spread adjustment, on the first business day after June 30, 2023 pursuant to the LIBOR Act and the implementing regulations. The information presented in this Note reflects that transition.

Components of Other Comprehensi

Components of Other Comprehensive Income (Loss)	9 Months Ended
Components of Other Comprehensive Income (Loss)	Sep. 30, 2023
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Other Comprehensive Income (Loss)	Components of Other Comprehensive Income (Loss) The following table provides the changes in accumulated other comprehensive income (loss) by component, net of tax, for the three and nine months ended September 30, 2023 and 2022: ACCUMULATED OTHER COMPREHENSIVE INCOME (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of July 1, 2023 $ (964) $ (129) $ (266) $ (1,359) Net unrealized gains (losses) (206) (34) 1 (239) Amounts reclassified from AOCI — 14 2 16 Other comprehensive income (loss) (206) (20) 3 (223) Balance as of September 30, 2023 $ (1,170) $ (149) $ (263) $ (1,582) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of January 1, 2023 $ (973) $ (127) $ (268) $ (1,368) Net unrealized gains (losses) (197) (60) (1) (258) Amounts reclassified from AOCI — 38 6 44 Other comprehensive income (loss) (197) (22) 5 (214) Balance as of September 30, 2023 $ (1,170) $ (149) $ (263) $ (1,582) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of July 1, 2022 $ (671) $ (40) $ (252) $ (963) Net unrealized gains (losses) (368) (103) — (471) Amounts reclassified from AOCI — 4 3 7 Other comprehensive income (loss) (368) (99) 3 (464) Balance as of September 30, 2022 $ (1,039) $ (139) $ (249) $ (1,427) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of January 1, 2022 $ (36) $ 3 $ (255) $ (288) Net unrealized gains (losses) (1,003) (149) — (1,152) Amounts reclassified from AOCI — 7 6 13 Other comprehensive income (loss) (1,003) (142) 6 (1,139) Balance as of September 30, 2022 $ (1,039) $ (139) $ (249) $ (1,427) Reclassifications from AOCI, and related tax effects, were as follows: RECLASSIFICATIONS FROM AOCI (Dollars in millions) Three Months Ended Nine Months Ended Details about AOCI 2023 2022 2023 2022 Affected line item in the statement where net Cash Flow Hedges: Realized (gains) losses on cash flow hedges $ 18 $ 5 $ 50 $ 9 Interest and fees on loans and leases Tax expense (benefit) (4) (1) (12) (2) Income tax expense 14 4 38 7 Pension and Postretirement Plans: Amortization of prior service cost and net actuarial (gain) loss 3 4 8 8 Other expense Tax expense (benefit) (1) (1) (2) (2) Income tax expense 2 3 6 6 Total reclassification from AOCI $ 16 $ 7 $ 44 $ 13

Earnings Per Share

Earnings Per Share	9 Months Ended
Earnings Per Share	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The computations of basic and diluted earnings per common share were as follows: EARNINGS PER SHARE COMPUTATIONS Three Months Ended Nine Months Ended (Dollars in millions, except per share data; shares in thousands) 2023 2022 2023 2022 Net income $ 142 $ 268 $ 727 $ 642 Net income attributable to noncontrolling interest 5 3 14 8 Net income attributable to controlling interest 137 265 713 634 Preferred stock dividends 8 8 24 24 Net income available to common shareholders $ 129 $ 257 $ 689 $ 610 Weighted average common shares outstanding—basic 558,559 535,986 544,952 534,613 Effect of dilutive restricted stock, performance equity awards and options 2,862 6,655 4,250 7,258 Effect of dilutive convertible preferred stock (a) — 27,512 12,728 21,667 Weighted average common shares outstanding—diluted 561,421 570,153 561,930 563,538 Basic earnings per common share $ 0.23 $ 0.48 $ 1.26 $ 1.14 Diluted earnings per common share $ 0.23 $ 0.45 $ 1.23 $ 1.08 (a) On February 28, 2022, FHN issued $494 million of Series G Convertible Preferred Stock, which was converted into common stock on June 26, 2023, following the termination of the TD Merger Agreement. Conversion occurred at the rate of 4,000 common shares per Series G preferred share resulting in 19,742,776 additional common shares outstanding. 2023 includes the impact of the Series G based on the final conversion rate and 2022 includes the impact based on the original maximum conversion rate. For more information on the convertible features, including the conversion rate, see Note 7 - Preferred Stock. The following table presents average outstanding options and other equity awards that were excluded from the calculation of diluted earnings per share because they were either anti-dilutive (the exercise price was higher than the weighted-average market price for the period) or the performance conditions have not been met: ANTI-DILUTIVE EQUITY AWARDS Three Months Ended Nine Months Ended (Shares in thousands) 2023 2022 2023 2022 Stock options excluded from the calculation of diluted EPS 1,928 11 — 35 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 16.44 $ 26.03 $ 24.36 $ 25.65 Other equity awards excluded from the calculation of diluted EPS 7,589 493 2,496 199

Contingencies and Other Disclos

Contingencies and Other Disclosures	9 Months Ended
Contingencies and Other Disclosures	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Other Disclosures	Contingencies and Other Disclosures Contingencies Contingent Liabilities Overview Contingent liabilities arise in the ordinary course of business. Often, they are related to lawsuits, arbitration, mediation, and other forms of litigation. Various litigation matters currently are threatened or pending against FHN and its subsidiaries. Also, FHN at times receives requests for information, subpoenas, or other inquiries from federal, state, and local regulators, from other government authorities, and from other parties concerning various matters relating to FHN’s current or former businesses. Certain matters of that sort are pending at most times, and FHN generally cooperates when those matters arise. Pending and threatened litigation matters sometimes are settled by the parties, and sometimes pending matters are resolved in court or before an arbitrator, or are withdrawn. Regardless of the manner of resolution, frequently the most significant changes in status of a matter occur over a short time period, often following a lengthy period of little substantive activity. In view of the inherent difficulty of predicting the outcome of these matters, particularly where the claimants seek very large or indeterminate damages, or where the cases present novel legal theories or involve a large number of parties, or where claims or other actions may be possible but have not been brought, FHN cannot reasonably determine what the eventual outcome of the matters will be, what the timing of the ultimate resolution of these matters may be, or what the eventual loss or impact related to each matter may be. FHN establishes a loss contingency liability for a litigation matter when loss is both probable and reasonably estimable as prescribed by applicable financial accounting guidance. If loss for a matter is probable and a range of possible loss outcomes is the best estimate available, accounting guidance requires a liability to be established at the low end of the range. Based on current knowledge, and after consultation with counsel, management is of the opinion that loss contingencies related to threatened or pending litigation matters should not have a material adverse effect on the consolidated financial condition of FHN but may be material to FHN’s operating results for any particular reporting period depending, in part, on the results from that period. Material Loss Contingency Matters As used in this Note, except for matters that are reported as having been substantially settled or otherwise substantially resolved, FHN's “material loss contingency matters” generally fall into at least one of the following categories: (i) FHN has determined material loss to be probable and has established a material loss liability in accordance with applicable financial accounting guidance; (ii) FHN has determined material loss to be probable but is not reasonably able to estimate an amount or range of material loss liability; or (iii) FHN has determined that material loss is not probable but is reasonably possible, and the amount or range of that reasonably possible material loss is estimable. As defined in applicable accounting guidance, loss is reasonably possible if there is more than a remote chance of a material loss outcome for FHN. FHN provides contingencies note disclosures for certain pending or threatened litigation matters each quarter, including all matters mentioned in categories (i) or (ii) and, occasionally, certain matters mentioned in category (iii). In addition, in this Note, certain other matters, or groups of matters, are discussed relating to FHN’s pre-2009 mortgage origination and servicing businesses. In all litigation matters discussed in this Note, unless settled or otherwise resolved, FHN believes it has meritorious defenses and intends to pursue those defenses vigorously. FHN reassesses the liability for litigation matters each quarter as the matters progress. At September 30, 2023, the aggregate amount of liabilities established for all such loss contingency matters was $2 million. These liabilities are separate from those discussed under the heading Mortgage Loan Repurchase and Foreclosure Liability below. In each material loss contingency matter, except as otherwise noted, there is more than a remote chance that any of the following outcomes will occur: the plaintiff will substantially prevail; the defense will substantially prevail; the plaintiff will prevail in part; or the matter will be settled by the parties. At September 30, 2023, FHN estimates that for all material loss contingency matters, estimable reasonably possible losses in future periods in excess of currently established liabilities could aggregate in a range from zero to less than $1 million. As a result of the general uncertainties discussed above and the specific uncertainties discussed for each matter mentioned below, it is possible that the ultimate future loss experienced by FHN for any particular matter may materially exceed the amount, if any, of currently established liability for that matter. Mortgage Loan Repurchase and Foreclosure Liability FHN’s repurchase and foreclosure liability, primarily related to its pre-2009 mortgage origination, sale, securitization, and servicing businesses, is comprised of accruals to cover estimated loss content in the active pipeline, estimated future inflows, and estimated loss content related to certain known claims not currently included in the active pipeline. The active pipeline consists of mortgage loan repurchase and make-whole demands from loan purchasers or securitization participants, foreclosure/servicing demands from borrowers, and certain related exposures. FHN compares the estimated probable incurred losses determined under the applicable loss estimation approaches for the respective periods with current reserve levels. Changes in the estimated required liability levels are recorded as necessary through the repurchase and foreclosure provision. Based on currently available information and experience to date, FHN has evaluated its loan repurchase, make-whole, foreclosure, and certain related exposures and has accrued for losses of $16 million as of both September 30, 2023 and December 31, 2022. Accrued liabilities for FHN’s estimate of these obligations are reflected in other liabilities on the Consolidated Balance Sheets. Charges/expense reversals to increase/decrease the liability are included within other income on the Consolidated Statements of Income. The estimates are based upon currently available information and fact patterns that exist as of each balance sheet date and could be subject to future changes. Changes to any one of these factors could significantly impact the estimate of FHN’s liability. The most significant outstanding claim associated with FHN's pre-2009 businesses is a servicing indemnification claim asserted by Nationstar Mortgage LLC, currently doing business as “Mr. Cooper.” Nationstar was the purchaser of FHN’s mortgage servicing obligations and assets in 2013 and 2014 and was FHN’s subservicer. Nationstar asserts several categories of indemnity obligations in connection with mortgage loans under the subservicing arrangement and under the purchase transaction. This matter currently is not in litigation, but litigation in the future is possible. FHN is unable to estimate an RPL range for this matter due to significant uncertainties regarding: the exact nature of each of Nationstar’s claims and its position in respect of each; the number of, and the facts underlying, the claimed instances of indemnifiable events; the applicability of FHN’s contractual indemnity covenants to those facts and events; and, in those cases where the facts and events might support an indemnity claim, whether any legal defenses, counterclaims, other counter-positions, or third-party claims might eliminate or reduce claims against FHN or their impact on FHN. Other Disclosures Indemnification Agreements and Guarantees In the ordinary course of business, FHN enters into indemnification agreements for legal proceedings against its directors and officers and standard representations and warranties for underwriting agreements, merger and acquisition agreements, loan sales, contractual commitments, and various other business transactions or arrangements. The extent of FHN’s obligations under these agreements depends upon the occurrence of future events; therefore, it is not possible to estimate a maximum potential amount of payouts that could be required by such agreements.

Retirement Plans

Retirement Plans	9 Months Ended
Retirement Plans	Sep. 30, 2023
Retirement Benefits, Description [Abstract]
Retirement Plans	Retirement Plans FHN sponsors a noncontributory, qualified defined benefit pension plan to employees hired or re-hired on or before September 1, 2007. Pension benefits are based on years of service, average compensation near retirement or other termination, and estimated social security benefits at age 65. Benefits under the plan are “frozen” so that years of service and compensation changes after 2012 do not affect the benefit owed. Minimum contributions are based upon actuarially determined amounts necessary to fund the total benefit obligation. Decisions to contribute to the plan are based upon pension funding requirements under the Pension Protection Act, the maximum amount deductible under the Internal Revenue Code, the actual performance of plan assets, and trends in the regulatory environment. FHN made no contributions to the qualified pension plan in 2022. Management does not currently anticipate that FHN will make a contribution to the qualified pension plan in 2023. FHN also maintains non-qualified plans including a supplemental retirement plan that covers certain employees whose benefits under the qualified pension plan have been limited by tax rules. These other non-qualified plans are unfunded, and contributions to these plans cover all benefits paid under the non-qualified plans. Payments made under the non-qualified plans were $5 million for 2022. FHN anticipates making benefit payments under the non-qualified plans of $5 million in 2023. Service cost is included in personnel expense in the Consolidated Statements of Income. All other components of net periodic benefit cost are included in other expense. For more information on FHN's pension plan and other postretirement benefit plans, see Note 17 - Retirement Plans and Other Employee Benefits in FHN's 2022 Annual Report on Form 10-K. The components of net periodic benefit cost for the three and nine months ended September 30 were as follows: COMPONENTS OF NET PERIODIC BENEFIT COST Three months ended September 30, Nine months ended September 30, (Dollars in millions) 2023 2022 2023 2022 Components of net periodic benefit cost Interest cost $ 10 $ 5 $ 26 $ 15 Expected return on plan assets (9) (6) (25) (18) Amortization of unrecognized: Actuarial (gain) loss 3 4 9 8 Net periodic benefit cost $ 4 $ 3 $ 10 $ 5

Business Segment Information

Business Segment Information	9 Months Ended
Business Segment Information	Sep. 30, 2023
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information FHN's operating segments are composed of the following: • Regional Banking segment offers financial products and services, including traditional lending and deposit taking, to commercial and consumer clients primarily in the southern U.S. and other selected markets. Regional Banking also provides investment, wealth management, financial planning, trust and asset management services for consumer clients. • Specialty Banking segment consists of lines of business that deliver product offerings and services with specialized industry knowledge. Specialty Banking’s lines of business include asset-based lending, mortgage warehouse lending, commercial real estate, franchise finance, correspondent banking, equipment finance, mortgage, and title insurance (prior to July 2022). In addition to traditional lending and deposit taking, Specialty Banking also delivers treasury management solutions, loan syndications, and international banking. Additionally, Specialty Banking has a line of business focused on fixed income securities sales, trading, underwriting, and strategies for institutional clients in the U.S. and abroad, as well as loan sales, portfolio advisory services, and derivative sales. • Corporate segment consists primarily of corporate support functions including risk management, audit, accounting, finance, executive office, and corporate communications. Shared support services such as human resources, properties, technology, credit risk and bank operations are allocated to the activities of Regional Banking, Specialty Banking and Corporate. Additionally, the Corporate segment includes centralized management of capital and funding to support the business activities of the company including management of wholesale funding, liquidity, and capital management and allocation. The Corporate segment also includes the revenue and expense associated with run-off businesses such as pre-2009 mortgage banking elements, run-off consumer and trust preferred loan portfolios, and other exited businesses. Periodically, FHN adapts its segments to reflect managerial or strategic changes. FHN may also modify its methodology of allocating expenses and equity among segments which could change historical segment results. Business segment revenue, expense, asset, and equity levels reflect those which are specifically identifiable, or which are allocated based on an internal allocation method. Because the allocations are based on internally developed assignments and allocations, to an extent they are subjective. Generally, all assignments and allocations have been consistently applied for all periods presented. The following tables present financial information for each reportable business segment for the three and nine months ended September 30, 2023 and 2022: SEGMENT FINANCIAL INFORMATION Three Months Ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 583 $ 135 $ (113) $ 605 Provision for credit losses 104 6 — 110 Noninterest income 109 46 18 173 Noninterest expense (b) 318 89 67 474 Income (loss) before income taxes 270 86 (162) 194 Income tax expense (benefit) (c) 63 21 (32) 52 Net income (loss) $ 207 $ 65 $ (130) $ 142 Average assets $ 46,657 $ 20,687 $ 15,876 $ 83,220 Three Months Ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 518 $ 138 $ 6 $ 662 Provision for credit losses 43 17 — 60 Noninterest income (a) 110 64 39 213 Noninterest expense (b) 303 105 61 469 Income (loss) before income taxes 282 80 (16) 346 Income tax expense (benefit) 66 19 (7) 78 Net income (loss) $ 216 $ 61 $ (9) $ 268 Average assets $ 42,820 $ 19,745 $ 19,986 $ 82,551 (a) 2022 includes a $21 million gain related to the sale of the title insurance business and a $10 million gain on equity securities in the Corporate segment. (b) 2023 includes $10 million of restructuring costs in the Corporate segment. 2022 includes $24 million in merger and integration expenses related to the IBKC merger and TD Transaction in the Corporate segment. (c) 2023 includes $24 million in expense related to the surrender of bank owned life insurance policies and an $11 million benefit from merger-related tax items in the Corporate segment. Nine Months Ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 1,781 $ 390 $ (248) $ 1,923 Provision for credit losses 189 26 (5) 210 Noninterest income (a) 325 147 273 745 Noninterest expense (b) 960 270 278 1,508 Income (loss) before income taxes 957 241 (248) 950 Income tax expense (benefit) (c) 224 58 (59) 223 Net income (loss) $ 733 $ 183 $ (189) $ 727 Average assets $ 45,594 $ 20,054 $ 15,823 $ 81,471 Nine Months Ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 1,410 $ 423 $ (150) $ 1,683 Provision for credit losses 64 (4) (10) 50 Noninterest income (a) 337 265 40 642 Noninterest expense (b) 906 352 192 1,450 Income (loss) before income taxes 777 340 (292) 825 Income tax expense (benefit) 182 83 (82) 183 Net income (loss) $ 595 $ 257 $ (210) $ 642 Average assets $ 41,779 $ 20,073 $ 23,947 $ 85,799 (a) 2023 includes a $225 million gain on merger termination in the Corporate segment. 2022 includes a $12 million gain on sale of mortgage servicing rights in the Specialty Banking segment and a $21 million gain related to the sale of the title insurance business, a $10 million gain on equity securities and a $6 million gain related to a fintech investment in the Corporate segment. (b) 2023 includes $10 million of restructuring costs, a $50 million contribution to the First Horizon Foundation, $15 million in derivative valuation adjustments related to prior Visa Class-B share sales and $51 million in merger and integration planning expenses related to the TD Transaction in the Corporate segment. 2022 includes $99 million in merger and integration expenses related to the IBKC merger and TD Transaction and $12 million in derivative valuation adjustments related to prior Visa Class-B share sales in the Corporate segment. (c) 2023 includes $24 million in expense related to the surrender of bank owned life insurance policies and an $11 million benefit from merger-related tax items in the Corporate segment. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three and nine months ended September 30, 2023 and 2022: NONINTEREST INCOME DETAIL BY SEGMENT Three months ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 41 $ 3 $ 2 $ 46 Fixed income (a) — 28 — 28 Brokerage, management fees and commissions 21 — — 21 Card and digital banking fees 19 — 1 20 Other service charges and fees 7 7 — 14 Trust services and investment management 12 — — 12 Mortgage banking and title income — 7 — 7 Other income (c) 9 1 15 25 Total noninterest income $ 109 $ 46 $ 18 $ 173 Three months ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 39 $ 2 $ 2 $ 43 Fixed income (a) — 46 — 46 Brokerage, management fees and commissions 23 — — 23 Card and digital banking fees 19 — 2 21 Other service charges and fees 8 5 — 13 Trust services and investment management 11 — — 11 Mortgage banking and title income — 9 — 9 Deferred compensation income — — (3) (3) Securities gains (losses), net (b) — — 12 12 Other income (c) 10 2 26 38 Total noninterest income $ 110 $ 64 $ 39 $ 213 (a) 2023 and 2022 includes $13 million of underwriting, portfolio advisory, and other noninterest income in scope of ASC 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes letter of credit fees and insurance commissions in scope of ASC 606. Nine months ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 120 $ 7 $ 6 $ 133 Fixed income (a) — 98 (1) 97 Brokerage, management fees and commissions 66 — — 66 Card and digital banking fees 55 1 5 61 Other service charges and fees 23 18 — 41 Trust services and investment management 35 — — 35 Mortgage banking and title income — 18 — 18 Deferred compensation income — — 11 11 Gain on merger termination — — 225 225 Securities gains (losses), net (b) — — 1 1 Other income (c) 26 5 26 57 Total noninterest income $ 325 $ 147 $ 273 $ 745 Nine months ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 115 $ 7 $ 7 $ 129 Fixed income (a) — 170 — 170 Brokerage, management fees and commissions 71 — — 71 Card and digital banking fees 57 2 5 64 Other service charges and fees 24 17 — 41 Trust services and investment management 36 — — 36 Mortgage banking and title income — 65 — 65 Deferred compensation income — — (24) (24) Securities gains (losses), net (b) — — 18 18 Other income (c) 34 4 34 72 Total noninterest income $ 337 $ 265 $ 40 $ 642 (a) 2023 and 2022 includes $32 million and $33 million, respectively, of underwriting, portfolio advisory, and other noninterest income in scope of ASC 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes letter of credit fees and insurance commissions in scope of ASC 606.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
Variable Interest Entities	Sep. 30, 2023
Variable Interest Entities [Abstract]
Variable Interest Entities	Variable Interest Entities FHN makes equity investments in various entities that are considered VIEs, as defined by GAAP. A VIE typically does not have sufficient equity at risk to finance its activities without additional subordinated financial support from other parties. The Company’s variable interest arises from contractual, ownership, or other monetary interests in the entity, which change with fluctuations in the fair value of the entity's net assets. FHN consolidates a VIE if FHN is the primary beneficiary of the entity. FHN is the primary beneficiary of a VIE if FHN's variable interest provides it with the power to direct the activities that most significantly impact the VIE and the right to receive benefits (or the obligation to absorb losses) that could potentially be significant to the VIE. To determine whether or not a variable interest held could potentially be significant to the VIE, FHN considers both qualitative and quantitative factors regarding the nature, size and form of its involvement with the VIE. FHN assesses whether or not it is the primary beneficiary of a VIE on an ongoing basis. Consolidated Variable Interest Entities FHN has established certain rabbi trusts related to deferred compensation plans offered to its employees. FHN contributes employee cash compensation deferrals to the trusts and directs the underlying investments made by the trusts. The assets of these trusts are available to FHN’s creditors only in the event that FHN becomes insolvent. These trusts are considered VIEs as there is no equity at risk in the trusts since FHN provided the equity interest to its employees in exchange for services rendered. FHN is considered the primary beneficiary of the rabbi trusts as it has the power to direct the activities that most significantly impact the economic performance of the rabbi trusts through its ability to direct the underlying investments made by the trusts. Additionally, FHN could potentially receive benefits or absorb losses that are significant to the trusts due to its right to receive any asset values in excess of liability payoffs and its obligation to fund any liabilities to employees that are in excess of a rabbi trust’s assets. The following table summarizes the carrying value of assets and liabilities associated with rabbi trusts used for deferred compensation plans which are consolidated by FHN as of September 30, 2023 and December 31, 2022: CONSOLIDATED VIEs (Dollars in millions) September 30, 2023 December 31, 2022 Assets: Other assets $ 172 $ 181 Liabilities: Other liabilities $ 144 $ 150 Nonconsolidated Variable Interest Entities Low Income Housing Tax Credit Partnerships Through designated wholly-owned subsidiaries, First Horizon Bank makes equity investments as a limited partner in various partnerships that sponsor affordable housing projects utilizing the LIHTC. The purpose of these investments is to achieve a satisfactory return on capital and to support FHN’s community reinvestment initiatives. LIHTC partnerships are managed by unrelated general partners that have the power to direct the activities which most significantly affect the performance of the partnerships. FHN is therefore not the primary beneficiary of any LIHTC partnerships. Accordingly, FHN does not consolidate these VIEs and accounts for these investments in other assets on the Consolidated Balance Sheets. FHN accounts for all qualifying LIHTC investments under the proportional amortization method. Under this method an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance as a component of income tax expense. LIHTC investments that do not qualify for the proportional amortization method are accounted for using the equity method. Expenses associated with non-qualifying LIHTC investments were not material for the three and nine months ended September 30, 2023 and 2022. The following table summarizes the impact to income tax expense on the Consolidated Statements of Income for the three and nine months ended September 30, 2023 and 2022 for LIHTC investments accounted for under the proportional amortization method. LIHTC IMPACTS ON TAX EXPENSE Three Months Ended Nine Months Ended (Dollars in millions) 2023 2022 2023 2022 Income tax expense (benefit): Amortization of qualifying LIHTC investments $ 13 $ 11 $ 39 $ 33 Low income housing tax credits (14) (11) (41) (35) Other tax benefits related to qualifying LIHTC investments (3) (3) (8) (9) Other Tax Credit Investments Through designated subsidiaries, First Horizon Bank periodically makes equity investments as a non-managing member in various LLCs that sponsor community development projects utilizing the NMTC. First Horizon Bank also makes equity investments as a limited partner or non-managing member in entities that receive solar and historic tax credits. The purposes of these investments are to achieve a satisfactory return on capital and to support FHN’s community reinvestment initiatives. These entities are considered VIEs as First Horizon Bank's subsidiaries represent the holders of the equity investment at risk, but do not have the ability to direct the activities that most significantly affect the performance of the entities. Small Issuer Trust Preferred Holdings First Horizon Bank holds variable interests in trusts which have issued mandatorily redeemable preferred capital securities (“trust preferreds”) for smaller banking and insurance enterprises. First Horizon Bank has no voting rights for the trusts’ activities. The trusts’ only assets are junior subordinated debentures of the issuing enterprises. The creditors of the trusts hold no recourse to the assets of First Horizon Bank. Since First Horizon Bank is solely a holder of the trusts’ securities, it has no rights which would give it the power to direct the activities that most significantly impact the trusts’ economic performance and thus it is not considered the primary beneficiary of the trusts. First Horizon Bank has no contractual requirements to provide financial support to the trusts. On-Balance Sheet Trust Preferred Securitization In 2007, First Horizon Bank executed a securitization of certain small issuer trust preferreds for which the underlying trust meets the definition of a VIE as the holders of the equity investment at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entity’s economic performance. Since First Horizon Bank did not retain servicing or other decision-making rights, First Horizon Bank is not the primary beneficiary as it does not have the power to direct the activities that most significantly impact the trust’s economic performance. Accordingly, First Horizon Bank has accounted for the funds received through the securitization as a term borrowing in its Consolidated Balance Sheets. First Horizon Bank has no contractual requirements to provide financial support to the trust. Holdings in Agency Mortgage-Backed Securities FHN holds securities issued by various Agency securitization trusts. Based on their restrictive nature, the trusts meet the definition of a VIE since the holders of the equity investments at risk do not have the power through voting rights, or similar rights, to direct the activities that most significantly impact the entities’ economic performance. FHN could potentially receive benefits or absorb losses that are significant to the trusts based on the nature of the trusts’ activities and the size of FHN’s holdings. However, FHN is solely a holder of the trusts’ securities and does not have the power to direct the activities that most significantly impact the trusts’ economic performance and is not considered the primary beneficiary of the trusts. FHN has no contractual requirements to provide financial support to the trusts. Commercial Loan Modifications to Borrowers Experiencing Financial Difficulty For certain troubled commercial loans, First Horizon Bank modifies the terms of the borrower’s debt in an effort to increase the probability of receipt of amounts contractually due. Following a modification to borrowers experiencing financial difficulty, the borrower entity typically meets the definition of a VIE as the initial determination of whether an entity is a VIE must be reconsidered as events have proven that the entity’s equity is not sufficient to permit it to finance its activities without additional subordinated financial support or a restructuring of the terms of its financing. As First Horizon Bank does not have the power to direct the activities that most significantly impact such troubled commercial borrowers’ operations, it is not considered the primary beneficiary even in situations where, based on the size of the financing provided, First Horizon Bank is exposed to potentially significant benefits and losses of the borrowing entity. First Horizon Bank has no contractual requirements to provide financial support to the borrowing entities beyond certain funding commitments established upon restructuring of the terms of the debt that allows for preparation of the underlying collateral for sale. Proprietary Trust Preferred Issuances In conjunction with its acquisitions, FHN acquired junior subordinated debt underlying multiple issuances of trust preferred debt. All of the trusts are considered VIEs because the ownership interests from the capital contributions to these trusts are not considered “at risk” in evaluating whether the holders of the equity investments at risk in the trusts have the ability to direct the activities that most significantly impact the entities’ economic performance. Thus, FHN cannot be the trusts’ primary beneficiary because its ownership interests in the trusts are not considered variable interests as they are not considered “at risk”. Consequently, none of the trusts are consolidated by FHN. The following tables summarize FHN’s nonconsolidated VIEs as of September 30, 2023 and December 31, 2022: NONCONSOLIDATED VIEs AT SEPTEMBER 30, 2023 (Dollars in millions) Maximum Liability Classification Type Low income housing partnerships $ 498 $ 155 (a) Other tax credit investments (b) 81 65 Other assets Small issuer trust preferred holdings (c) 173 — Loans and leases On-balance sheet trust preferred securitization 27 87 (d) Holdings of agency mortgage-backed securities (c) 7,907 — (e) Commercial loan modifications to borrowers experiencing financial difficulty (f) 39 — Loans and leases Proprietary trust preferred issuances (g) — 167 Term borrowings (a) Maximum loss exposure represents $343 million of current investments and $155 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events and are also recognized in other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2024. (b) Maximum loss exposure represents the value of current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112 million classified as loans and leases and $2 million classified as trading securities, which are offset by $87 million classified as term borrowings. (e) Includes $147 million classified as trading securities, $1.3 billion classified as held to maturity and $6.4 billion classified as securities available for sale. (f) Maximum loss exposure represents $39 million of current receivables with no additional contractual funding commitments on loans related to commercial loan modifications to borrowers experiencing financial difficulty. (g) No exposure to loss due to nature of FHN's involvement. NONCONSOLIDATED VIEs AT DECEMBER 31, 2022 (Dollars in millions) Maximum Liability Classification Type Low income housing partnerships $ 463 $ 154 (a) Other tax credit investments (b) 85 67 Other assets Small issuer trust preferred holdings (c) 171 — Loans and leases On-balance sheet trust preferred securitization 27 87 (d) Holdings of agency mortgage-backed securities (c) 8,652 — (e) Commercial loan troubled debt restructurings (f) 53 — Loans and leases Proprietary trust preferred issuances (g) — 167 Term borrowings (a) Maximum loss exposure represents $309 million of current investments and $154 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events and are also recognized in other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2024. (b) Maximum loss exposure represents current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112 million classified as loans and leases and $2 million classified as trading securities, which are offset by $87 million classified as term borrowings. (e) Includes $205 million classified as trading securities, $1.4 billion classified as held to maturity and $7.1 billion classified as securities available for sale. (f) Maximum loss exposure represents $53 million of current receivables with no additional contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (g) No exposure to loss due to nature of FHN's involvement.

Derivatives

Derivatives	9 Months Ended
Derivatives	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives In the normal course of business, FHN utilizes various financial instruments (including derivative contracts and credit-related agreements) through its fixed income and risk management operations, as part of its risk management strategy and as a means to meet clients’ needs. Derivative instruments are subject to credit and market risks in excess of the amount recorded on the balance sheet as required by GAAP. The contractual or notional amounts of these financial instruments do not necessarily represent the amount of credit or market risk. However, they can be used to measure the extent of involvement in various types of financial instruments. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. The ALCO controls, coordinates, and monitors the usage and effectiveness of these financial instruments. Credit risk represents the potential loss that may occur if a party to a transaction fails to perform according to the terms of the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. FHN manages credit risk by entering into financial instrument transactions through national exchanges, primary dealers or approved counterparties, and by using mutual margining and master netting agreements whenever possible to limit potential exposure. FHN also maintains collateral posting requirements with certain counterparties to limit credit risk. Daily margin posted or received with central clearinghouses is considered a legal settlement of the related derivative contracts which results in a net presentation for each contract in the Consolidated Balance Sheets. Treatment of daily margin as a settlement has no effect on hedge accounting or gains/losses for the applicable derivative contracts. On September 30, 2023 and December 31, 2022, respectively, FHN had $629 million and $159 million of cash receivables and $27 million and $42 million of cash payables related to collateral posting under master netting arrangements, inclusive of collateral posted related to contracts with adjustable collateral posting thresholds and over-collateralized positions, with derivative counterparties. With exchange-traded contracts, the credit risk is limited to the clearinghouse used. For non-exchange traded instruments, credit risk may occur when there is a gain in the fair value of the financial instrument and the counterparty fails to perform according to the terms of the contract and/or when the collateral proves to be of insufficient value. See additional discussion regarding master netting agreements and collateral posting requirements later in this note under the heading “Master Netting and Similar Agreements.” Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by changes in interest rates or the prices of debt instruments. FHN manages market risk by establishing and monitoring limits on the types and degree of risk that may be undertaken. FHN continually measures this risk through the use of models that measure value-at-risk and earnings-at-risk. Derivative Instruments FHN enters into various derivative contracts both to facilitate client transactions and as a risk management tool. Where contracts have been created for clients, FHN enters into upstream transactions with dealers to offset its risk exposure. Contracts with dealers that require central clearing are novated to a clearing agent who becomes FHN’s counterparty. Derivatives are also used as a risk management tool to hedge FHN’s exposure to changes in interest rates or other defined market risks. Forward contracts are over-the-counter contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Futures contracts are exchange-traded contracts where two parties agree to purchase and sell a specific quantity of a financial instrument at a specified price, with delivery or settlement at a specified date. Interest rate option contracts give the purchaser the right, but not the obligation, to buy or sell a specified quantity of a financial instrument, at a specified price, during a specified period of time. Caps and floors are options that are linked to a notional principal amount and an underlying indexed interest rate. Interest rate swaps involve the exchange of interest payments at specified intervals between two parties without the exchange of any underlying principal. Swaptions are options on interest rate swaps that give the purchaser the right, but not the obligation, to enter into an interest rate swap agreement during a specified period of time. Trading Activities FHNF trades U.S. Treasury, U.S. Agency, government-guaranteed loan, mortgage-backed, corporate and municipal fixed income securities, and other securities for distribution to clients. When these securities settle on a delayed basis, they are considered forward contracts. FHNF also enters into interest rate contracts, including caps, swaps, and floors, for its clients. In addition, FHNF enters into futures and option contracts to economically hedge interest rate risk associated with a portion of its securities inventory. These transactions are measured at fair value, with changes in fair value recognized in noninterest income. Related assets and liabilities are recorded on the Consolidated Balance Sheets as derivative assets and derivative liabilities within other assets and other liabilities. The FHNF Risk Committee and the Credit Risk Management Committee collaborate to mitigate credit risk related to these transactions. Credit risk is controlled through credit approvals, risk control limits, and ongoing monitoring procedures. Total trading revenues were $19 million and $34 million for the three months ended September 30, 2023 and 2022, $68 million and $133 million for the nine months ended September 30, 2023 and 2022, respectively. Trading revenues are inclusive of both derivative and non-derivative financial instruments and are included in fixed income on the Consolidated Statements of Income. The following table summarizes derivatives associated with FHNF's trading activities as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH TRADING September 30, 2023 (Dollars in millions) Notional Assets Liabilities Customer interest rate contracts $ 3,724 $ 4 $ 311 Offsetting upstream interest rate contracts 3,958 222 6 Forwards and futures purchased 1,202 1 7 Forwards and futures sold 1,275 8 1 December 31, 2022 (Dollars in millions) Notional Assets Liabilities Customer interest rate contracts $ 3,076 $ 3 $ 270 Offsetting upstream interest rate contracts 3,076 91 6 Option contracts purchased 40 — — Forwards and futures purchased 1,127 5 2 Forwards and futures sold 1,256 4 5 Interest Rate Risk Management FHN’s ALCO focuses on managing market risk by controlling and limiting earnings volatility attributable to changes in interest rates. Interest rate risk exists to the extent that interest-earning assets and interest-bearing liabilities have different maturity or repricing characteristics. FHN uses derivatives, primarily swaps, that are designed to moderate the impact on earnings as interest rates change. Interest paid or received for swaps utilized by FHN to hedge the fair value of long-term debt is recognized as an adjustment of the interest expense of the liabilities whose risk is being managed. FHN’s interest rate risk management policy is to use derivatives to hedge interest rate risk or market value of assets or liabilities, not to speculate. In addition, FHN has entered into certain interest rate swaps and caps as a part of a product offering to commercial clients that includes customer derivatives paired with upstream offsetting market instruments that, when completed, are designed to mitigate interest rate risk. These contracts do not qualify for hedge accounting and are measured at fair value with gains or losses included in current earnings in noninterest expense on the Consolidated Statements of Income. The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH INTEREST RATE RISK MANAGEMENT September 30, 2023 (Dollars in millions) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 8,563 $ 1 $ 631 Offsetting upstream interest rate contracts 8,563 626 2 December 31, 2022 (Dollars in millions) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 8,377 $ 3 $ 570 Offsetting upstream interest rate contracts 8,377 351 5 The following table summarizes gains (losses) on FHN’s derivatives associated with interest rate risk management activities for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH INTEREST RATE RISK MANAGEMENT Three Months Ended Nine Months Ended 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts (a) $ (95) $ 271 $ (63) $ 788 Offsetting upstream interest rate contracts (a) 95 (271) 63 (788) (a) Gains (losses) included in other expense within the Consolidated Statements of Income. Cash Flow Hedges Prior to 2021, FHN entered into pay floating, receive fixed interest rate swaps designed to manage its exposure to the variability in cash flows related to interest payments on debt instruments. The debt instruments primarily consist of held-to-maturity commercial loans that have variable interest payments that historically were based on 1-month LIBOR. In second quarter 2023, the remaining hedge was revised to reference 1-month Term SOFR after the cessation of LIBOR-based cash flows. In conjunction with the IBKC merger, FHN acquired interest rate contracts (floors and collars) which were re-designated as cash flow hedges. The debt instruments associated with these hedges also primarily consisted of held-to-maturity commercial loans that had variable interest payments that were based on 1-month LIBOR. The last hedge acquired in conjunction with the IBKC merger matured in second quarter 2023. In 2022, FHN entered into interest rate contracts (floors and swaps) which have been designated as cash flow hedges. These hedges reference 1-month Term SOFR and FHN has made certain elections under ASU 2020-04 to facilitate qualification for hedge accounting during the time that hedged items transition away from 1-Month LIBOR. In a cash flow hedge, the entire change in the fair value of the interest rate derivatives included in the assessment of hedge effectiveness is initially recorded in OCI and is subsequently reclassified from OCI to current period earnings (interest income or interest expense) in the same period that the hedged item affects earnings. The following tables summarize FHN’s derivative activities associated with cash flow hedges as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH CASH FLOW HEDGES September 30, 2023 (Dollars in millions) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 5,200 $ — $ 118 Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 5,200 N/A December 31, 2022 (Dollars in millions) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 5,350 $ — $ 71 Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 5,350 N/A The following table summarizes gains (losses) on FHN’s derivatives associated with cash flow hedges for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH CASH FLOW HEDGES Three Months Ended Nine Months Ended 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Cash Flow Hedges Hedging Instruments: Interest rate contracts (a) $ (30) $ (138) $ (44) $ (105) Gain (loss) recognized in other comprehensive income (loss) (34) (103) (60) (149) Gain (loss) reclassified from AOCI into interest income 14 4 38 7 (a) Approximately $29 million of pre-tax losses are expected to be reclassified into earnings in the next twelve months. Other Derivatives FHN has mortgage banking operations that include the origination and sale of loans into the secondary market. As part of the origination of loans, FHN enters into interest rate lock commitments with borrowers. Additionally, FHN enters into forward sales contracts with buyers for delivery of loans at a future date. Both of these contracts qualify as freestanding derivatives and are recognized at fair value through earnings. The notional and fair values of these contracts are presented in the table below. DERIVATIVES ASSOCIATED WITH MORTGAGE BANKING HEDGES September 30, 2023 (Dollars in millions) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 84 $ 1 $ — Forward contracts written 129 1 — December 31, 2022 (Dollars in millions) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 35 $ — $ — Forward contracts written 61 — — The following table summarizes gains (losses) on FHN's derivatives associated with mortgage banking activities for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH MORTGAGE BANKING HEDGES Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Mortgage Banking Hedges Option contracts written $ — $ 4 $ (2) $ 5 Forward contracts written (2) 6 2 33 In conjunction with pre-2020 sales of Visa Class B shares, FHN entered into derivative transactions whereby FHN will make or receive cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. As of September 30, 2023 and December 31, 2022, the derivative liabilities associated with the sales of Visa Class B shares were $26 million and $27 million, respectively. FHN recognized $15 million in derivative valuation adjustments related to prior sales of Visa Class B shares for the nine months ended September 30, 2023 and $22 million in derivative valuation adjustments related to prior sales of Visa Class B shares for the year ended December 31, 2022. See Note 16 - Fair Value of Assets and Liabilities for discussion of the valuation inputs and processes for these Visa-related derivatives. FHN utilizes cross currency swaps and cross currency interest rate swaps to economically hedge its exposure to foreign currency risk and interest rate risk associated with non-U.S. dollar denominated loans. As of September 30, 2023 and December 31, 2022, these loans were valued at $16 million and $9 million, respectively. The balance sheet amount and the gains/losses associated with these derivatives were not significant. Related to its loan participation/syndication activities, FHN enters into risk participation agreements, under which it assumes exposure for, or receives indemnification for, borrowers’ performance on underlying interest rate derivative contracts. FHN's counterparties in these contracts are other lending institutions involved in the loan participation/syndication arrangements for which the underlying interest rate derivative contract is intended to hedge interest rate risk for the borrower. FHN will make (other institution is the lead bank) or receive (FHN is the lead bank) payments for risk participations if the borrower defaults on its obligation to perform under the terms of its interest rate derivative agreement with the lead bank in the participation. As of September 30, 2023 and December 31, 2022, the notional values of FHN’s risk participations were $353 million and $242 million of derivative assets and $896 million and $742 million of derivative liabilities, respectively. The notional value for risk participation/syndication agreements is consistent with the percentage of participation in the lending arrangement. FHN's maximum exposure or benefit in the risk participation agreements is contingent on the fair value of the underlying interest rate derivative contracts for which the borrower is in a liability position at the time of default. FHN monitors the credit risk associated with the borrowers to which the risk participations relate through the same credit risk assessment process utilized for establishing credit loss estimates for its loan portfolio. These credit risk estimates are included in the determination of fair value for the risk participations. Assuming all underlying third-party customers referenced in the swap contracts defaulted at September 30, 2023 and December 31, 2022, the exposure from these agreements would not be material based on the fair value of the underlying swaps. FHN holds certain certificates of deposit with the rate of return based on an equity index which is considered an embedded derivative as a written option that must be separately recognized. The risks of the written option are offset by purchasing an option with terms that mirror the written option, which is also carried at fair value on the Company’s Consolidated Balance Sheets. As of September 30, 2023 and December 31, 2022, FHN recognized an insignificant amount of assets and liabilities associated with these contracts. Master Netting and Similar Agreements FHN uses master netting agreements, mutual margining agreements and collateral posting requirements to minimize credit risk on derivative contracts. Master netting and similar agreements are used when counterparties have multiple derivatives contracts that allow for a “right of setoff,” meaning that a counterparty may net offsetting positions and collateral with the same counterparty under the contract to determine a net receivable or payable. The following discussion provides an overview of these arrangements which may vary due to the derivative type and market in which a derivative transaction is executed. Interest rate derivatives are subject to agreements consistent with standard agreement forms of the ISDA. Currently, all interest rate derivative contracts are entered into as over-the-counter transactions and collateral posting requirements are based on the net asset or liability position with each respective counterparty. For contracts that require central clearing, novation to a counterparty with access to a clearinghouse occurs and initial margin is posted. Cash margin received (posted) that is considered settlements for the derivative contracts is included in the respective derivative asset (liability) value. Cash margin that is considered collateral received (posted) for interest rate derivatives is recognized as a liability (asset) on FHN’s Consolidated Balance Sheets. Interest rate derivatives with clients that are smaller financial institutions typically require posting of collateral by the counterparty to FHN. This collateral is subject to a threshold with daily adjustments based upon changes in the level or fair value of the derivative position. Positions and related collateral can be netted in the event of default. Collateral pledged by a counterparty is typically cash or securities. The securities pledged as collateral are not recognized within FHN’s Consolidated Balance Sheets. Interest rate derivatives associated with lending arrangements share the collateral with the related loan(s). The derivative and loan positions may be netted in the event of default. For disclosure purposes, the entire collateral amount is allocated to the loan. Interest rate derivatives with larger financial institutions typically contain provisions whereby the collateral posting thresholds under the agreements adjust based on the credit ratings of both counterparties. If the credit rating of FHN and/or First Horizon Bank is lowered, FHN could be required to post additional collateral with the counterparties. Conversely, if the credit rating of FHN and/or First Horizon Bank is increased, FHN could have collateral released and be required to post less collateral in the future. Also, if a counterparty’s credit ratings were to decrease, FHN and/or First Horizon Bank could require the posting of additional collateral; whereas if a counterparty’s credit ratings were to increase, the counterparty could require the release of excess collateral. Collateral for these arrangements is adjusted daily based on changes in the net fair value position with each counterparty. The net fair value, determined by individual counterparty, of all derivative instruments with adjustable collateral posting thresholds was $6 million of assets and $310 million of liabilities on September 30, 2023, and $5 million of assets and $268 million of liabilities on December 31, 2022. As of September 30, 2023 and December 31, 2022, FHN had received collateral of $86 million and $106 million and posted collateral of $138 million and $61 million, respectively, in the normal course of business related to these agreements. Certain agreements also contain accelerated termination provisions, inclusive of the right of offset, if a counterparty’s credit rating falls below a specified level. If a counterparty’s debt rating (including FHN’s and First Horizon Bank’s) were to fall below these minimums, these provisions would be triggered, and the counterparties could terminate the agreements and require immediate settlement of all derivative contracts under the agreements. The net fair value, determined by individual counterparty, of all interest rate derivative instruments with credit-risk-related contingent accelerated termination provisions was $624 million of assets and $310 million of liabilities on September 30, 2023, and $378 million of assets and $268 million of liabilities on December 31, 2022. As of September 30, 2023 and December 31, 2022, FHN had received collateral of $709 million and $479 million and posted collateral of $138 million and $61 million, respectively, in the normal course of business related to these contracts. FHNF buys and sells various types of securities for its clients. When these securities settle on a delayed basis, they are considered forward contracts, and are generally not subject to master netting agreements. For futures and options, FHN transacts through a third party, and the transactions are subject to margin and collateral maintenance requirements. In the event of default, open positions can be offset along with the associated collateral. For this disclosure, FHN considers the impact of master netting and other similar agreements which allow FHN to settle all contracts with a single counterparty on a net basis and to offset the net derivative asset or liability position with the related securities and cash collateral. The application of the collateral cannot reduce the net derivative asset or liability position below zero, and therefore any excess collateral is not reflected in the following tables. The following table provides details of derivative assets and collateral received as presented on the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022: DERIVATIVE ASSETS & COLLATERAL RECEIVED Gross amounts not offset in the Balance Sheets (Dollars in millions) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative assets: September 30, 2023 Interest rate derivative contracts $ 853 $ — $ 853 $ (96) $ (662) $ 95 Forward contracts 8 — 8 (4) — 4 $ 861 $ — $ 861 $ (100) $ (662) $ 99 December 31, 2022 Interest rate derivative contracts $ 449 $ — $ 449 $ (58) $ (378) $ 13 Forward contracts 9 — 9 (6) (2) 1 $ 458 $ — $ 458 $ (64) $ (380) $ 14 (a) Included in other assets on the Consolidated Balance Sheets. As of September 30, 2023 and December 31, 2022, $2 million and $2 million, respectively, of derivative assets have been excluded from these tables because they are generally not subject to master netting or similar agreements. The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022: DERIVATIVE LIABILITIES & COLLATERAL PLEDGED Gross amounts not offset (Dollars in millions) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative liabilities: September 30, 2023 Interest rate derivative contracts $ 1,068 $ — $ 1,068 $ (96) $ (238) $ 734 Forward contracts 8 — 8 (4) (1) 3 $ 1,076 $ — $ 1,076 $ (100) $ (239) $ 737 December 31, 2022 Interest rate derivative contracts $ 921 $ — $ 921 $ (58) $ (175) $ 688 Forward contracts 8 — 8 (6) (1) 1 $ 929 $ — $ 929 $ (64) $ (176) $ 689 (a) Included in other liabilities on the Consolidated Balance Sheets. As of September 30, 2023 and December 31, 2022, $27 million and $29 million, respectively, of derivative liabilities (primarily Visa-related derivatives) have been excluded from these tables because they are generally not subject to master netting or similar agreements.

Master Netting and Similar Agre

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions	9 Months Ended
	Sep. 30, 2023
Offsetting [Abstract]
Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions	Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions For repurchase, reverse repurchase and securities borrowing transactions, FHN and each counterparty have the ability to offset all open positions and related collateral in the event of default. Due to the nature of these transactions, the value of the collateral for each transaction approximates the value of the corresponding receivable or payable. For repurchase agreements through FHN’s fixed income business (securities purchased under agreements to resell and securities sold under agreements to repurchase), transactions are collateralized by securities and/or government guaranteed loans which are delivered on the settlement date and are maintained throughout the term of the transaction. For FHN’s repurchase agreements through banking activities (securities sold under agreements to repurchase), securities are typically pledged at settlement and not released until maturity. For asset positions, the collateral is not included on FHN’s Consolidated Balance Sheets. For liability positions, securities collateral pledged by FHN is generally represented within FHN’s trading or available-for-sale securities portfolios. For this disclosure, FHN considers the impact of master netting and other similar agreements that allow FHN to settle all contracts with a single counterparty on a net basis and to offset the net asset or liability position with the related securities collateral. The application of the collateral cannot reduce the net asset or liability position below zero, and therefore any excess collateral is not reflected in the tables below. Securities purchased under agreements to resell is included in federal funds sold and securities purchased under agreements to resell in the Consolidated Balance Sheets. Securities sold under agreements to repurchase is included in short-term borrowings. The following table provides details of securities purchased under agreements to resell and collateral pledged by counterparties as of September 30, 2023 and December 31, 2022: SECURITIES PURCHASED UNDER AGREEMENTS TO RESELL Gross amounts not offset in the (Dollars in millions) Gross amounts Gross amounts Net amounts of Offsetting Securities collateral Net amount Securities purchased under agreements to resell: September 30, 2023 $ 363 $ — $ 363 $ — $ (361) $ 2 December 31, 2022 353 — 353 (10) (340) 3 The following table provides details of securities sold under agreements to repurchase and collateral pledged by FHN as of September 30, 2023 and December 31, 2022: SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Gross amounts not offset in the (Dollars in millions) Gross amounts Gross amounts Net amounts of Offsetting Securities/ Net amount Securities sold under agreements to repurchase: September 30, 2023 $ 1,707 $ — $ 1,707 $ — $ (1,707) $ — December 31, 2022 1,013 — 1,013 (10) (1,003) — Due to the short duration of securities sold under agreements to repurchase and the nature of collateral involved, the risks associated with these transactions are considered minimal. The following table provides details, by collateral type, of the remaining contractual maturity of securities sold under agreements to repurchase as of September 30, 2023 and December 31, 2022: MATURITIES OF SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE September 30, 2023 (Dollars in millions) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: Government agency issued MBS $ 1,508 $ — $ 1,508 Government agency issued CMO 159 — 159 Other U.S. government agencies 40 — 40 Total securities sold under agreements to repurchase $ 1,707 $ — $ 1,707 December 31, 2022 (Dollars in millions) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 10 $ — $ 10 Government agency issued MBS 851 — 851 Government agency issued CMO 122 — 122 Other U.S. government agencies 30 — 30 Total securities sold under agreements to repurchase $ 1,013 $ — $ 1,013

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	9 Months Ended
Fair Value of Assets and Liabilities	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities FHN groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. This hierarchy requires FHN to maximize the use of observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. Each fair value measurement is placed into the proper level based on the lowest level of significant input. These levels are: • Level 1 —Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2 —Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 —Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models, and similar techniques. Recurring Fair Value Measurements The following table presents the balances of assets and liabilities measured at fair value on a recurring basis as of September 30, 2023 and December 31, 2022: BALANCES OF ASSETS & LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS September 30, 2023 (Dollars in millions) Level 1 Level 2 Level 3 Total Trading securities: U.S. treasuries $ — $ 24 $ — $ 24 Government agency issued MBS — 53 — 53 Government agency issued CMO — 94 — 94 Other U.S. government agencies — 252 — 252 States and municipalities — 26 — 26 Corporate and other debt — 759 — 759 Interest-only strips (elected fair value) — — 23 23 Total trading securities — 1,208 23 1,231 Loans held for sale (elected fair value) — 67 21 88 Securities available for sale: Government agency issued MBS — 4,325 — 4,325 Government agency issued CMO — 2,100 — 2,100 Other U.S. government agencies — 1,128 — 1,128 States and municipalities — 547 — 547 Total securities available for sale — 8,100 — 8,100 Other assets: Deferred compensation mutual funds 99 — — 99 Equity, mutual funds, and other 23 — — 23 Derivatives, forwards and futures 10 — — 10 Derivatives, interest rate contracts — 853 — 853 Total other assets 132 853 — 985 Total assets $ 132 $ 10,228 $ 44 $ 10,404 Trading liabilities: U.S. treasuries $ — $ 301 $ — $ 301 Other U.S. government agencies — 9 — 9 Government agency issued MBS — 1 — 1 Corporate and other debt — 55 — 55 Total trading liabilities — 366 — 366 Other liabilities: Derivatives, forwards and futures 8 — — 8 Derivatives, interest rate contracts — 1,068 — 1,068 Derivatives, other — — 26 26 Total other liabilities 8 1,068 26 1,102 Total liabilities $ 8 $ 1,434 $ 26 $ 1,468 December 31, 2022 (Dollars in millions) Level 1 Level 2 Level 3 Total Trading securities: U.S. treasuries $ — $ 101 $ — $ 101 Government agency issued MBS — 144 — 144 Government agency issued CMO — 61 — 61 Other U.S. government agencies — 115 — 115 States and municipalities — 54 — 54 Corporate and other debt — 875 — 875 Interest-only strips (elected fair value) — — 25 25 Total trading securities — 1,350 25 1,375 Loans held for sale (elected fair value) — 29 22 51 Securities available for sale: Government agency issued MBS — 4,763 — 4,763 Government agency issued CMO — 2,313 — 2,313 Other U.S. government agencies — 1,163 — 1,163 States and municipalities — 597 — 597 Total securities available for sale — 8,836 — 8,836 Other assets: Deferred compensation mutual funds 112 — — 112 Equity, mutual funds, and other 22 — — 22 Derivatives, forwards and futures 9 — — 9 Derivatives, interest rate contracts — 449 — 449 Derivatives, other — 2 — 2 Total other assets 143 451 — 594 Total assets $ 143 $ 10,666 $ 47 $ 10,856 Trading liabilities: U.S. treasuries $ — $ 275 $ — $ 275 Government agency issued MBS — 2 — 2 Corporate and other debt — 58 — 58 Total trading liabilities — 335 — 335 Other liabilities: Derivatives, forwards and futures 8 — — 8 Derivatives, interest rate contracts — 922 — 922 Derivatives, other — 1 27 28 Total other liabilities 8 923 27 958 Total liabilities $ 8 $ 1,258 $ 27 $ 1,293 Changes in Recurring Level 3 Fair Value Measurements The changes in Level 3 assets and liabilities measured at fair value for the three months ended September 30, 2023 and 2022 on a recurring basis are summarized as follows: CHANGES IN LEVEL 3 ASSETS & LIABILITIES MEASURED AT FAIR VALUE Three Months Ended September 30, 2023 (Dollars in millions) Interest-only strips Loans held Net Balance on July 1, 2023 $ 36 $ 22 $ (34) Total net gains (losses) included in net income (4) — — Sales (30) — — Settlements — (1) 8 Net transfers into (out of) Level 3 21 (b) — — Balance on September 30, 2023 $ 23 $ 21 $ (26) Net unrealized gains (losses) included in net income $ (2) (c) $ — (a) $ — (d) Three Months Ended September 30, 2022 (Dollars in millions) Interest-only strips Loans held Net Balance on July 1, 2022 $ 26 $ 34 $ (28) Total net gains (losses) included in net income (2) — (1) Sales (23) (14) — Settlements — — 9 Repayments — (1) — Net transfers into (out of) Level 3 22 (b) 1 — Balance on September 30, 2022 $ 23 $ 20 $ (20) Net unrealized gains (losses) included in net income $ (1) (c) $ — (a) $ (1) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in other expense. The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2023 and 2022 on a recurring basis are summarized as follows: CHANGES IN LEVEL 3 ASSETS & LIABILITIES MEASURED AT FAIR VALUE Nine Months Ended September 30, 2023 (Dollars in millions) Interest-only strips Loans held Net Balance on January 1, 2023 $ 25 $ 22 $ (27) Total net gains (losses) included in net income (10) — (15) Purchases — 2 — Sales (38) (2) — Settlements — (1) 16 Net transfers into (out of) Level 3 46 (b) — — Balance on September 30, 2023 $ 23 $ 21 $ (26) Net unrealized gains (losses) included in net income $ (4) (c) $ — (a) $ (15) (d) Nine Months Ended September 30, 2022 (Dollars in millions) Interest-only strips Loans held Net Balance on January 1, 2022 $ 38 $ 28 $ (23) Total net gains (losses) included in net income (5) — (13) Purchases — 1 — Sales (61) (14) — Settlements — (1) 16 Repayments — (1) — Net transfers into (out of) Level 3 51 (b) 7 — Balance on September 30, 2022 $ 23 $ 20 $ (20) Net unrealized gains (losses) included in net income $ (2) (c) $ — (a) $ (13) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in other expense. There were no net unrealized gains (losses) for Level 3 assets and liabilities included in other comprehensive income as of September 30, 2023 and 2022. Nonrecurring Fair Value Measurements From time to time, FHN may be required to measure certain other financial assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market (LOCOM) accounting or write-downs of individual assets. For assets measured at fair value on a nonrecurring basis which were still held on the Consolidated Balance Sheets at September 30, 2023, and December 31, 2022, respectively, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value. LEVEL OF VALUATION ASSUMPTIONS FOR ASSETS MEASURED AT FAIR VALUE ON A NON-RECURRING BASIS Carrying value at September 30, 2023 (Dollars in millions) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 496 $ — $ 496 Loans and leases (a) — — 223 223 OREO (b) — — 4 4 Other assets (c) — — 92 92 Carrying value at December 31, 2022 (Dollars in millions) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 506 $ — $ 506 Loans and leases (a) — — 135 135 OREO (b) — — 3 3 Other assets (c) — — 91 91 (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. For assets measured on a nonrecurring basis which were still held on the Consolidated Balance Sheets at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2023 and 2022: FAIR VALUE ADJUSTMENTS ON ASSETS MEASURED ON A NONRECURRING BASIS Net gains (losses) Net gains (losses) (Dollars in millions) 2023 2022 2023 2022 Loans held for sale—SBAs and USDA $ (1) $ (2) $ (2) $ (4) Loans and leases (a) (15) (6) (29) (7) Other assets (b) (1) (4) (5) (8) $ (17) $ (12) $ (36) $ (19) (a) Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents tax credit investments accounted for under the equity method. Lease asset impairments recognized represent the reduction in value of the right-of-use assets associated with leases that are being exited in advance of the contractual lease expiration. Impairments are measured using a discounted cash flow methodology, which is considered a Level 3 valuation. Impairments of long-lived tangible assets reflect locations where the associated land and building are either owned or leased. The fair values of owned sites were determined using estimated sales prices from appraisals and broker opinions less estimated costs to sell with adjustments upon final disposition. The fair values of owned assets in leased sites (e.g., leasehold improvements) were determined using a discounted cash flow approach, based on the revised estimated useful lives of the related assets. Both measurement methodologies are considered Level 3 valuations. Impairment adjustments recognized upon disposition of a location are considered Level 2 valuations. Fixed asset and leased asset impairments were immaterial for the three and nine months ended September 30, 2023 and 2022. Level 3 Measurements The following table provides information regarding the unobservable inputs utilized in determining the fair value of Level 3 recurring and non-recurring measurements as of September 30, 2023 and December 31, 2022: UNOBSERVABLE INPUTS USED IN LEVEL 3 FAIR VALUE MEASUREMENTS (Dollars in millions) Values Utilized Level 3 Class Fair Value at September 30, 2023 Valuation Techniques Unobservable Input Range Weighted Average (d) Trading securities - SBA interest-only strips $ 23 Discounted cash flow Constant prepayment rate 12% - 13% 13% Bond equivalent yield 18% - 19% 18% Loans held for sale - residential real estate $ 21 Discounted cash flow Prepayment speeds - First mortgage 2% - 7% 3% Foreclosure losses 64% - 73% 65% Loss severity trends - First mortgage 0% - 8% of UPB 4% Derivative liabilities, other $ 26 Discounted cash flow Visa covered litigation resolution amount $5.7 billion - $6.7 billion $6.3 billion Probability of resolution scenarios 10% - 25% 18% Time until resolution 12 - 36 months 26 months Loans and leases (a) $ 223 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) $ 4 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) $ 92 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. (Dollars in millions) Values Utilized Level 3 Class Fair Value at December 31, 2022 Valuation Techniques Unobservable Input Range Weighted Average (d) Trading securities - SBA interest-only strips $ 25 Discounted cash flow Constant prepayment rate 12% - 13% 12% Bond equivalent yield 17% 17% Loans held for sale - residential real estate $ 22 Discounted cash flow Prepayment speeds - First mortgage 2% - 8% 3% Foreclosure losses 63% - 75% 65% Loss severity trends - First mortgage 0% - 11% of UPB 5% Derivative liabilities, other $ 27 Discounted cash flow Visa covered litigation resolution amount $5.6 billion - $6.0 billion $5.9 billion Probability of resolution scenarios 5% - 25% 20% Time until resolution 12 - 42 months 28 months Loans and leases (a) $ 135 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) $ 3 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) $ 91 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. Trading Securities - SBA interest-only strips Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of SBA interest-only strips. Management additionally considers whether the loans underlying related SBA interest-only strips are delinquent, in default or prepaying, and adjusts the fair value down 20 - 100% depending on the length of time in default. Loans held for sale Foreclosure losses and prepayment rates are significant unobservable inputs used in the fair value measurement of FHN’s residential real estate loans held for sale. Loss severity trends are also assessed to evaluate the reasonableness of fair value estimates resulting from discounted cash flows methodologies as well as to estimate fair value for newly repurchased loans and loans that are near foreclosure. Significant increases (decreases) in any of these inputs in isolation would result in significantly lower (higher) fair value measurements. All observable and unobservable inputs are re-assessed quarterly. Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of unguaranteed interests in SBA loans. Unguaranteed interest in SBA loans held for sale are carried at less than the outstanding balance due to credit risk estimates. Credit risk adjustments may be reduced if prepayment is likely or as consistent payment history is realized. Management also considers other factors such as delinquency or default and adjusts the fair value accordingly. Derivative liabilities In conjunction with pre-2020 sales of Visa Class B shares, FHN and the purchasers entered into derivative transactions whereby FHN will make, or receive, cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN uses a discounted cash flow methodology in order to estimate the fair value of FHN’s derivative liabilities associated with its prior sales of Visa Class B shares. The methodology includes estimation of both the resolution amount for Visa’s Covered Litigation matters as well as the length of time until the resolution occurs. Significant increases (decreases) in either of these inputs in isolation would result in significantly higher (lower) fair value measurements for the derivative liabilities. Additionally, FHN performs a probability weighted multiple resolution scenario to calculate the estimated fair value of these derivative liabilities. Assignment of higher (lower) probabilities to the larger potential resolution scenarios would result in an increase (decrease) in the estimated fair value of the derivative liabilities. Since this estimation process requires application of judgment in developing significant unobservable inputs used to determine the possible outcomes and the probability weighting assigned to each scenario, these derivatives have been classified within Level 3 in fair value measurements disclosures. Loans and leases and Other Real Estate Owned Collateral-dependent loans and OREO are primarily valued using appraisals based on sales of comparable properties in the same or similar markets. Other collateral (receivables, inventory, equipment, etc.) is valued through borrowing base certificates, financial statements and/or auction valuations. These valuations are discounted based on the quality of reporting, knowledge of the marketability/collectability of the collateral and historical disposition rates. Other assets – tax credit investments The estimated fair value of tax credit investments accounted for under the equity method is generally determined in relation to the yield (i.e., future tax credits to be received) an acquirer of these investments would expect in relation to the yields experienced on current new issue and/or secondary market transactions. Thus, as tax credits are recognized, the future yield to a market participant is reduced, resulting in consistent impairment of the individual investments. Individual investments are reviewed for impairment quarterly, which may include the consideration of additional marketability discounts related to specific investments which typically includes consideration of the underlying property’s appraised value. Fair Value Option FHN previously elected the fair value option on a prospective basis for substantially all types of mortgage loans originated for sale purposes except for mortgage origination operations which utilize the platform acquired from CBF. FHN determined that the election reduces certain timing differences and better matches changes in the value of such loans with changes in the value of derivatives and forward delivery commitments used as economic hedges for these assets at the time of election. Repurchased loans relating to mortgage banking operations conducted prior to the IBKC merger are recognized within loans held for sale at fair value at the time of repurchase, which includes consideration of the credit status of the loans and the estimated liquidation value. FHN has elected to continue recognition of these loans at fair value in periods subsequent to reacquisition. Due to the credit-distressed nature of the vast majority of repurchased loans and the related loss severities experienced upon repurchase, FHN believes that the fair value election provides a more timely recognition of changes in value for these loans that occur subsequent to repurchase. Absent the fair value election, these loans would be subject to valuation at the LOCOM value, which would prevent subsequent values from exceeding the initial fair value, determined at the time of repurchase, but would require recognition of subsequent declines in value. Thus, the fair value election provides for a more timely recognition of any potential future recoveries in asset values while not affecting the requirement to recognize subsequent declines in value. The following table reflects the differences between the fair value carrying amount of residential real estate loans held for sale and held for investment measured at fair value in accordance with management’s election and the aggregate unpaid principal amount FHN is contractually entitled to receive at maturity. DIFFERENCES BETWEEN FAIR VALUE CARRYING AMOUNTS AND CONTRACTUAL AMOUNTS OF RESIDENTIAL REAL ESTATE LOANS REPORTED AT FAIR VALUE September 30, 2023 (Dollars in millions) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 88 $ 96 $ (8) Nonaccrual loans 2 5 (3) December 31, 2022 (Dollars in millions) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 51 $ 58 $ (7) Nonaccrual loans 5 8 (3) Loans 90 days or more past due and still accruing 1 1 — Assets and liabilities accounted for under the fair value election are initially measured at fair value with subsequent changes in fair value recognized in earnings. Such changes in the fair value of assets and liabilities for which FHN elected the fair value option are included in current period earnings with classification in the income statement line item reflected in the following table: CHANGES IN FAIR VALUE RECOGNIZED IN NET INCOME Three Months Ended Nine Months Ended (Dollars in millions) 2023 2022 2023 2022 Changes in fair value included in net income: Mortgage banking and title noninterest income Loans held for sale $ (1) $ (4) $ — $ (10) For the three and nine months ended September 30, 2023 and 2022, the amount for residential real estate loans held for sale included an insignificant amount of gains in pretax earnings that are attributable to changes in instrument-specific credit risk. The portion of the fair value adjustments related to credit risk was determined based on estimated default rates and estimated loss severities. Interest income on residential real estate loans held for sale measured at fair value is calculated based on the note rate of the loan and is recorded in the interest income section of the Consolidated Statements of Income as interest on loans held for sale. Determination of Fair Value Fair values are based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following describes the assumptions and methodologies used to estimate the fair value of financial instruments recorded at fair value in the Consolidated Balance Sheets and for estimating the fair value of financial instruments for which fair value is disclosed. Short-term financial assets Federal funds sold, securities purchased under agreements to resell, and interest-bearing deposits with other financial institutions and the Federal Reserve are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. Trading securities and trading liabilities Trading securities and trading liabilities are recognized at fair value through current earnings. Trading inventory held for broker-dealer operations is included in trading securities and trading liabilities. Broker-dealer long positions are valued at bid price in the bid-ask spread. Short positions are valued at the ask price. Inventory positions are valued using observable inputs including current market transactions, benchmark yields, credit spreads, and consensus prepayment speeds. Trading loans are valued using observable inputs including current market transactions, swap rates, mortgage rates, and consensus prepayment speeds. Trading Securities - SBA interest-only strips Interest-only strips are valued at elected fair value based on an income approach using an internal valuation model. The internal valuation model includes assumptions regarding projections of future cash flows, prepayment rates, default rates and interest-only strip terms. These securities bear the risk of loan prepayment or default that may result in FHN not recovering all or a portion of its recorded investment. When appropriate, valuations are adjusted for various factors including default or prepayment status of the underlying SBA loans. Because of the inherent uncertainty of valuation, those estimated values may be higher or lower than the values that would have been used had a ready market for the securities existed and may change in the near term. Securities available for sale and held to maturity Valuations of debt securities are performed using observable inputs obtained from market transactions in similar securities. Typical inputs include benchmark yields, consensus prepayment speeds, and credit spreads. Trades from similar securities and broker quotes are used to support these valuations. Loans held for sale FHN determines the fair value of loans held for sale using either current transaction prices or discounted cash flow models. Fair values are determined using current transaction prices and/or values on similar assets when available, including committed bids for specific loans or loan portfolios. Uncommitted bids may be adjusted based on other available market information. Fair value of residential real estate loans held for sale determined using a discounted cash flow model incorporates both observable and unobservable inputs. Inputs in the discounted cash flow model include current mortgage rates for similar products, estimated prepayment rates, foreclosure losses, and various loan performance measures (delinquency, LTV, credit score). Adjustments for delinquency and other differences in loan characteristics are typically reflected in the model’s discount rates. Loss severity trends and the value of underlying collateral are also considered in assessing the appropriate fair value for severely delinquent loans and loans in foreclosure. The valuation of HELOCs also incorporates estimated cancellation rates for loans expected to become delinquent. Non-mortgage consumer loans held for sale are valued using committed bids for specific loans or loan portfolios or current market pricing for similar assets with adjustments for differences in credit standing (delinquency, historical default rates for similar loans), yield, collateral values and prepayment rates. If pricing for similar assets is not available, a discounted cash flow methodology is utilized, which incorporates all of these factors into an estimate of investor required yield for the discount rate. FHN utilizes quoted market prices of similar instruments or broker and dealer quotations to value the SBA and USDA guaranteed loans. FHN values SBA-unguaranteed interests in loans held for sale based on individual loan characteristics, such as industry type and pay history which generally follows an income approach. Furthermore, these valuations are adjusted for changes in prepayment estimates and are reduced due to restrictions on trading. The fair value of other non-residential real estate loans held for sale is approximated by their carrying values based on current transaction values. Mortgage loans held for investment at fair value option The fair value of mortgage loans held for investment at fair value option is determined by a third party using a discounted cash flow model using various assumptions about future loan performance (constant prepayment rate, constant default rate and loss severity trends) and market discount rates. Loans held for investment The fair values of mortgage loans are estimated using an exit price methodology that is based on present values using the interest rate that would be charged for a similar loan to a borrower with similar risk, weighted for varying maturity dates and adjusted for a liquidity discount based on the estimated time period to complete a sale transaction with a market participant. Other loans and leases are valued based on present values using the interest rate that would be charged for a similar instrument to a borrower with similar risk, applicable to each category of instruments, and adjusted for a liquidity discount based on the estimated time period to complete a sale transaction with a market participant. For loans measured using the estimated fair value of collateral less costs to sell, fair value is estimated using appraisals of the collateral. Collateral values are monitored and additional write-downs are recognized if it is determined that the estimated collateral values have declined further. Estimated costs to sell are based on current amounts of disposal costs for similar assets. Carrying value is considered to reflect fair value for these loans. Derivative assets and liabilities The fair value for forwards and futures contracts is based on current transactions involving identical securities. Futures contracts are exchange-traded and thus have no credit risk factor assigned as the risk of non-performance is limited to the clearinghouse used. Valuations of other derivatives (primarily interest rate contracts) are based on inputs observed in active markets for similar instruments. Typical inputs include benchmark yields, option volatility and option skew. Centrally cleared derivatives are discounted using SOFR as required by clearinghouses. In measuring the fair value of these derivative assets and liabilities, FHN has elected to consider credit risk based on the net exposure to individual counterparties. Credit risk is mitigated for these instruments through the use of mutual margining and master netting agreements as well as collateral posting requirements. For derivative contracts with daily cash margin requirements that are considered settlements, the daily margin amount is netted within derivative assets or liabilities. Any remaining credit risk related to interest rate derivatives is considered in determining fair value through evaluation of additional factors such as client loan grades and debt ratings. Foreign currency related derivatives also utilize observable exchange rates in the determination of fair value. The determination of fair value for FHN’s derivative liabilities associated with its prior sales of Visa Class B shares are classified within Level 3 in the fair value measurements disclosure as previously discussed in the unobservable inputs discussion. The fair value of risk participations is determined in reference to the fair value of the related derivative contract between the borrower and the lead bank in the participation structure, which is determined consistent with the valuation process discussed above. This value is adjusted for the pro rata portion of the reference derivative’s notional value and an assessment of credit risk for the referenced borrower. OREO OREO primarily consists of properties that have been acquired in satisfaction of debt. These properties are carried at the lower of the outstanding loan amount or estimated fair value less estimated costs to sell the real estate. Estimated fair value is determined using appraised values with subsequent adjustments for deterioration in values that are not reflected in the most recent appraisal. Other assets For disclosure purposes, other assets consist of tax credit inve

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 137	$ 265	$ 713	$ 634

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	9 Months Ended
Basis of Presentation and Accounting Policies (Policies)	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Accounting	The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all information and notes necessary for complete financial statements in accordance with GAAP. In the opinion of management, the accompanying unaudited consolidated financial statements contain all significant adjustments, consisting of normal and recurring items, considered necessary for fair presentation. These interim financial statements should be read in conjunction with FHN's audited consolidated financial statements and notes in FHN's Annual Report on Form 10-K for the year ended December 31, 2022. Operating results for the interim period are not necessarily indicative of the results that may be expected for the full year. All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts reported in prior years have been reclassified to conform to the current period presentation. See the Glossary of Acronyms and Terms included in this Report for terms used herein.
Accounting Changes With Extended Transition Periods and Accounting Changes Issued But Not Currently Effective	Accounting Changes With Extended Transition Periods In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting” which provides several optional expedients and exceptions to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The provisions of ASU 2020-04 primarily affect 1) contract modifications (e.g., loans, leases, debt, and derivatives) made in anticipation that a reference rate (e.g., LIBOR) will be discontinued and 2) the application of hedge accounting for existing relationships affected by those modifications. The provisions of ASU 2020-04 were effective upon release and apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. Including the adoption of ASU 2022-06 (discussed below), the expedients and exceptions provided by ASU 2020-04 do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2024, except for hedging relationships existing as of December 31, 2024, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. FHN identified contracts affected by reference rate reform, developed modification plans for those contracts and implemented those modifications before the last quotation of LIBOR on June 30, 2023. FHN elected to utilize the optional expedients and exceptions provided by ASU 2020-04 for contract modifications that immediately converted the reference rate within each contract. FHN also elected that revisions to contractual fallback provisions, including modifications in accordance with the provisions of Regulation ZZ, did not require evaluation for modification accounting. Additionally, FHN elected that the revisions to derivative contracts implemented by central clearinghouses to convert centrally cleared derivative contracts from LIBOR to SOFR plus an appropriate spread adjustment were not considered changes requiring assessment for modification accounting. During the transition period, for cash flow hedges that reference 1-Month USD LIBOR, FHN applied expedients related to 1) the assumption of probability of cash flows when reference rates are changed on hedged items 2) avoiding dedesignation when critical terms (i.e., reference rates) change and 3) the allowed assumption of shared risk exposure for hedged items. Additionally, for its cash flow hedges that reference 1-Month Term SOFR, FHN applied expedients related to 1) the allowed assumption of shared risk exposure for hedged items and 2) multiple allowed assumptions of conformity between hedged items and the hedging instrument when assessing effectiveness. FHN continued to utilize these expedients and exceptions through the final cash flows affected by the quotation of LIBOR. In accordance with the provisions of ASU 2020-04, effective immediately after the end of the transition period for its cash flow hedges (i.e., no more cash flows were affected by LIBOR), FHN elected that the cessation of effectiveness assessments under the transition guidance and subsequent initiation of hedge effectiveness assessments under ASC 815 did not require dedesignation of the hedge relationships. In December 2022, the FASB issued ASU 2022-06, "Deferral of the Sunset Date of Topic 848" which extends the transition window for ASU 2020-04 from December 31, 2022 to December 31, 2024, consistent with key USD LIBOR tenors continuing to be published through June 30, 2023. In January 2021, the FASB issued ASU 2021-01, "Scope" to expand the scope of ASU 2020-04 to apply to certain contract modifications that were implemented in October 2020 by derivative clearinghouses for the use of the Secured Overnight Funding Rate (SOFR) in discounting, margining and price alignment for centrally cleared derivatives, including derivatives utilized in hedging relationships. ASU 2021-01 also applies to derivative contracts affected by the change in discounting convention regardless of whether they are centrally cleared (i.e., bi-lateral contracts can also be modified) and regardless of whether they reference LIBOR. ASU 2021-01 was effective immediately upon issuance with retroactive application permitted. FHN elected to retroactively apply the provisions of ASU 2021-01 because FHN's centrally cleared derivatives were affected by the change in discounting convention and because FHN has other bi-lateral derivative contracts that may be modified to conform to the use of SOFR for discounting. Adoption did not have a significant effect on FHN's reported financial condition or results of operations. Summary of Accounting Changes ASU 2022-01 In March 2022, the FASB issued ASU 2022-01, "Fair Value Hedging - Portfolio Layer Method", which will expand FHN's ability to hedge the benchmark interest rate risk of portfolios of financial interests (or beneficial interests) in a fair value hedge. The provisions of ASU 2022-01 also permit FHN to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets, namely by expanding the use of the "portfolio layer" method to non-prepayable financial assets. ASU 2022-01 also permits multiple hedged layers to be designated as a single closed portfolio to achieve hedge accounting. Additionally, the ASU requires that basis adjustments must be maintained on the closed portfolio of assets as a whole, and not allocated to individual assets for active portfolio layer method hedges. ASU 2022-01 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. FHN may utilize the provisions of ASU 2022-01 in its future hedging strategies. ASU 2022-02 In March 2022, the FASB issued ASU 2022-02, “Troubled Debt Restructurings and Vintage Disclosures” that eliminates current TDR recognition and measurement guidance and instead requires the Company to evaluate whether the modification represents a new loan or a continuation of an existing loan (which is consistent with the accounting for other loan modifications). The provisions of ASU 2022-02 also enhance existing disclosure requirements and introduces new disclosures related to certain modifications made to borrowers experiencing financial difficulty. The provisions of this ASU also require FHN to disclose current period gross write-offs of loans and leases by year of origination. ASU 2022-02 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. For the transition method related to the recognition and measurement of TDRs, FHN elected to apply the modified retrospective transition effective January 1, 2023, resulting in a cumulative-effect reduction in ALLL of $6 million and an increase to retained earnings of $4 million, net of tax. The disclosure provisions of ASU 2022-02 are applied prospectively and presented in Note 3 – Loans and Leases and Note 4 – Allowance for Credit Losses. Accounting Changes Issued But Not Currently Effective ASU 2023-02 In March 2023, the FASB issued ASU 2023-02, “Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method” which permits investors to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. The proportional amortization method results in the cost of the investment being amortized in proportion to the income tax credits and other income tax benefits received, with the amortization of the investment and the income tax credits being presented net in the income statement as a component of income tax provision (benefit). Prior to ASU 2023-02, the proportional amortization method was only available to qualifying low income housing equity investments. An investor is required to make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis. An investor that applies the proportional amortization method to qualifying tax equity investments must account for the receipt of the investment tax credits using the flow-through method, even if the entity applies the deferral method for other investment tax credits received. ASU 2023-02 also requires specific disclosures that must be applied to all investments that generate income tax credits and other income tax benefits from a tax credit program for which the entity has elected to apply the proportional amortization method. ASU 2023-02 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for all entities in any interim period. If ASU 2023-02 is adopted in an interim period, it must be adopted as of the beginning of the fiscal year that includes that interim period. Adoption of ASU 2023-02 is applied on either a modified retrospective (cumulative catch up) or a retrospective (representment of prior years) basis. FHN is assessing 1) the applicability of ASU 2023-02 to its tax credit investments and 2) whether to elect the proportional amortization method for qualifying investments.
Determination of Fair Value	FHN groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. This hierarchy requires FHN to maximize the use of observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. Each fair value measurement is placed into the proper level based on the lowest level of significant input. These levels are: • Level 1 —Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2 —Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 —Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models, and similar techniques. Trading Securities - SBA interest-only strips Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of SBA interest-only strips. Management additionally considers whether the loans underlying related SBA interest-only strips are delinquent, in default or prepaying, and adjusts the fair value down 20 - 100% depending on the length of time in default. Loans held for sale Foreclosure losses and prepayment rates are significant unobservable inputs used in the fair value measurement of FHN’s residential real estate loans held for sale. Loss severity trends are also assessed to evaluate the reasonableness of fair value estimates resulting from discounted cash flows methodologies as well as to estimate fair value for newly repurchased loans and loans that are near foreclosure. Significant increases (decreases) in any of these inputs in isolation would result in significantly lower (higher) fair value measurements. All observable and unobservable inputs are re-assessed quarterly. Increases (decreases) in estimated prepayment rates and bond equivalent yields negatively (positively) affect the value of unguaranteed interests in SBA loans. Unguaranteed interest in SBA loans held for sale are carried at less than the outstanding balance due to credit risk estimates. Credit risk adjustments may be reduced if prepayment is likely or as consistent payment history is realized. Management also considers other factors such as delinquency or default and adjusts the fair value accordingly. Derivative liabilities In conjunction with pre-2020 sales of Visa Class B shares, FHN and the purchasers entered into derivative transactions whereby FHN will make, or receive, cash payments whenever the conversion ratio of the Visa Class B shares into Visa Class A shares is adjusted. FHN uses a discounted cash flow methodology in order to estimate the fair value of FHN’s derivative liabilities associated with its prior sales of Visa Class B shares. The methodology includes estimation of both the resolution amount for Visa’s Covered Litigation matters as well as the length of time until the resolution occurs. Significant increases (decreases) in either of these inputs in isolation would result in significantly higher (lower) fair value measurements for the derivative liabilities. Additionally, FHN performs a probability weighted multiple resolution scenario to calculate the estimated fair value of these derivative liabilities. Assignment of higher (lower) probabilities to the larger potential resolution scenarios would result in an increase (decrease) in the estimated fair value of the derivative liabilities. Since this estimation process requires application of judgment in developing significant unobservable inputs used to determine the possible outcomes and the probability weighting assigned to each scenario, these derivatives have been classified within Level 3 in fair value measurements disclosures. Loans and leases and Other Real Estate Owned Collateral-dependent loans and OREO are primarily valued using appraisals based on sales of comparable properties in the same or similar markets. Other collateral (receivables, inventory, equipment, etc.) is valued through borrowing base certificates, financial statements and/or auction valuations. These valuations are discounted based on the quality of reporting, knowledge of the marketability/collectability of the collateral and historical disposition rates. Other assets – tax credit investments The estimated fair value of tax credit investments accounted for under the equity method is generally determined in relation to the yield (i.e., future tax credits to be received) an acquirer of these investments would expect in relation to the yields experienced on current new issue and/or secondary market transactions. Thus, as tax credits are recognized, the future yield to a market participant is reduced, resulting in consistent impairment of the individual investments. Individual investments are reviewed for impairment quarterly, which may include the consideration of additional marketability discounts related to specific investments which typically includes consideration of the underlying property’s appraised value. Fair Value Option FHN previously elected the fair value option on a prospective basis for substantially all types of mortgage loans originated for sale purposes except for mortgage origination operations which utilize the platform acquired from CBF. FHN determined that the election reduces certain timing differences and better matches changes in the value of such loans with changes in the value of derivatives and forward delivery commitments used as economic hedges for these assets at the time of election. Repurchased loans relating to mortgage banking operations conducted prior to the IBKC merger are recognized within loans held for sale at fair value at the time of repurchase, which includes consideration of the credit status of the loans and the estimated liquidation value. FHN has elected to continue recognition of these loans at fair value in periods subsequent to reacquisition. Due to the credit-distressed nature of the vast majority of repurchased loans and the related loss severities experienced upon repurchase, FHN believes that the fair value election provides a more timely recognition of changes in value for these loans that occur subsequent to repurchase. Absent the fair value election, these loans would be subject to valuation at the LOCOM value, which would prevent subsequent values from exceeding the initial fair value, determined at the time of repurchase, but would require recognition of subsequent declines in value. Thus, the fair value election provides for a more timely recognition of any potential future recoveries in asset values while not affecting the requirement to recognize subsequent declines in value. Determination of Fair Value Fair values are based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The following describes the assumptions and methodologies used to estimate the fair value of financial instruments recorded at fair value in the Consolidated Balance Sheets and for estimating the fair value of financial instruments for which fair value is disclosed. Short-term financial assets Federal funds sold, securities purchased under agreements to resell, and interest-bearing deposits with other financial institutions and the Federal Reserve are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. Trading securities and trading liabilities Trading securities and trading liabilities are recognized at fair value through current earnings. Trading inventory held for broker-dealer operations is included in trading securities and trading liabilities. Broker-dealer long positions are valued at bid price in the bid-ask spread. Short positions are valued at the ask price. Inventory positions are valued using observable inputs including current market transactions, benchmark yields, credit spreads, and consensus prepayment speeds. Trading loans are valued using observable inputs including current market transactions, swap rates, mortgage rates, and consensus prepayment speeds. Trading Securities - SBA interest-only strips Interest-only strips are valued at elected fair value based on an income approach using an internal valuation model. The internal valuation model includes assumptions regarding projections of future cash flows, prepayment rates, default rates and interest-only strip terms. These securities bear the risk of loan prepayment or default that may result in FHN not recovering all or a portion of its recorded investment. When appropriate, valuations are adjusted for various factors including default or prepayment status of the underlying SBA loans. Because of the inherent uncertainty of valuation, those estimated values may be higher or lower than the values that would have been used had a ready market for the securities existed and may change in the near term. Securities available for sale and held to maturity Valuations of debt securities are performed using observable inputs obtained from market transactions in similar securities. Typical inputs include benchmark yields, consensus prepayment speeds, and credit spreads. Trades from similar securities and broker quotes are used to support these valuations. Loans held for sale FHN determines the fair value of loans held for sale using either current transaction prices or discounted cash flow models. Fair values are determined using current transaction prices and/or values on similar assets when available, including committed bids for specific loans or loan portfolios. Uncommitted bids may be adjusted based on other available market information. Fair value of residential real estate loans held for sale determined using a discounted cash flow model incorporates both observable and unobservable inputs. Inputs in the discounted cash flow model include current mortgage rates for similar products, estimated prepayment rates, foreclosure losses, and various loan performance measures (delinquency, LTV, credit score). Adjustments for delinquency and other differences in loan characteristics are typically reflected in the model’s discount rates. Loss severity trends and the value of underlying collateral are also considered in assessing the appropriate fair value for severely delinquent loans and loans in foreclosure. The valuation of HELOCs also incorporates estimated cancellation rates for loans expected to become delinquent. Non-mortgage consumer loans held for sale are valued using committed bids for specific loans or loan portfolios or current market pricing for similar assets with adjustments for differences in credit standing (delinquency, historical default rates for similar loans), yield, collateral values and prepayment rates. If pricing for similar assets is not available, a discounted cash flow methodology is utilized, which incorporates all of these factors into an estimate of investor required yield for the discount rate. FHN utilizes quoted market prices of similar instruments or broker and dealer quotations to value the SBA and USDA guaranteed loans. FHN values SBA-unguaranteed interests in loans held for sale based on individual loan characteristics, such as industry type and pay history which generally follows an income approach. Furthermore, these valuations are adjusted for changes in prepayment estimates and are reduced due to restrictions on trading. The fair value of other non-residential real estate loans held for sale is approximated by their carrying values based on current transaction values. Mortgage loans held for investment at fair value option The fair value of mortgage loans held for investment at fair value option is determined by a third party using a discounted cash flow model using various assumptions about future loan performance (constant prepayment rate, constant default rate and loss severity trends) and market discount rates. Loans held for investment The fair values of mortgage loans are estimated using an exit price methodology that is based on present values using the interest rate that would be charged for a similar loan to a borrower with similar risk, weighted for varying maturity dates and adjusted for a liquidity discount based on the estimated time period to complete a sale transaction with a market participant. Other loans and leases are valued based on present values using the interest rate that would be charged for a similar instrument to a borrower with similar risk, applicable to each category of instruments, and adjusted for a liquidity discount based on the estimated time period to complete a sale transaction with a market participant. For loans measured using the estimated fair value of collateral less costs to sell, fair value is estimated using appraisals of the collateral. Collateral values are monitored and additional write-downs are recognized if it is determined that the estimated collateral values have declined further. Estimated costs to sell are based on current amounts of disposal costs for similar assets. Carrying value is considered to reflect fair value for these loans. Derivative assets and liabilities The fair value for forwards and futures contracts is based on current transactions involving identical securities. Futures contracts are exchange-traded and thus have no credit risk factor assigned as the risk of non-performance is limited to the clearinghouse used. Valuations of other derivatives (primarily interest rate contracts) are based on inputs observed in active markets for similar instruments. Typical inputs include benchmark yields, option volatility and option skew. Centrally cleared derivatives are discounted using SOFR as required by clearinghouses. In measuring the fair value of these derivative assets and liabilities, FHN has elected to consider credit risk based on the net exposure to individual counterparties. Credit risk is mitigated for these instruments through the use of mutual margining and master netting agreements as well as collateral posting requirements. For derivative contracts with daily cash margin requirements that are considered settlements, the daily margin amount is netted within derivative assets or liabilities. Any remaining credit risk related to interest rate derivatives is considered in determining fair value through evaluation of additional factors such as client loan grades and debt ratings. Foreign currency related derivatives also utilize observable exchange rates in the determination of fair value. The determination of fair value for FHN’s derivative liabilities associated with its prior sales of Visa Class B shares are classified within Level 3 in the fair value measurements disclosure as previously discussed in the unobservable inputs discussion. The fair value of risk participations is determined in reference to the fair value of the related derivative contract between the borrower and the lead bank in the participation structure, which is determined consistent with the valuation process discussed above. This value is adjusted for the pro rata portion of the reference derivative’s notional value and an assessment of credit risk for the referenced borrower. OREO OREO primarily consists of properties that have been acquired in satisfaction of debt. These properties are carried at the lower of the outstanding loan amount or estimated fair value less estimated costs to sell the real estate. Estimated fair value is determined using appraised values with subsequent adjustments for deterioration in values that are not reflected in the most recent appraisal. Other assets For disclosure purposes, other assets consist of tax credit investments, FRB and FHLB Stock, deferred compensation mutual funds and equity investments (including other mutual funds) with readily determinable fair values. Tax credit investments accounted for under the equity method are written down to estimated fair value quarterly based on the estimated value of the associated tax credits which incorporates estimates of required yield for hypothetical investors. The fair value of all other tax credit investments is estimated using recent transaction information with adjustments for differences in individual investments. Deferred compensation mutual funds are recognized at fair value, which is based on quoted prices in active markets. Investments in the stock of the Federal Reserve Bank and Federal Home Loan Banks are recognized at historical cost in the Consolidated Balance Sheets which is considered to approximate fair value. Investments in mutual funds are measured at the funds’ reported closing net asset values. Investments in equity securities are valued using quoted market prices when available. Defined maturity deposits The fair value of these deposits is estimated by discounting future cash flows to their present value. Future cash flows are discounted by using the current market rates of similar instruments applicable to the remaining maturity. For disclosure purposes, defined maturity deposits include all time deposits. Short-term financial liabilities The fair value of federal funds purchased, securities sold under agreements to repurchase, and other short-term borrowings are approximated by the book value. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. Loan commitments Fair values of these commitments are based on fees charged to enter into similar agreements taking into account the remaining terms of the agreements and the counterparties’ credit standing. Other commitments Fair values of these commitments are based on fees charged to enter into similar agreements. The following fair value estimates are determined as of a specific point in time utilizing various assumptions and estimates. The use of assumptions and various valuation techniques, as well as the absence of secondary markets for certain financial instruments, reduces the comparability of fair value disclosures between financial institutions. Due to market illiquidity, the fair values for loans and leases, loans held for sale, and term borrowings as of September 30, 2023 and December 31, 2022, involve the use of significant internally-developed pricing assumptions for certain components of these line items. The assumptions and valuations utilized for this disclosure are considered to reflect inputs that market participants would use in transactions involving these instruments as of the measurement date. The valuations of legacy assets, particularly consumer loans and TRUPS loans within the Corporate segment, are influenced by changes in economic conditions since origination and risk perceptions of the financial sector. These considerations affect the estimate of a potential acquirer’s cost of capital and cash flow volatility assumptions from these assets and the resulting fair value measurements may depart significantly from FHN’s internal estimates of the intrinsic value of these assets. Assets and liabilities that are not financial instruments have not been included in the following table such as the value of long-term relationships with deposit and trust clients, premises and equipment, goodwill and other

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
Investment Securities (Tables)	Sep. 30, 2023
Marketable Securities [Abstract]
Schedule of FHN's Investment Securities	The following tables summarize FHN’s investment securities as of September 30, 2023 and December 31, 2022: INVESTMENT SECURITIES AT SEPTEMBER 30, 2023 September 30, 2023 (Dollars in millions) Amortized Gross Gross Fair Securities available for sale: Government agency issued MBS $ 5,156 $ — $ (831) $ 4,325 Government agency issued CMO 2,528 — (428) 2,100 Other U.S. government agencies 1,334 — (206) 1,128 States and municipalities 630 — (83) 547 Total securities available for sale (a) $ 9,648 $ — $ (1,548) $ 8,100 Securities held to maturity: Government agency issued MBS $ 863 $ — $ (143) $ 720 Government agency issued CMO 472 — (88) 384 Total securities held to maturity $ 1,335 $ — $ (231) $ 1,104 (a) Includes $8.4 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes. INVESTMENT SECURITIES AT DECEMBER 31, 2022 December 31, 2022 (Dollars in millions) Amortized Gross Gross Fair Securities available for sale: Government agency issued MBS $ 5,457 $ 1 $ (695) $ 4,763 Government agency issued CMO 2,682 — (369) 2,313 Other U.S. government agencies 1,325 — (162) 1,163 States and municipalities 658 1 (62) 597 Total securities available for sale (a) $ 10,122 $ 2 $ (1,288) $ 8,836 Securities held to maturity: Government agency issued MBS $ 897 $ — $ (109) $ 788 Government agency issued CMO 474 — (53) 421 Total securities held to maturity $ 1,371 $ — $ (162) $ 1,209 (a) Includes $6.5 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
Schedule of Amortized Cost And Fair Value By Contractual Maturity	The amortized cost and fair value by contractual maturity for the debt securities portfolio as of September 30, 2023 is provided below: DEBT SECURITIES PORTFOLIO MATURITIES Held to Maturity Available for Sale (Dollars in millions) Amortized Fair Amortized Fair Within 1 year $ — $ — $ 14 $ 14 After 1 year through 5 years — — 125 118 After 5 years through 10 years — — 394 341 After 10 years — — 1,431 1,202 Subtotal — — 1,964 1,675 Government agency issued MBS and CMO (a) 1,335 1,104 7,684 6,425 Total $ 1,335 $ 1,104 $ 9,648 $ 8,100 (a) Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
Schedule of Investments Within The Available For Sale Portfolio That Had Unrealized Losses	The following tables provide information on investments within the available-for-sale portfolio that had unrealized losses as of September 30, 2023 and December 31, 2022: AFS INVESTMENT SECURITIES WITH UNREALIZED LOSSES As of September 30, 2023 Less than 12 months 12 months or longer Total (Dollars in millions) Fair Unrealized Fair Unrealized Fair Unrealized Government agency issued MBS $ 258 $ (14) $ 4,066 $ (817) $ 4,324 $ (831) Government agency issued CMO 53 (4) 2,047 (424) 2,100 (428) Other U.S. government agencies 256 (12) 871 (194) 1,127 (206) States and municipalities 97 (6) 439 (77) 536 (83) Total $ 664 $ (36) $ 7,423 $ (1,512) $ 8,087 $ (1,548) As of December 31, 2022 Less than 12 months 12 months or longer Total (Dollars in millions) Fair Unrealized Fair Unrealized Fair Unrealized Government agency issued MBS $ 2,314 $ (249) $ 2,350 $ (446) $ 4,664 $ (695) Government agency issued CMO 1,104 (123) 1,209 (246) 2,313 (369) Other U.S. government agencies 643 (67) 424 (95) 1,067 (162) States and municipalities 493 (48) 54 (14) 547 (62) Total $ 4,554 $ (487) $ 4,037 $ (801) $ 8,591 $ (1,288)

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
Loans and Leases (Tables)	Sep. 30, 2023
Receivables [Abstract]
Schedule Of Loans By Portfolio Segment	The following table provides the amortized cost basis of loans and leases by portfolio segment and class as of September 30, 2023 and December 31, 2022, excluding accrued interest of $276 million and $226 million, respectively, which is included in other assets in the Consolidated Balance Sheets. LOANS AND LEASES BY PORTFOLIO SEGMENT (Dollars in millions) September 30, 2023 December 31, 2022 Commercial: Commercial and industrial (a) (b) $ 30,926 $ 29,523 Loans to mortgage companies 2,237 2,258 Total commercial, financial, and industrial 33,163 31,781 Commercial real estate 14,121 13,228 Consumer: HELOC 2,248 2,028 Real estate installment loans 11,437 10,225 Total consumer real estate 13,685 12,253 Credit card and other (c) 809 840 Loans and leases $ 61,778 $ 58,102 Allowance for loan and lease losses (760) (685) Net loans and leases $ 61,018 $ 57,417 (a) Includes equipment financing leases of $1.2 billion and $1.1 billion for September 30, 2023 and December 31, 2022, respectively. (b) Includes PPP loans fully guaranteed by the SBA of $35 million and $76 million as of September 30, 2023 and December 31, 2022, respectively. (c) Includes $187 million and $193 million of commercial credit card balances as of September 30, 2023 and December 31, 2022, respectively.
Financing Receivable Credit Quality Indicators	The following tables provide the amortized cost basis of the commercial loan portfolio by year of origination and credit quality indicator as of September 30, 2023 and December 31, 2022: C&I PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (b) $ 3,351 $ 5,945 $ 3,796 $ 1,710 $ 1,772 $ 3,634 $ 2,237 $ 9,302 $ 358 $ 32,105 Special Mention (PD grade 13) 1 31 54 53 100 60 — 139 1 439 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) — 123 62 49 39 96 — 147 103 619 Total C&I loans $ 3,352 $ 6,099 $ 3,912 $ 1,812 $ 1,911 $ 3,790 $ 2,237 $ 9,588 $ 462 $ 33,163 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 LMC (a) Revolving Revolving Total Credit Quality Indicator: Pass (PD grades 1 through 12) (b) $ 7,456 $ 3,634 $ 1,803 $ 1,912 $ 1,112 $ 3,170 $ 2,258 $ 9,166 $ 371 $ 30,882 Special Mention (PD grade 13) 17 56 17 125 8 80 — 126 — 429 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 36 48 41 34 25 55 — 134 97 470 Total C&I loans $ 7,509 $ 3,738 $ 1,861 $ 2,071 $ 1,145 $ 3,305 $ 2,258 $ 9,426 $ 468 $ 31,781 (a) LMC includes non-revolving commercial lines of credit to qualified mortgage companies primarily for the temporary warehousing of eligible mortgage loans prior to the borrower's sale of those mortgage loans to third-party investors. The loans are of short duration with maturities less than one year. (b) Balances include PPP loans. CRE PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Loans Converted to Term Loans Total Credit Quality Indicator: Pass (PD grades 1 through 12) $ 663 $ 3,355 $ 3,643 $ 1,306 $ 1,331 $ 2,978 $ 316 $ 19 $ 13,611 Special Mention (PD grade 13) 1 1 3 30 147 77 — — 259 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) — 2 5 11 141 84 8 — 251 Total CRE loans $ 664 $ 3,358 $ 3,651 $ 1,347 $ 1,619 $ 3,139 $ 324 $ 19 $ 14,121 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total Credit Quality Indicator: Pass (PD grades 1 through 12) $ 2,637 $ 3,324 $ 1,488 $ 1,855 $ 808 $ 2,565 $ 274 $ 20 $ 12,971 Special Mention (PD grade 13) — 3 3 37 68 5 1 — 117 Substandard, Doubtful, or Loss (PD grades 14,15, and 16) 1 4 12 50 31 31 11 — 140 Total CRE loans $ 2,638 $ 3,331 $ 1,503 $ 1,942 $ 907 $ 2,601 $ 286 $ 20 $ 13,228 CONSUMER REAL ESTATE PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Total FICO score 740 or greater $ 1,425 $ 2,110 $ 1,750 $ 748 $ 475 $ 1,398 $ 1,542 $ 53 $ 9,501 FICO score 720-739 180 287 230 110 90 239 189 16 1,341 FICO score 700-719 132 234 195 87 52 230 157 18 1,105 FICO score 660-699 162 200 119 83 53 303 175 19 1,114 FICO score 620-659 9 20 23 24 37 112 37 7 269 FICO score less than 620 12 17 19 20 12 240 23 12 355 Total $ 1,920 $ 2,868 $ 2,336 $ 1,072 $ 719 $ 2,522 $ 2,123 $ 125 $ 13,685 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total FICO score 740 or greater $ 2,154 $ 1,847 $ 819 $ 523 $ 278 $ 1,294 $ 1,297 $ 63 $ 8,275 FICO score 720-739 292 246 116 98 34 238 183 18 1,225 FICO score 700-719 242 206 93 55 35 226 142 22 1,021 FICO score 660-699 214 137 90 55 62 278 192 23 1,051 FICO score 620-659 21 24 25 41 20 105 47 9 292 FICO score less than 620 15 19 32 12 23 256 16 16 389 Total $ 2,938 $ 2,479 $ 1,175 $ 784 $ 452 $ 2,397 $ 1,877 $ 151 $ 12,253 The following tables reflect the amortized cost basis by year of origination and refreshed FICO scores for credit card and other loans as of September 30, 2023 and December 31, 2022. CREDIT CARD & OTHER PORTFOLIO September 30, 2023 (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Revolving Total FICO score 740 or greater $ 43 $ 29 $ 13 $ 6 $ 4 $ 34 $ 223 $ 5 $ 357 FICO score 720-739 5 3 2 1 1 5 27 1 45 FICO score 700-719 4 3 4 1 1 5 23 3 44 FICO score 660-699 2 3 1 1 1 8 19 1 36 FICO score 620-659 1 1 1 — — 3 6 — 12 FICO score less than 620 9 9 6 8 13 107 162 1 315 Total $ 64 $ 48 $ 27 $ 17 $ 20 $ 162 $ 460 $ 11 $ 809 December 31, 2022 (Dollars in millions) 2022 2021 2020 2019 2018 Prior to 2018 Revolving Revolving Loans Converted to Term Loans Total FICO score 740 or greater $ 36 $ 14 $ 10 $ 10 $ 4 $ 25 $ 291 $ 6 $ 396 FICO score 720-739 3 2 2 1 — 4 30 1 43 FICO score 700-719 3 3 1 1 — 4 33 1 46 FICO score 660-699 3 2 1 1 2 7 30 1 47 FICO score 620-659 1 3 1 — — 3 18 — 26 FICO score less than 620 7 6 6 10 7 71 174 1 282 Total $ 53 $ 30 $ 21 $ 23 $ 13 $ 114 $ 576 $ 10 $ 840
Schedule of Accruing And Non-Accruing Loans By Class	The following table reflects accruing and non-accruing loans and leases by class on September 30, 2023 and December 31, 2022: ACCRUING & NON-ACCRUING LOANS AND LEASES September 30, 2023 Accruing Non-Accruing (Dollars in millions) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 30,772 $ 28 $ 3 $ 30,803 $ 78 $ 2 $ 43 $ 123 $ 30,926 Loans to mortgage companies 2,237 — — 2,237 — — — — 2,237 Total commercial, financial, and industrial 33,009 28 3 33,040 78 2 43 123 33,163 Commercial real estate: CRE (b) 13,992 4 — 13,996 43 50 32 125 14,121 Consumer real estate: HELOC (c) 2,185 13 5 2,203 32 4 9 45 2,248 Real estate installment loans (d) 11,307 25 6 11,338 47 8 44 99 11,437 Total consumer real estate 13,492 38 11 13,541 79 12 53 144 13,685 Credit card and other: Credit card 274 4 3 281 — — — — 281 Other 525 1 — 526 2 — — 2 528 Total credit card and other 799 5 3 807 2 — — 2 809 Total loans and leases $ 61,292 $ 75 $ 17 $ 61,384 $ 202 $ 64 $ 128 $ 394 $ 61,778 December 31, 2022 Accruing Non-Accruing (Dollars in millions) Current 30-89 90+ Total Current 30-89 90+ Total Total Commercial, financial, and industrial: C&I (a) $ 29,309 $ 50 $ 11 $ 29,370 $ 64 $ 10 $ 79 $ 153 $ 29,523 Loans to mortgage companies 2,258 — — 2,258 — — — — 2,258 Total commercial, financial, and industrial 31,567 50 11 31,628 64 10 79 153 31,781 Commercial real estate: CRE (b) 13,208 11 — 13,219 7 — 2 9 13,228 Consumer real estate: HELOC (c) 1,967 12 5 1,984 32 4 8 44 2,028 Real estate installment loans (d) 10,079 25 13 10,117 56 5 47 108 10,225 Total consumer real estate 12,046 37 18 12,101 88 9 55 152 12,253 Credit card and other: Credit card 287 5 4 296 — — — — 296 Other 540 2 — 542 1 — 1 2 544 Total credit card and other 827 7 4 838 1 — 1 2 840 Total loans and leases $ 57,648 $ 105 $ 33 $ 57,786 $ 160 $ 19 $ 137 $ 316 $ 58,102 (a) $108 million and $147 million of C&I loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively. (b) $117 million and $5 million of CRE loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively. (c) $5 million of HELOC loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in both 2023 and 2022. (d) $10 million and $7 million of real estate installment loans are nonaccrual loans that have been specifically reviewed for impairment with no related allowance in 2023 and 2022, respectively.
Financing Receivable, Modified	The following tables present the amortized cost basis at the end of the reporting period of loans modified to borrowers experiencing financial difficulty, disaggregated by class of financing receivable and type of modification made, as well as the financial effect of the modifications made as of September 30, 2023: LOAN MODIFICATIONS TO BORROWERS EXPERIENCING FINANCIAL DIFFICULTY September 30, 2023 Interest Rate Reduction (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 1 — Reduced weighted-average contractual interest rate from 8.60% to 5.00% Credit Card and Other (a) — — Reduced weighted-average contractual interest rate from 13.30% to 0.00% Total $ 1 — % (a) Balance less than $1 million. September 30, 2023 Term Extension (Dollars in millions) Balance % of Total Class Financial Effect C&I $ 81 0.2 % Added an estimated weighted-average 1 year to the life of loans, which reduced monthly payment amounts for the borrowers CRE 42 0.3 Added an estimated weighted-average 1 year to the life of loans, which reduced monthly payment amounts for the borrowers Consumer Real Estate 2 — Added a weighted-average 10 years to the life of loans, which reduced monthly payment amounts for the borrowers Credit Card and Other — — N/A Total $ 125 0.2 % September 30, 2023 Principal Forgiveness (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 1 — $1.3 million of the principal of consumer loans was legally discharged in bankruptcy during the period and the borrowers have not re-affirmed the debt as of period end. Credit Card and Other — — N/A Total $ 1 — % September 30, 2023 Payment Deferrals (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 3 — Payment deferral for 11 months, with a balloon payment at the end of the term Credit Card and Other — — N/A Total $ 3 — % September 30, 2023 Combination - Term Extension and Interest Rate Reduction (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE — — N/A Consumer Real Estate 5 — Added a weighted-average 13.5 years to the life of loans and reduced weighted-average contractual interest rate from 5.60% to 4.80% Credit Card and Other — — N/A Total $ 5 — % September 30, 2023 Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness (Dollars in millions) Balance % of Total Class Financial Effect C&I $ 2 — % Added a weighted-average 3.7 years to the life of loans, reduced weighted-average contractual interest rate from 11.25% to 7.50% and provided less than $1 million in interest forgiveness CRE — — N/A Consumer Real Estate — — N/A Credit Card and Other — — N/A Total $ 2 — % September 30, 2023 Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals (Dollars in millions) Balance % of Total Class Financial Effect C&I $ — — % N/A CRE 16 0.1 Added a weighted-average 1 year to the life of loans, reduced weighted-average contractual interest rate from 8.65% to 8.00% and provided less than $1 million in deferred interest Consumer Real Estate — — N/A Credit Card and Other — — N/A Total $ 16 — %
Schedule of Financing Receivable, Performance of Modified Loan	The following table depicts the performance of loans that have been modified in the last 12 months : PERFORMANCE OF LOANS THAT HAVE BEEN MODIFIED IN THE LAST 12 MONTHS September 30, 2023 (Dollars in millions) Current 30-89 Days Past Due 90+ Days Past Due Non-Accruing C&I $ 77 $ — $ — $ 6 CRE 8 — — 50 Consumer Real Estate 2 — — 10 Credit Card and Other — — — — Total $ 87 $ — $ — $ 66
Schedule of Financing Receivable, Modified Loans in a TDR	The following table presents the end of period balance for loans modified in a TDR during the year ended December 31, 2022: LOANS MODIFIED IN A TDR Year Ended December 31, 2022 (Dollars in millions) Number Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment C&I 6 $ 30 $ 24 CRE 1 1 1 HELOC 98 7 7 Real estate installment loans 181 41 41 Credit card and other 81 12 12 Total TDRs 367 $ 91 $ 85
Schedule Of Troubled Debt Restructurings Within The Previous 12 Months	The following table presents TDRs which re-defaulted during 2022 and as to which the modification occurred 12 months or less prior to the re-default. For purposes of this disclosure, FHN generally defines payment default as 30 or more days past due. LOANS MODIFIED IN A TDR THAT RE-DEFAULTED Year Ended December 31, 2022 (Dollars in millions) Number Recorded C&I 5 $ — CRE — — HELOC 22 1 Real estate installment loans 54 15 Credit card and other 17 — Total TDRs 98 $ 16

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
Allowance for Credit Losses (Tables)	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Rollforward Of The Allowance For Loan Losses By Portfolio Segment	The following table provides a rollforward of the ALLL and the reserve for unfunded lending commitments by portfolio type for the three and nine months ended September 30, 2023 and 2022: ROLLFORWARD OF ALLL & RESERVE FOR UNFUNDED LENDING COMMITMENTS (Dollars in millions) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Three Months Ended September 30, 2023 Allowance for loan and lease losses: Balance as of July 1, 2023 $ 326 $ 159 $ 221 $ 31 $ 737 Charge-offs (b) (91) (5) (1) (7) (104) Recoveries 5 1 2 1 9 Provision for loan and lease losses 95 14 6 3 118 Balance as of September 30, 2023 $ 335 $ 169 $ 228 $ 28 $ 760 Reserve for remaining unfunded commitments: Balance as of July 1, 2023 $ 55 $ 24 $ 11 $ — $ 90 Provision for remaining unfunded commitments (6) (3) 1 — (8) Balance as of September 30, 2023 49 21 12 — 82 Allowance for credit losses as of September 30, 2023 $ 384 $ 190 $ 240 $ 28 $ 842 Three Months Ended September 30, 2022 Allowance for loan and lease losses: Balance as of July 1, 2022 $ 274 $ 141 $ 183 $ 26 $ 624 Charge-offs (13) (1) (1) (6) (21) Recoveries 2 — 6 1 9 Provision for loan and lease losses 32 8 5 7 52 Balance as of September 30, 2022 $ 295 $ 148 $ 193 $ 28 $ 664 Reserve for remaining unfunded commitments: Balance as of July 1, 2022 $ 53 $ 17 $ 10 $ — $ 80 Provision for remaining unfunded commitments 5 2 1 — 8 Balance as of September 30, 2022 58 19 11 — 88 Allowance for credit losses as of September 30, 2022 $ 353 $ 167 $ 204 $ 28 $ 752 (Dollars in millions) Commercial, Financial, and Industrial (a) Commercial Real Estate Consumer Real Estate Credit Card and Other Total Nine Months Ended September 30, 2023 Allowance for loan and lease losses: Balance as of January 1, 2023 $ 308 $ 146 $ 200 $ 31 $ 685 Adoption of ASU 2022-02 1 — (7) — (6) Charge-offs (b) (124) (15) (3) (17) (159) Recoveries 12 2 7 4 25 Provision for loan and lease losses 138 36 31 10 215 Balance as of September 30, 2023 $ 335 $ 169 $ 228 $ 28 $ 760 Reserve for remaining unfunded commitments: Balance as of January 1, 2023 $ 55 $ 22 $ 10 $ — $ 87 Provision for remaining unfunded commitments (6) (1) 2 — (5) Balance as of September 30, 2023 49 21 12 — 82 Allowance for credit losses as of September 30, 2023 $ 384 $ 190 $ 240 $ 28 $ 842 Nine Months Ended September 30, 2022 Allowance for loan and lease losses: Balance as of January 1, 2022 $ 334 $ 154 $ 163 $ 19 $ 670 Charge-offs (38) (1) (4) (18) (61) Recoveries 6 1 17 3 27 Provision for loan and lease losses (7) (6) 17 24 28 Balance as of September 30, 2022 $ 295 $ 148 $ 193 $ 28 $ 664 Reserve for remaining unfunded commitments: Balance as of January 1, 2022 $ 46 $ 12 $ 8 $ — $ 66 Provision for remaining unfunded commitments 12 7 3 — 22 Balance as of September 30, 2022 58 19 11 — 88 Allowance for credit losses as of September 30, 2022 $ 353 $ 167 $ 204 $ 28 $ 752 (a) C&I loans as of September 30, 2023 and 2022 include $35 million and $129 million in PPP loans, respectively, which due to the government guarantee and forgiveness provisions are considered to have no credit risk and therefore have no allowance for loan and lease losses. (b) Charge-offs in the C&I portfolio in 2023 include $72 million from a single credit from a company in bankruptcy.
Schedule Of Gross Charge Offs by Year of Origination	The following table represents gross charge-offs by year of origination for the nine months ended September 30, 2023: GROSS CHARGE-OFFS (Dollars in millions) 2023 2022 2021 2020 2019 Prior to 2019 Revolving Loans Total C&I (a) $ 74 $ 13 $ 6 $ 4 $ 9 $ 13 $ 5 $ 124 CRE — — — — 2 13 — 15 Consumer Real Estate — — — 1 — 2 — 3 Credit Card and Other 9 — 1 — — 2 5 17 Total $ 83 $ 13 $ 7 $ 5 $ 11 $ 30 $ 10 $ 159

Mortgage Banking Activity (Tabl

Mortgage Banking Activity (Tables)	9 Months Ended
Mortgage Banking Activity (Tables)	Sep. 30, 2023
Mortgage Banking [Abstract]
Schedule of Residential Mortgage Loans Held For Sale	The following table summarizes activity relating to residential mortgage loans held for sale as of and for the nine months ended September 30, 2023 and the year ended December 31, 2022. MORTGAGE LOAN ACTIVITY (Dollars in millions) September 30, 2023 December 31, 2022 Balance at beginning of period $ 44 $ 250 Originations and purchases 512 1,275 Sales, net of gains (475) (1,481) Balance at end of period $ 81 $ 44
Schedule of Mortgage Servicing Rights	Mortgage servicing rights had the following carrying values as of the periods indicated. MORTGAGE SERVICING RIGHTS September 30, 2023 December 31, 2022 (Dollars in millions) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Mortgage servicing rights $ 24 $ (6) $ 18 $ 21 $ (5) $ 16

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
Goodwill and Other Intangible Assets (Tables)	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill by Reportable Segment	The following is a summary of goodwill by reportable segment included in the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022. GOODWILL (Dollars in millions) Regional Specialty Banking Total December 31, 2021 $ 880 $ 631 $ 1,511 Additions — — — December 31, 2022 $ 880 $ 631 $ 1,511 Additions — — — September 30, 2023 $ 880 $ 631 $ 1,511
Summary of Intangible Assets and Accumulated Amortization Included in the Consolidated Statements of Condition	The following table, which excludes fully amortized intangibles, presents other intangible assets included in the Consolidated Balance Sheets: OTHER INTANGIBLE ASSETS September 30, 2023 December 31, 2022 (Dollars in millions) Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Core deposit intangibles $ 368 $ (199) $ 169 $ 371 $ (171) $ 200 Client relationships 32 (15) 17 32 (13) 19 Other (a) 27 (15) 12 27 (12) 15 Total $ 427 $ (229) $ 198 $ 430 $ (196) $ 234 (a) Includes non-compete covenants and purchased credit card intangible assets. Also includes state banking licenses which are not subject to amortization.

Preferred Stock (Tables)

Preferred Stock (Tables)	9 Months Ended
Preferred Stock (Tables)	Sep. 30, 2023
Equity [Abstract]
Schedule of Stock by Class	The following table presents a summary of FHN's non-cumulative perpetual preferred stock: PREFERRED STOCK (Dollars in millions) September 30, 2023 December 31, 2022 Issuance Date Earliest Redemption Date (a) Annual Dividend Rate Dividend Payments Shares Outstanding Liquidation Amount Carrying Amount Carrying Amount Series B 7/2/2020 8/1/2025 6.625% (b) Semi-annually 8,000 $ 80 $ 77 $ 77 Series C 7/2/2020 5/1/2026 6.600% (c) Quarterly 5,750 58 59 59 Series D 7/2/2020 5/1/2024 6.100% (d) Semi-annually 10,000 100 94 94 Series E 5/28/2020 10/10/2025 6.500% Quarterly 1,500 150 145 145 Series F 5/3/2021 7/10/2026 4.700% Quarterly 1,500 150 145 145 Series G 2/28/2022 2/28/2027 N/A N/A — — — 494 26,750 $ 538 $ 520 $ 1,014 N/A - not applicable (a) Denotes earliest optional redemption date. Earlier redemption is possible, at FHN's election, if certain regulatory capital events occur. (b) Fixed dividend rate will reset on August 1, 2025 to three-month CME Term SOFR plus 4.52361% (0.26161% plus 4.262%). (c) Fixed dividend rate will reset on May 1, 2026 to three-month CME Term SOFR plus 5.18161% (0.26161% plus 4.920%). (d) Fixed dividend rate will reset on May 1, 2024 to three-month CME Term SOFR plus 4.12061% (0.26161% plus 3.859%).

Components of Other Comprehen_2

Components of Other Comprehensive Income (Loss) (Tables)	9 Months Ended
Components of Other Comprehensive Income (Loss) (Tables)	Sep. 30, 2023
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income/(Loss)	The following table provides the changes in accumulated other comprehensive income (loss) by component, net of tax, for the three and nine months ended September 30, 2023 and 2022: ACCUMULATED OTHER COMPREHENSIVE INCOME (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of July 1, 2023 $ (964) $ (129) $ (266) $ (1,359) Net unrealized gains (losses) (206) (34) 1 (239) Amounts reclassified from AOCI — 14 2 16 Other comprehensive income (loss) (206) (20) 3 (223) Balance as of September 30, 2023 $ (1,170) $ (149) $ (263) $ (1,582) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of January 1, 2023 $ (973) $ (127) $ (268) $ (1,368) Net unrealized gains (losses) (197) (60) (1) (258) Amounts reclassified from AOCI — 38 6 44 Other comprehensive income (loss) (197) (22) 5 (214) Balance as of September 30, 2023 $ (1,170) $ (149) $ (263) $ (1,582) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of July 1, 2022 $ (671) $ (40) $ (252) $ (963) Net unrealized gains (losses) (368) (103) — (471) Amounts reclassified from AOCI — 4 3 7 Other comprehensive income (loss) (368) (99) 3 (464) Balance as of September 30, 2022 $ (1,039) $ (139) $ (249) $ (1,427) (Dollars in millions) Securities AFS Cash Flow Hedges Pension and Total Balance as of January 1, 2022 $ (36) $ 3 $ (255) $ (288) Net unrealized gains (losses) (1,003) (149) — (1,152) Amounts reclassified from AOCI — 7 6 13 Other comprehensive income (loss) (1,003) (142) 6 (1,139) Balance as of September 30, 2022 $ (1,039) $ (139) $ (249) $ (1,427)
Reclassification Out Of Accumulated Other Comprehensive Income	Reclassifications from AOCI, and related tax effects, were as follows: RECLASSIFICATIONS FROM AOCI (Dollars in millions) Three Months Ended Nine Months Ended Details about AOCI 2023 2022 2023 2022 Affected line item in the statement where net Cash Flow Hedges: Realized (gains) losses on cash flow hedges $ 18 $ 5 $ 50 $ 9 Interest and fees on loans and leases Tax expense (benefit) (4) (1) (12) (2) Income tax expense 14 4 38 7 Pension and Postretirement Plans: Amortization of prior service cost and net actuarial (gain) loss 3 4 8 8 Other expense Tax expense (benefit) (1) (1) (2) (2) Income tax expense 2 3 6 6 Total reclassification from AOCI $ 16 $ 7 $ 44 $ 13

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
Earnings Per Share (Tables)	Sep. 30, 2023
Earnings Per Share [Abstract]
Schedule of Reconciliation Of Earnings Per Common And Diluted Share	The computations of basic and diluted earnings per common share were as follows: EARNINGS PER SHARE COMPUTATIONS Three Months Ended Nine Months Ended (Dollars in millions, except per share data; shares in thousands) 2023 2022 2023 2022 Net income $ 142 $ 268 $ 727 $ 642 Net income attributable to noncontrolling interest 5 3 14 8 Net income attributable to controlling interest 137 265 713 634 Preferred stock dividends 8 8 24 24 Net income available to common shareholders $ 129 $ 257 $ 689 $ 610 Weighted average common shares outstanding—basic 558,559 535,986 544,952 534,613 Effect of dilutive restricted stock, performance equity awards and options 2,862 6,655 4,250 7,258 Effect of dilutive convertible preferred stock (a) — 27,512 12,728 21,667 Weighted average common shares outstanding—diluted 561,421 570,153 561,930 563,538 Basic earnings per common share $ 0.23 $ 0.48 $ 1.26 $ 1.14 Diluted earnings per common share $ 0.23 $ 0.45 $ 1.23 $ 1.08 (a) On February 28, 2022, FHN issued $494 million of Series G Convertible Preferred Stock, which was converted into common stock on June 26, 2023, following the termination of the TD Merger Agreement. Conversion occurred at the rate of 4,000 common shares per Series G preferred share resulting in 19,742,776 additional common shares outstanding. 2023 includes the impact of the Series G based on the final conversion rate and 2022 includes the impact based on the original maximum conversion rate. For more information on the convertible features, including the conversion rate, see Note 7 - Preferred Stock.
Schedule of Anti-Dilutive Options and Awards	The following table presents average outstanding options and other equity awards that were excluded from the calculation of diluted earnings per share because they were either anti-dilutive (the exercise price was higher than the weighted-average market price for the period) or the performance conditions have not been met: ANTI-DILUTIVE EQUITY AWARDS Three Months Ended Nine Months Ended (Shares in thousands) 2023 2022 2023 2022 Stock options excluded from the calculation of diluted EPS 1,928 11 — 35 Weighted average exercise price of stock options excluded from the calculation of diluted EPS $ 16.44 $ 26.03 $ 24.36 $ 25.65 Other equity awards excluded from the calculation of diluted EPS 7,589 493 2,496 199

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
Retirement Plans (Tables)	Sep. 30, 2023
Retirement Benefits, Description [Abstract]
Schedule of Components of Net Periodic Benefit Cost	The components of net periodic benefit cost for the three and nine months ended September 30 were as follows: COMPONENTS OF NET PERIODIC BENEFIT COST Three months ended September 30, Nine months ended September 30, (Dollars in millions) 2023 2022 2023 2022 Components of net periodic benefit cost Interest cost $ 10 $ 5 $ 26 $ 15 Expected return on plan assets (9) (6) (25) (18) Amortization of unrecognized: Actuarial (gain) loss 3 4 9 8 Net periodic benefit cost $ 4 $ 3 $ 10 $ 5

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
Business Segment Information (Tables)	Sep. 30, 2023
Segment Reporting [Abstract]
Schedule of Segment Financial Information	The following tables present financial information for each reportable business segment for the three and nine months ended September 30, 2023 and 2022: SEGMENT FINANCIAL INFORMATION Three Months Ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 583 $ 135 $ (113) $ 605 Provision for credit losses 104 6 — 110 Noninterest income 109 46 18 173 Noninterest expense (b) 318 89 67 474 Income (loss) before income taxes 270 86 (162) 194 Income tax expense (benefit) (c) 63 21 (32) 52 Net income (loss) $ 207 $ 65 $ (130) $ 142 Average assets $ 46,657 $ 20,687 $ 15,876 $ 83,220 Three Months Ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 518 $ 138 $ 6 $ 662 Provision for credit losses 43 17 — 60 Noninterest income (a) 110 64 39 213 Noninterest expense (b) 303 105 61 469 Income (loss) before income taxes 282 80 (16) 346 Income tax expense (benefit) 66 19 (7) 78 Net income (loss) $ 216 $ 61 $ (9) $ 268 Average assets $ 42,820 $ 19,745 $ 19,986 $ 82,551 (a) 2022 includes a $21 million gain related to the sale of the title insurance business and a $10 million gain on equity securities in the Corporate segment. (b) 2023 includes $10 million of restructuring costs in the Corporate segment. 2022 includes $24 million in merger and integration expenses related to the IBKC merger and TD Transaction in the Corporate segment. (c) 2023 includes $24 million in expense related to the surrender of bank owned life insurance policies and an $11 million benefit from merger-related tax items in the Corporate segment. Nine Months Ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 1,781 $ 390 $ (248) $ 1,923 Provision for credit losses 189 26 (5) 210 Noninterest income (a) 325 147 273 745 Noninterest expense (b) 960 270 278 1,508 Income (loss) before income taxes 957 241 (248) 950 Income tax expense (benefit) (c) 224 58 (59) 223 Net income (loss) $ 733 $ 183 $ (189) $ 727 Average assets $ 45,594 $ 20,054 $ 15,823 $ 81,471 Nine Months Ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Net interest income (expense) $ 1,410 $ 423 $ (150) $ 1,683 Provision for credit losses 64 (4) (10) 50 Noninterest income (a) 337 265 40 642 Noninterest expense (b) 906 352 192 1,450 Income (loss) before income taxes 777 340 (292) 825 Income tax expense (benefit) 182 83 (82) 183 Net income (loss) $ 595 $ 257 $ (210) $ 642 Average assets $ 41,779 $ 20,073 $ 23,947 $ 85,799 (a) 2023 includes a $225 million gain on merger termination in the Corporate segment. 2022 includes a $12 million gain on sale of mortgage servicing rights in the Specialty Banking segment and a $21 million gain related to the sale of the title insurance business, a $10 million gain on equity securities and a $6 million gain related to a fintech investment in the Corporate segment. (b) 2023 includes $10 million of restructuring costs, a $50 million contribution to the First Horizon Foundation, $15 million in derivative valuation adjustments related to prior Visa Class-B share sales and $51 million in merger and integration planning expenses related to the TD Transaction in the Corporate segment. 2022 includes $99 million in merger and integration expenses related to the IBKC merger and TD Transaction and $12 million in derivative valuation adjustments related to prior Visa Class-B share sales in the Corporate segment. (c) 2023 includes $24 million in expense related to the surrender of bank owned life insurance policies and an $11 million benefit from merger-related tax items in the Corporate segment. The following tables reflect a disaggregation of FHN’s noninterest income by major product line and reportable segment for the three and nine months ended September 30, 2023 and 2022: NONINTEREST INCOME DETAIL BY SEGMENT Three months ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 41 $ 3 $ 2 $ 46 Fixed income (a) — 28 — 28 Brokerage, management fees and commissions 21 — — 21 Card and digital banking fees 19 — 1 20 Other service charges and fees 7 7 — 14 Trust services and investment management 12 — — 12 Mortgage banking and title income — 7 — 7 Other income (c) 9 1 15 25 Total noninterest income $ 109 $ 46 $ 18 $ 173 Three months ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 39 $ 2 $ 2 $ 43 Fixed income (a) — 46 — 46 Brokerage, management fees and commissions 23 — — 23 Card and digital banking fees 19 — 2 21 Other service charges and fees 8 5 — 13 Trust services and investment management 11 — — 11 Mortgage banking and title income — 9 — 9 Deferred compensation income — — (3) (3) Securities gains (losses), net (b) — — 12 12 Other income (c) 10 2 26 38 Total noninterest income $ 110 $ 64 $ 39 $ 213 (a) 2023 and 2022 includes $13 million of underwriting, portfolio advisory, and other noninterest income in scope of ASC 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes letter of credit fees and insurance commissions in scope of ASC 606. Nine months ended September 30, 2023 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 120 $ 7 $ 6 $ 133 Fixed income (a) — 98 (1) 97 Brokerage, management fees and commissions 66 — — 66 Card and digital banking fees 55 1 5 61 Other service charges and fees 23 18 — 41 Trust services and investment management 35 — — 35 Mortgage banking and title income — 18 — 18 Deferred compensation income — — 11 11 Gain on merger termination — — 225 225 Securities gains (losses), net (b) — — 1 1 Other income (c) 26 5 26 57 Total noninterest income $ 325 $ 147 $ 273 $ 745 Nine months ended September 30, 2022 (Dollars in millions) Regional Banking Specialty Banking Corporate Consolidated Noninterest income: Deposit transactions and cash management $ 115 $ 7 $ 7 $ 129 Fixed income (a) — 170 — 170 Brokerage, management fees and commissions 71 — — 71 Card and digital banking fees 57 2 5 64 Other service charges and fees 24 17 — 41 Trust services and investment management 36 — — 36 Mortgage banking and title income — 65 — 65 Deferred compensation income — — (24) (24) Securities gains (losses), net (b) — — 18 18 Other income (c) 34 4 34 72 Total noninterest income $ 337 $ 265 $ 40 $ 642 (a) 2023 and 2022 includes $32 million and $33 million, respectively, of underwriting, portfolio advisory, and other noninterest income in scope of ASC 606, "Revenue From Contracts With Customers." (b) Represents noninterest income excluded from the scope of ASC 606. Amount is presented for informational purposes to reconcile total noninterest income. (c) Includes letter of credit fees and insurance commissions in scope of ASC 606.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
Variable Interest Entities (Tables)	Sep. 30, 2023
Variable Interest Entities [Abstract]
Summary Of VIEs Consolidated By FHN	The following table summarizes the carrying value of assets and liabilities associated with rabbi trusts used for deferred compensation plans which are consolidated by FHN as of September 30, 2023 and December 31, 2022: CONSOLIDATED VIEs (Dollars in millions) September 30, 2023 December 31, 2022 Assets: Other assets $ 172 $ 181 Liabilities: Other liabilities $ 144 $ 150
Summary of the Impact of Qualifying LIHTC Investments	The following table summarizes the impact to income tax expense on the Consolidated Statements of Income for the three and nine months ended September 30, 2023 and 2022 for LIHTC investments accounted for under the proportional amortization method. LIHTC IMPACTS ON TAX EXPENSE Three Months Ended Nine Months Ended (Dollars in millions) 2023 2022 2023 2022 Income tax expense (benefit): Amortization of qualifying LIHTC investments $ 13 $ 11 $ 39 $ 33 Low income housing tax credits (14) (11) (41) (35) Other tax benefits related to qualifying LIHTC investments (3) (3) (8) (9)
Summary Of VIEs Not Consolidated By FHN	The following tables summarize FHN’s nonconsolidated VIEs as of September 30, 2023 and December 31, 2022: NONCONSOLIDATED VIEs AT SEPTEMBER 30, 2023 (Dollars in millions) Maximum Liability Classification Type Low income housing partnerships $ 498 $ 155 (a) Other tax credit investments (b) 81 65 Other assets Small issuer trust preferred holdings (c) 173 — Loans and leases On-balance sheet trust preferred securitization 27 87 (d) Holdings of agency mortgage-backed securities (c) 7,907 — (e) Commercial loan modifications to borrowers experiencing financial difficulty (f) 39 — Loans and leases Proprietary trust preferred issuances (g) — 167 Term borrowings (a) Maximum loss exposure represents $343 million of current investments and $155 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events and are also recognized in other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2024. (b) Maximum loss exposure represents the value of current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112 million classified as loans and leases and $2 million classified as trading securities, which are offset by $87 million classified as term borrowings. (e) Includes $147 million classified as trading securities, $1.3 billion classified as held to maturity and $6.4 billion classified as securities available for sale. (f) Maximum loss exposure represents $39 million of current receivables with no additional contractual funding commitments on loans related to commercial loan modifications to borrowers experiencing financial difficulty. (g) No exposure to loss due to nature of FHN's involvement. NONCONSOLIDATED VIEs AT DECEMBER 31, 2022 (Dollars in millions) Maximum Liability Classification Type Low income housing partnerships $ 463 $ 154 (a) Other tax credit investments (b) 85 67 Other assets Small issuer trust preferred holdings (c) 171 — Loans and leases On-balance sheet trust preferred securitization 27 87 (d) Holdings of agency mortgage-backed securities (c) 8,652 — (e) Commercial loan troubled debt restructurings (f) 53 — Loans and leases Proprietary trust preferred issuances (g) — 167 Term borrowings (a) Maximum loss exposure represents $309 million of current investments and $154 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events and are also recognized in other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2024. (b) Maximum loss exposure represents current investments. (c) Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a holder of the trusts’ securities. (d) Includes $112 million classified as loans and leases and $2 million classified as trading securities, which are offset by $87 million classified as term borrowings. (e) Includes $205 million classified as trading securities, $1.4 billion classified as held to maturity and $7.1 billion classified as securities available for sale. (f) Maximum loss exposure represents $53 million of current receivables with no additional contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring. (g) No exposure to loss due to nature of FHN's involvement.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
Derivatives (Tables)	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives Associated With Fixed Income Trading Activities	The following table summarizes derivatives associated with FHNF's trading activities as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH TRADING September 30, 2023 (Dollars in millions) Notional Assets Liabilities Customer interest rate contracts $ 3,724 $ 4 $ 311 Offsetting upstream interest rate contracts 3,958 222 6 Forwards and futures purchased 1,202 1 7 Forwards and futures sold 1,275 8 1 December 31, 2022 (Dollars in millions) Notional Assets Liabilities Customer interest rate contracts $ 3,076 $ 3 $ 270 Offsetting upstream interest rate contracts 3,076 91 6 Option contracts purchased 40 — — Forwards and futures purchased 1,127 5 2 Forwards and futures sold 1,256 4 5
Derivatives Associated With Interest Rate Risk Management Activities	The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH INTEREST RATE RISK MANAGEMENT September 30, 2023 (Dollars in millions) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 8,563 $ 1 $ 631 Offsetting upstream interest rate contracts 8,563 626 2 December 31, 2022 (Dollars in millions) Notional Assets Liabilities Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts $ 8,377 $ 3 $ 570 Offsetting upstream interest rate contracts 8,377 351 5
Gains/(Losses) on Derivatives Associated with Interest Rate Risk Management Activities	The following table summarizes gains (losses) on FHN’s derivatives associated with interest rate risk management activities for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH INTEREST RATE RISK MANAGEMENT Three Months Ended Nine Months Ended 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Customer Interest Rate Contracts Hedging Hedging Instruments and Hedged Items: Customer interest rate contracts (a) $ (95) $ 271 $ (63) $ 788 Offsetting upstream interest rate contracts (a) 95 (271) 63 (788) (a) Gains (losses) included in other expense within the Consolidated Statements of Income.
Derivative Associated With Cash Flow Hedges	The following tables summarize FHN’s derivative activities associated with cash flow hedges as of September 30, 2023 and December 31, 2022: DERIVATIVES ASSOCIATED WITH CASH FLOW HEDGES September 30, 2023 (Dollars in millions) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 5,200 $ — $ 118 Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 5,200 N/A December 31, 2022 (Dollars in millions) Notional Assets Liabilities Cash Flow Hedges Hedging Instruments: Interest rate contracts $ 5,350 $ — $ 71 Hedged Items: Variability in cash flows related to debt instruments (primarily loans) N/A $ 5,350 N/A
Gains/(Losses) on Derivatives Associated with Cash Flow Hedges	The following table summarizes gains (losses) on FHN’s derivatives associated with cash flow hedges for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH CASH FLOW HEDGES Three Months Ended Nine Months Ended 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Cash Flow Hedges Hedging Instruments: Interest rate contracts (a) $ (30) $ (138) $ (44) $ (105) Gain (loss) recognized in other comprehensive income (loss) (34) (103) (60) (149) Gain (loss) reclassified from AOCI into interest income 14 4 38 7 (a) Approximately $29 million of pre-tax losses are expected to be reclassified into earnings in the next twelve months.
Derivatives Gains/Losses Associated With Mortgage Banking Hedges	The notional and fair values of these contracts are presented in the table below. DERIVATIVES ASSOCIATED WITH MORTGAGE BANKING HEDGES September 30, 2023 (Dollars in millions) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 84 $ 1 $ — Forward contracts written 129 1 — December 31, 2022 (Dollars in millions) Notional Assets Liabilities Mortgage Banking Hedges Option contracts written $ 35 $ — $ — Forward contracts written 61 — — The following table summarizes gains (losses) on FHN's derivatives associated with mortgage banking activities for the three and nine months ended September 30, 2023 and 2022: DERIVATIVE GAINS (LOSSES) ASSOCIATED WITH MORTGAGE BANKING HEDGES Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 (Dollars in millions) Gains (Losses) Gains (Losses) Gains (Losses) Gains (Losses) Mortgage Banking Hedges Option contracts written $ — $ 4 $ (2) $ 5 Forward contracts written (2) 6 2 33
Derivative Assets And Collateral Received	The following table provides details of derivative assets and collateral received as presented on the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022: DERIVATIVE ASSETS & COLLATERAL RECEIVED Gross amounts not offset in the Balance Sheets (Dollars in millions) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative assets: September 30, 2023 Interest rate derivative contracts $ 853 $ — $ 853 $ (96) $ (662) $ 95 Forward contracts 8 — 8 (4) — 4 $ 861 $ — $ 861 $ (100) $ (662) $ 99 December 31, 2022 Interest rate derivative contracts $ 449 $ — $ 449 $ (58) $ (378) $ 13 Forward contracts 9 — 9 (6) (2) 1 $ 458 $ — $ 458 $ (64) $ (380) $ 14 (a) Included in other assets on the Consolidated Balance Sheets. As of September 30, 2023 and December 31, 2022, $2 million and $2 million, respectively, of derivative assets have been excluded from these tables because they are generally not subject to master netting or similar agreements.
Derivative Liabilities and Collateral Pledged	The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022: DERIVATIVE LIABILITIES & COLLATERAL PLEDGED Gross amounts not offset (Dollars in millions) Gross amounts Gross amounts Net amounts of Derivative Collateral Net amount Derivative liabilities: September 30, 2023 Interest rate derivative contracts $ 1,068 $ — $ 1,068 $ (96) $ (238) $ 734 Forward contracts 8 — 8 (4) (1) 3 $ 1,076 $ — $ 1,076 $ (100) $ (239) $ 737 December 31, 2022 Interest rate derivative contracts $ 921 $ — $ 921 $ (58) $ (175) $ 688 Forward contracts 8 — 8 (6) (1) 1 $ 929 $ — $ 929 $ (64) $ (176) $ 689 (a) Included in other liabilities on the Consolidated Balance Sheets. As of September 30, 2023 and December 31, 2022, $27 million and $29 million, respectively, of derivative liabilities (primarily Visa-related derivatives) have been excluded from these tables because they are generally not subject to master netting or similar agreements.

Master Netting and Similar Ag_2

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions (Tables)	9 Months Ended
	Sep. 30, 2023
Offsetting [Abstract]
Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties	The following table provides details of securities purchased under agreements to resell and collateral pledged by counterparties as of September 30, 2023 and December 31, 2022: SECURITIES PURCHASED UNDER AGREEMENTS TO RESELL Gross amounts not offset in the (Dollars in millions) Gross amounts Gross amounts Net amounts of Offsetting Securities collateral Net amount Securities purchased under agreements to resell: September 30, 2023 $ 363 $ — $ 363 $ — $ (361) $ 2 December 31, 2022 353 — 353 (10) (340) 3
Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company	The following table provides details of securities sold under agreements to repurchase and collateral pledged by FHN as of September 30, 2023 and December 31, 2022: SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Gross amounts not offset in the (Dollars in millions) Gross amounts Gross amounts Net amounts of Offsetting Securities/ Net amount Securities sold under agreements to repurchase: September 30, 2023 $ 1,707 $ — $ 1,707 $ — $ (1,707) $ — December 31, 2022 1,013 — 1,013 (10) (1,003) —
Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase	The following table provides details, by collateral type, of the remaining contractual maturity of securities sold under agreements to repurchase as of September 30, 2023 and December 31, 2022: MATURITIES OF SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE September 30, 2023 (Dollars in millions) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: Government agency issued MBS $ 1,508 $ — $ 1,508 Government agency issued CMO 159 — 159 Other U.S. government agencies 40 — 40 Total securities sold under agreements to repurchase $ 1,707 $ — $ 1,707 December 31, 2022 (Dollars in millions) Overnight and Up to 30 Days Total Securities sold under agreements to repurchase: U.S. treasuries $ 10 $ — $ 10 Government agency issued MBS 851 — 851 Government agency issued CMO 122 — 122 Other U.S. government agencies 30 — 30 Total securities sold under agreements to repurchase $ 1,013 $ — $ 1,013

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	9 Months Ended
Fair Value of Assets and Liabilities (Tables)	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following table presents the balances of assets and liabilities measured at fair value on a recurring basis as of September 30, 2023 and December 31, 2022: BALANCES OF ASSETS & LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS September 30, 2023 (Dollars in millions) Level 1 Level 2 Level 3 Total Trading securities: U.S. treasuries $ — $ 24 $ — $ 24 Government agency issued MBS — 53 — 53 Government agency issued CMO — 94 — 94 Other U.S. government agencies — 252 — 252 States and municipalities — 26 — 26 Corporate and other debt — 759 — 759 Interest-only strips (elected fair value) — — 23 23 Total trading securities — 1,208 23 1,231 Loans held for sale (elected fair value) — 67 21 88 Securities available for sale: Government agency issued MBS — 4,325 — 4,325 Government agency issued CMO — 2,100 — 2,100 Other U.S. government agencies — 1,128 — 1,128 States and municipalities — 547 — 547 Total securities available for sale — 8,100 — 8,100 Other assets: Deferred compensation mutual funds 99 — — 99 Equity, mutual funds, and other 23 — — 23 Derivatives, forwards and futures 10 — — 10 Derivatives, interest rate contracts — 853 — 853 Total other assets 132 853 — 985 Total assets $ 132 $ 10,228 $ 44 $ 10,404 Trading liabilities: U.S. treasuries $ — $ 301 $ — $ 301 Other U.S. government agencies — 9 — 9 Government agency issued MBS — 1 — 1 Corporate and other debt — 55 — 55 Total trading liabilities — 366 — 366 Other liabilities: Derivatives, forwards and futures 8 — — 8 Derivatives, interest rate contracts — 1,068 — 1,068 Derivatives, other — — 26 26 Total other liabilities 8 1,068 26 1,102 Total liabilities $ 8 $ 1,434 $ 26 $ 1,468 December 31, 2022 (Dollars in millions) Level 1 Level 2 Level 3 Total Trading securities: U.S. treasuries $ — $ 101 $ — $ 101 Government agency issued MBS — 144 — 144 Government agency issued CMO — 61 — 61 Other U.S. government agencies — 115 — 115 States and municipalities — 54 — 54 Corporate and other debt — 875 — 875 Interest-only strips (elected fair value) — — 25 25 Total trading securities — 1,350 25 1,375 Loans held for sale (elected fair value) — 29 22 51 Securities available for sale: Government agency issued MBS — 4,763 — 4,763 Government agency issued CMO — 2,313 — 2,313 Other U.S. government agencies — 1,163 — 1,163 States and municipalities — 597 — 597 Total securities available for sale — 8,836 — 8,836 Other assets: Deferred compensation mutual funds 112 — — 112 Equity, mutual funds, and other 22 — — 22 Derivatives, forwards and futures 9 — — 9 Derivatives, interest rate contracts — 449 — 449 Derivatives, other — 2 — 2 Total other assets 143 451 — 594 Total assets $ 143 $ 10,666 $ 47 $ 10,856 Trading liabilities: U.S. treasuries $ — $ 275 $ — $ 275 Government agency issued MBS — 2 — 2 Corporate and other debt — 58 — 58 Total trading liabilities — 335 — 335 Other liabilities: Derivatives, forwards and futures 8 — — 8 Derivatives, interest rate contracts — 922 — 922 Derivatives, other — 1 27 28 Total other liabilities 8 923 27 958 Total liabilities $ 8 $ 1,258 $ 27 $ 1,293
Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value	The changes in Level 3 assets and liabilities measured at fair value for the three months ended September 30, 2023 and 2022 on a recurring basis are summarized as follows: CHANGES IN LEVEL 3 ASSETS & LIABILITIES MEASURED AT FAIR VALUE Three Months Ended September 30, 2023 (Dollars in millions) Interest-only strips Loans held Net Balance on July 1, 2023 $ 36 $ 22 $ (34) Total net gains (losses) included in net income (4) — — Sales (30) — — Settlements — (1) 8 Net transfers into (out of) Level 3 21 (b) — — Balance on September 30, 2023 $ 23 $ 21 $ (26) Net unrealized gains (losses) included in net income $ (2) (c) $ — (a) $ — (d) Three Months Ended September 30, 2022 (Dollars in millions) Interest-only strips Loans held Net Balance on July 1, 2022 $ 26 $ 34 $ (28) Total net gains (losses) included in net income (2) — (1) Sales (23) (14) — Settlements — — 9 Repayments — (1) — Net transfers into (out of) Level 3 22 (b) 1 — Balance on September 30, 2022 $ 23 $ 20 $ (20) Net unrealized gains (losses) included in net income $ (1) (c) $ — (a) $ (1) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in other expense. The changes in Level 3 assets and liabilities measured at fair value for the nine months ended September 30, 2023 and 2022 on a recurring basis are summarized as follows: CHANGES IN LEVEL 3 ASSETS & LIABILITIES MEASURED AT FAIR VALUE Nine Months Ended September 30, 2023 (Dollars in millions) Interest-only strips Loans held Net Balance on January 1, 2023 $ 25 $ 22 $ (27) Total net gains (losses) included in net income (10) — (15) Purchases — 2 — Sales (38) (2) — Settlements — (1) 16 Net transfers into (out of) Level 3 46 (b) — — Balance on September 30, 2023 $ 23 $ 21 $ (26) Net unrealized gains (losses) included in net income $ (4) (c) $ — (a) $ (15) (d) Nine Months Ended September 30, 2022 (Dollars in millions) Interest-only strips Loans held Net Balance on January 1, 2022 $ 38 $ 28 $ (23) Total net gains (losses) included in net income (5) — (13) Purchases — 1 — Sales (61) (14) — Settlements — (1) 16 Repayments — (1) — Net transfers into (out of) Level 3 51 (b) 7 — Balance on September 30, 2022 $ 23 $ 20 $ (20) Net unrealized gains (losses) included in net income $ (2) (c) $ — (a) $ (13) (d) (a) Primarily included in mortgage banking and title income on the Consolidated Statements of Income. (b) Transfers into interest-only strips level 3 measured on a recurring basis reflect movements from loans held for sale (Level 2 nonrecurring). (c) Primarily included in fixed income on the Consolidated Statements of Income. (d) Included in other expense.
Nonrecurring Fair Value Measurements	For assets measured at fair value on a nonrecurring basis which were still held on the Consolidated Balance Sheets at September 30, 2023, and December 31, 2022, respectively, the following tables provide the level of valuation assumptions used to determine each adjustment and the related carrying value. LEVEL OF VALUATION ASSUMPTIONS FOR ASSETS MEASURED AT FAIR VALUE ON A NON-RECURRING BASIS Carrying value at September 30, 2023 (Dollars in millions) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 496 $ — $ 496 Loans and leases (a) — — 223 223 OREO (b) — — 4 4 Other assets (c) — — 92 92 Carrying value at December 31, 2022 (Dollars in millions) Level 1 Level 2 Level 3 Total Loans held for sale—SBAs and USDA $ — $ 506 $ — $ 506 Loans and leases (a) — — 135 135 OREO (b) — — 3 3 Other assets (c) — — 91 91 (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method.
Gains/(losses) on Nonrecurring Fair Value Measurements	For assets measured on a nonrecurring basis which were still held on the Consolidated Balance Sheets at period end, the following table provides information about the fair value adjustments recorded during the three and nine months ended September 30, 2023 and 2022: FAIR VALUE ADJUSTMENTS ON ASSETS MEASURED ON A NONRECURRING BASIS Net gains (losses) Net gains (losses) (Dollars in millions) 2023 2022 2023 2022 Loans held for sale—SBAs and USDA $ (1) $ (2) $ (2) $ (4) Loans and leases (a) (15) (6) (29) (7) Other assets (b) (1) (4) (5) (8) $ (17) $ (12) $ (36) $ (19) (a) Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents tax credit investments accounted for under the equity method.
Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements	The following table provides information regarding the unobservable inputs utilized in determining the fair value of Level 3 recurring and non-recurring measurements as of September 30, 2023 and December 31, 2022: UNOBSERVABLE INPUTS USED IN LEVEL 3 FAIR VALUE MEASUREMENTS (Dollars in millions) Values Utilized Level 3 Class Fair Value at September 30, 2023 Valuation Techniques Unobservable Input Range Weighted Average (d) Trading securities - SBA interest-only strips $ 23 Discounted cash flow Constant prepayment rate 12% - 13% 13% Bond equivalent yield 18% - 19% 18% Loans held for sale - residential real estate $ 21 Discounted cash flow Prepayment speeds - First mortgage 2% - 7% 3% Foreclosure losses 64% - 73% 65% Loss severity trends - First mortgage 0% - 8% of UPB 4% Derivative liabilities, other $ 26 Discounted cash flow Visa covered litigation resolution amount $5.7 billion - $6.7 billion $6.3 billion Probability of resolution scenarios 10% - 25% 18% Time until resolution 12 - 36 months 26 months Loans and leases (a) $ 223 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) $ 4 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) $ 92 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value. (Dollars in millions) Values Utilized Level 3 Class Fair Value at December 31, 2022 Valuation Techniques Unobservable Input Range Weighted Average (d) Trading securities - SBA interest-only strips $ 25 Discounted cash flow Constant prepayment rate 12% - 13% 12% Bond equivalent yield 17% 17% Loans held for sale - residential real estate $ 22 Discounted cash flow Prepayment speeds - First mortgage 2% - 8% 3% Foreclosure losses 63% - 75% 65% Loss severity trends - First mortgage 0% - 11% of UPB 5% Derivative liabilities, other $ 27 Discounted cash flow Visa covered litigation resolution amount $5.6 billion - $6.0 billion $5.9 billion Probability of resolution scenarios 5% - 25% 20% Time until resolution 12 - 42 months 28 months Loans and leases (a) $ 135 Appraisals from comparable properties Marketability adjustments for specific properties 0% - 10% of appraisal NM Other collateral valuations Borrowing base certificates adjustment 20% - 50% of gross value NM Financial Statements/Auction values adjustment 0% - 25% of reported value NM OREO (b) $ 3 Appraisals from comparable properties Adjustment for value changes since appraisal 0% - 10% of appraisal NM Other assets (c) $ 91 Discounted cash flow Adjustments to current sales yields for specific properties 0% - 15% adjustment to yield NM Appraisals from comparable properties Marketability adjustments for specific properties 0% - 25% of appraisal NM NM - Not meaningful (a) Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral less estimated costs to sell. Write-downs on these loans are recognized as part of provision for credit losses. (b) Represents the fair value of foreclosed properties that were measured subsequent to their initial classification as OREO. Balance excludes OREO related to government insured mortgages. (c) Represents tax credit investments accounted for under the equity method. (d) Weighted averages are determined by the relative fair value of the instruments or the relative contribution to an instrument's fair value.
Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount	The following table reflects the differences between the fair value carrying amount of residential real estate loans held for sale and held for investment measured at fair value in accordance with management’s election and the aggregate unpaid principal amount FHN is contractually entitled to receive at maturity. DIFFERENCES BETWEEN FAIR VALUE CARRYING AMOUNTS AND CONTRACTUAL AMOUNTS OF RESIDENTIAL REAL ESTATE LOANS REPORTED AT FAIR VALUE September 30, 2023 (Dollars in millions) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 88 $ 96 $ (8) Nonaccrual loans 2 5 (3) December 31, 2022 (Dollars in millions) Fair value Aggregate Fair value carrying amount Residential real estate loans held for sale reported at fair value: Total loans $ 51 $ 58 $ (7) Nonaccrual loans 5 8 (3) Loans 90 days or more past due and still accruing 1 1 —
Changes In Fair Value Of Assets And Liabilities Which Fair Value Option Included In Current Period Earnings	Assets and liabilities accounted for under the fair value election are initially measured at fair value with subsequent changes in fair value recognized in earnings. Such changes in the fair value of assets and liabilities for which FHN elected the fair value option are included in current period earnings with classification in the income statement line item reflected in the following table: CHANGES IN FAIR VALUE RECOGNIZED IN NET INCOME Three Months Ended Nine Months Ended (Dollars in millions) 2023 2022 2023 2022 Changes in fair value included in net income: Mortgage banking and title noninterest income Loans held for sale $ (1) $ (4) $ — $ (10)
Summary Of Book Value And Estimated Fair Value Of Financial Instruments	The following table summarizes the book value and estimated fair value of financial instruments recorded in the Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022: BOOK VALUE AND ESTIMATED FAIR VALUE OF FINANCIAL INSTRUMENTS September 30, 2023 Book Fair Value (Dollars in millions) Level 1 Level 2 Level 3 Total Assets: Loans and leases, net of allowance for loan and lease losses Commercial: Commercial, financial and industrial $ 32,828 $ — $ — $ 32,205 $ 32,205 Commercial real estate 13,952 — — 13,661 13,661 Consumer: Consumer real estate 13,457 — — 12,480 12,480 Credit card and other 781 — — 755 755 Total loans and leases, net of allowance for loan and lease losses 61,018 — — 59,101 59,101 Short-term financial assets: Interest-bearing deposits with banks 1,917 1,917 — — 1,917 Federal funds sold 53 — 53 — 53 Securities purchased under agreements to resell 363 — 363 — 363 Total short-term financial assets 2,333 1,917 416 — 2,333 Trading securities (a) 1,231 — 1,208 23 1,231 Loans held for sale: Mortgage loans (elected fair value) (a) 88 — 67 21 88 USDA & SBA loans - LOCOM 496 — 500 — 500 Mortgage loans - LOCOM 29 — — 29 29 Total loans held for sale 613 — 567 50 617 Securities available for sale (a) 8,100 — 8,100 — 8,100 Securities held to maturity 1,335 — 1,104 — 1,104 Derivative assets (a) 863 10 853 — 863 Other assets: Tax credit investments 578 — — 570 570 Deferred compensation mutual funds 99 99 — — 99 Equity, mutual funds, and other (b) 277 23 — 254 277 Total other assets 954 122 — 824 946 Total assets $ 76,447 $ 2,049 $ 12,248 $ 59,998 $ 74,295 Liabilities: Defined maturity deposits $ 7,783 $ — $ 7,830 $ — $ 7,830 Trading liabilities (a) 366 — 366 — 366 Short-term financial liabilities: Federal funds purchased 309 — 309 — 309 Securities sold under agreements to repurchase 1,706 — 1,706 — 1,706 Other short-term borrowings 492 — 492 — 492 Total short-term financial liabilities 2,507 — 2,507 — 2,507 Term borrowings: Real estate investment trust-preferred 46 — — 47 47 Term borrowings—new market tax credit investment 65 — — 59 59 Secured borrowings 12 — — 12 12 Junior subordinated debentures 150 — — 150 150 Other long-term borrowings 884 — 809 — 809 Total term borrowings 1,157 — 809 268 1,077 Derivative liabilities (a) 1,102 8 1,068 26 1,102 Total liabilities $ 12,915 $ 8 $ 12,580 $ 294 $ 12,882 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 1 primarily consists of mutual funds with readily determinable fair values. Level 3 includes restricted investments in FHLB-Cincinnati stock of $51 million and FRB stock of $203 million. December 31, 2022 Book Fair Value (Dollars in millions) Level 1 Level 2 Level 3 Total Assets: Loans and leases and allowance for loan and lease losses Commercial: Commercial, financial and industrial $ 31,473 $ — $ — $ 31,329 $ 31,329 Commercial real estate 13,082 — — 12,909 12,909 Consumer: Consumer real estate 12,053 — — 11,934 11,934 Credit card and other 809 — — 810 810 Total loans and leases, net of allowance for loan and lease losses 57,417 — — 56,982 56,982 Short-term financial assets: Interest-bearing deposits with banks 1,384 1,384 — — 1,384 Federal funds sold 129 — 129 — 129 Securities purchased under agreements to resell 353 — 353 — 353 Total short-term financial assets 1,866 1,384 482 — 1,866 Trading securities (a) 1,375 — 1,350 25 1,375 Loans held for sale: Mortgage loans (elected fair value) (a) 51 — 29 22 51 USDA & SBA loans - LOCOM 506 — 512 — 512 Mortgage loans - LOCOM 33 — — 33 33 Total loans held for sale 590 — 541 55 596 Securities available for sale (a) 8,836 — 8,836 — 8,836 Securities held to maturity 1,371 — 1,209 — 1,209 Derivative assets (a) 460 9 451 — 460 Other assets: Tax credit investments 547 — — 542 542 Deferred compensation mutual funds 112 112 — — 112 Equity, mutual funds, and other (b) 275 22 — 253 275 Total other assets 934 134 — 795 929 Total assets $ 72,849 $ 1,527 $ 12,869 $ 57,857 $ 72,253 Liabilities: Defined maturity deposits $ 2,887 $ — $ 2,890 $ — $ 2,890 Trading liabilities (a) 335 — 335 — 335 Short-term financial liabilities: Federal funds purchased 400 — 400 — 400 Securities sold under agreements to repurchase 1,013 — 1,013 — 1,013 Other short-term borrowings 1,093 — 1,093 — 1,093 Total short-term financial liabilities 2,506 — 2,506 — 2,506 Term borrowings: Real estate investment trust-preferred 46 — — 47 47 Term borrowings—new market tax credit investment 66 — — 59 59 Secured borrowings 3 — — 3 3 Junior subordinated debentures 148 — — 150 150 Other long-term borrowings 1,334 — 1,301 — 1,301 Total term borrowings 1,597 — 1,301 259 1,560 Derivative liabilities (a) 958 8 923 27 958 Total liabilities $ 8,283 $ 8 $ 7,955 $ 286 $ 8,249 (a) Classes are detailed in the recurring and nonrecurring measurement tables. (b) Level 1 primarily consists of mutual funds with readily determinable fair values. Level 3 includes restricted investments in FHLB-Cincinnati stock of $50 million and FRB stock of $203 million. The following table presents the contractual amount and fair value of unfunded loan commitments and standby and other commitments as of September 30, 2023 and December 31, 2022: UNFUNDED COMMITMENTS Contractual Amount Fair Value (Dollars in millions) September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Unfunded Commitments: Loan commitments $ 25,402 $ 25,953 $ 2 $ 1 Standby and other commitments 728 754 7 7

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Details) - USD ($)		3 Months Ended		9 Months Ended
	May 04, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Jan. 01, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Allowance for loan and lease losses		$ (760,000,000)	$ (664,000,000)	$ (760,000,000)	$ (664,000,000)	$ (737,000,000)		$ (685,000,000)	$ (624,000,000)	$ (670,000,000)
Retained earnings		3,874,000,000		3,874,000,000				3,430,000,000
Accounting Standards Update 2022-02
Business Acquisition [Line Items]
Allowance for loan and lease losses							$ 6,000,000	$ 6,000,000
Retained earnings							$ 4,000,000
TD Transaction
Business Acquisition [Line Items]
Proceeds from merger contract termination	$ 200,000,000
Fee reimbursement received	$ 25,000,000
Merger and integration expense		$ 0	$ 21,000,000	$ 51,000,000	$ 55,000,000

Investment Securities - Schedul

Investment Securities - Schedule Of FHN's Investment Securities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 9,648
Securities available for sale at fair value	8,100	$ 8,836
Securities held to maturity (fair value of $1,104 and $1,209, respectively)	1,335	1,371
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(231)	(162)
Fair Value	1,104	1,209
Government agency issued MBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,156	5,457
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(831)	(695)
Securities available for sale at fair value	4,325	4,763
Securities held to maturity (fair value of $1,104 and $1,209, respectively)	863	897
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(143)	(109)
Fair Value	720	788
Government agency issued CMO
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,528	2,682
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(428)	(369)
Securities available for sale at fair value	2,100	2,313
Securities held to maturity (fair value of $1,104 and $1,209, respectively)	472	474
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(88)	(53)
Fair Value	384	421
Other U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,334	1,325
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(206)	(162)
Securities available for sale at fair value	1,128	1,163
States and municipalities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	630	658
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(83)	(62)
Securities available for sale at fair value	547	597
Securities available-for-sale, excluding interest only strip
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,648	10,122
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(1,548)	(1,288)
Securities available for sale at fair value	8,100	8,836
Securities available-for-sale, excluding interest only strip \| Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 8,400	$ 6,500

Investment Securities - Sched_2

Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Within 1 year	$ 0
After 1 year through 5 years	0
After 5 years through 10 years	0
After 10 years	0
Subtotal	0
Government agency issued MBS and CMO	1,335
Total	1,335
Fair Value
Within 1 year	0
After 1 year through 5 years	0
After 5 years through 10 years	0
After 10 years	0
Subtotal	0
Government agency issued MBS and CMO	1,104
Fair Value	1,104	$ 1,209
Amortized Cost
Within 1 year	14
After 1 year through 5 years	125
After 5 years through 10 years	394
After 10 years	1,431
Subtotal	1,964
Government agency issued MBS and CMO	7,684
Securities available for sale, amortized cost	9,648
Fair Value
Within 1 year	14
After 1 year through 5 years	118
After 5 years through 10 years	341
After 10 years	1,202
Subtotal	1,675
Government agency issued MBS and CMO	6,425
Securities available-for-sale	$ 8,100	$ 8,836

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
Investment Securities - Narrative (Details) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Marketable Securities [Abstract]
Gains (losses) on available-for-sale securities	$ 0	$ 0	$ 0	$ 0
Available-for-sale, accrued interest, after allowance for credit loss	29,000,000		29,000,000		$ 32,000,000
Transfers between available for sale and held to maturity debt securities	0		0
Held-to-maturity, accrued interest, after allowance for credit loss	3,000,000		3,000,000		3,000,000
Allowance for credit loss	0		0		0
Carrying amount of equity investments without a readily determinable fair value	87,000,000		87,000,000		$ 79,000,000
Unrealized gains (losses) for equity investments with readily determinable fair values	$ 1,000,000	$ (2,000,000)	$ 7,000,000	$ (15,000,000)

Investment Securities - Sched_3

Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Less than 12 months	$ 664	$ 4,554
12 months or longer	7,423	4,037
Total fair value	8,087	8,591
Unrealized Losses
Less than 12 months	(36)	(487)
12 months or longer	(1,512)	(801)
Total unrealized losses	(1,548)	(1,288)
Government agency issued MBS
Schedule of Investments [Line Items]
Less than 12 months	258	2,314
12 months or longer	4,066	2,350
Total fair value	4,324	4,664
Unrealized Losses
Less than 12 months	(14)	(249)
12 months or longer	(817)	(446)
Total unrealized losses	(831)	(695)
Government agency issued CMO
Schedule of Investments [Line Items]
Less than 12 months	53	1,104
12 months or longer	2,047	1,209
Total fair value	2,100	2,313
Unrealized Losses
Less than 12 months	(4)	(123)
12 months or longer	(424)	(246)
Total unrealized losses	(428)	(369)
Other U.S. government agencies
Schedule of Investments [Line Items]
Less than 12 months	256	643
12 months or longer	871	424
Total fair value	1,127	1,067
Unrealized Losses
Less than 12 months	(12)	(67)
12 months or longer	(194)	(95)
Total unrealized losses	(206)	(162)
States and municipalities
Schedule of Investments [Line Items]
Less than 12 months	97	493
12 months or longer	439	54
Total fair value	536	547
Unrealized Losses
Less than 12 months	(6)	(48)
12 months or longer	(77)	(14)
Total unrealized losses	$ (83)	$ (62)

Loans and Leases - Narrative (D

Loans and Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 276	$ 276		$ 226
Net loans and leases	61,018	61,018		57,417
Loans and leases	$ 61,778	61,778		58,102
Allowance for credit loss, writeoff, collateral		1	$ 2
Post-Modification Outstanding Recorded Investment		$ 21		85
TDR loans balance				180
Loans Held For Sale, Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR loans balance				30
Commercial: \| Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	1	1
Commercial: \| Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loan grades	16	16
Commercial: \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 33,163	$ 33,163		31,781
Commercial: \| Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121	14,121		13,228
Loans to mortgage companies \| Commercial: \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 2,237	$ 2,237		2,258
Percentage contributed	20%	20%
Finance And Insurance Companies \| Commercial: \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 4,200	$ 4,200
C&I \| Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	245	245		124
C&I \| Commercial: \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	30,926	30,926		29,523
Post-Modification Outstanding Recorded Investment				24
C&I \| Commercial: \| Commercial and industrial \| Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	120	120
CRE \| Commercial: \| Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121	14,121		13,228
CRE \| Commercial: \| Commercial real estate \| Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	125	125
Asset Pledged as Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net loans and leases	47,800	47,800		38,300
Asset Pledged as Collateral \| C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, allowance for credit loss, writeoff, collateral	82	106
Asset Pledged as Collateral \| HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	6	6		7
Asset Pledged as Collateral \| Real estate installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 28	$ 28		$ 26

Loans and Leases - Schedule Of

Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 61,778		$ 58,102
Allowance for loan and lease losses	(760)	$ (737)	(685)	$ (664)	$ (624)	$ (670)
Net loans and leases	61,018		57,417
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	1,200		1,100
Commercial: \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	30,926		29,523
Commercial: \| Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	2,237		2,258
Commercial: \| Commercial, financial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	33,163		31,781
Allowance for loan and lease losses	(335)	(326)	(308)	(295)	(274)	(334)
Commercial: \| Commercial, financial and industrial \| Paycheck Protection Plan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	35		76	129
Commercial: \| Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121		13,228
Allowance for loan and lease losses	(169)	(159)	(146)	(148)	(141)	(154)
Commercial: \| Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	187		193
Consumer:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,685		12,253
Consumer: \| HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	2,248		2,028
Consumer: \| Real estate installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	11,437		10,225
Consumer: \| Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	809		840
Allowance for loan and lease losses	$ (28)	$ (31)	$ (31)	$ (28)	$ (26)	$ (19)

Loans and Leases - Balances Of

Loans and Leases - Balances Of Commercial Loan Portfolio Classes, Disaggregated By PD Grade (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 61,778	$ 58,102
Commercial and industrial \| Commercial:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	3,352	7,509
Financing receivable, originated year two	6,099	3,738
Financing receivable, originated year three	3,912	1,861
Financing receivable, originated year four	1,812	2,071
Financing receivable, originated year five	1,911	1,145
Financing receivable, originated prior to year five	3,790	3,305
LMC	2,237	2,258
Revolving Loans	9,588	9,426
Revolving Loans Converted to Term Loans	462	468
Loans and leases	33,163	31,781
Commercial and industrial \| PD Grade 1 -12 \| Commercial:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	3,351	7,456
Financing receivable, originated year two	5,945	3,634
Financing receivable, originated year three	3,796	1,803
Financing receivable, originated year four	1,710	1,912
Financing receivable, originated year five	1,772	1,112
Financing receivable, originated prior to year five	3,634	3,170
LMC	2,237	2,258
Revolving Loans	9,302	9,166
Revolving Loans Converted to Term Loans	358	371
Loans and leases	32,105	30,882
Commercial and industrial \| PD Grade 13 \| Commercial:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1	17
Financing receivable, originated year two	31	56
Financing receivable, originated year three	54	17
Financing receivable, originated year four	53	125
Financing receivable, originated year five	100	8
Financing receivable, originated prior to year five	60	80
LMC	0	0
Revolving Loans	139	126
Revolving Loans Converted to Term Loans	1	0
Loans and leases	439	429
Commercial and industrial \| PD Grade 14 ,15 and 16 \| Commercial:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	0	36
Financing receivable, originated year two	123	48
Financing receivable, originated year three	62	41
Financing receivable, originated year four	49	34
Financing receivable, originated year five	39	25
Financing receivable, originated prior to year five	96	55
LMC	0	0
Revolving Loans	147	134
Revolving Loans Converted to Term Loans	103	97
Loans and leases	619	470
Commercial real estate \| Commercial:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121	13,228
Commercial real estate \| Commercial: \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	664	2,638
Financing receivable, originated year two	3,358	3,331
Financing receivable, originated year three	3,651	1,503
Financing receivable, originated year four	1,347	1,942
Financing receivable, originated year five	1,619	907
Financing receivable, originated prior to year five	3,139	2,601
Revolving Loans	324	286
Revolving Loans Converted to Term Loans	19	20
Loans and leases	14,121	13,228
Commercial real estate \| PD Grade 1 -12 \| Commercial: \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	663	2,637
Financing receivable, originated year two	3,355	3,324
Financing receivable, originated year three	3,643	1,488
Financing receivable, originated year four	1,306	1,855
Financing receivable, originated year five	1,331	808
Financing receivable, originated prior to year five	2,978	2,565
Revolving Loans	316	274
Revolving Loans Converted to Term Loans	19	20
Loans and leases	13,611	12,971
Commercial real estate \| PD Grade 13 \| Commercial: \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1	0
Financing receivable, originated year two	1	3
Financing receivable, originated year three	3	3
Financing receivable, originated year four	30	37
Financing receivable, originated year five	147	68
Financing receivable, originated prior to year five	77	5
Revolving Loans	0	1
Revolving Loans Converted to Term Loans	0	0
Loans and leases	259	117
Commercial real estate \| PD Grade 14 ,15 and 16 \| Commercial: \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	0	1
Financing receivable, originated year two	2	4
Financing receivable, originated year three	5	12
Financing receivable, originated year four	11	50
Financing receivable, originated year five	141	31
Financing receivable, originated prior to year five	84	31
Revolving Loans	8	11
Revolving Loans Converted to Term Loans	0	0
Loans and leases	$ 251	$ 140

Loans and Leases - Loans by FIC

Loans and Leases - Loans by FICO Score (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 61,778	$ 58,102
Consumer:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,685	12,253
Consumer: \| Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1,920	2,938
Financing receivable, originated year two	2,868	2,479
Financing receivable, originated year three	2,336	1,175
Financing receivable, originated year four	1,072	784
Financing receivable, originated year five	719	452
Financing receivable, originated prior to year five	2,522	2,397
Revolving Loans	2,123	1,877
Revolving Loans Converted to Term Loans	125	151
Loans and leases	13,685	12,253
Consumer: \| Consumer real estate \| FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1,425	2,154
Financing receivable, originated year two	2,110	1,847
Financing receivable, originated year three	1,750	819
Financing receivable, originated year four	748	523
Financing receivable, originated year five	475	278
Financing receivable, originated prior to year five	1,398	1,294
Revolving Loans	1,542	1,297
Revolving Loans Converted to Term Loans	53	63
Loans and leases	9,501	8,275
Consumer: \| Consumer real estate \| FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	180	292
Financing receivable, originated year two	287	246
Financing receivable, originated year three	230	116
Financing receivable, originated year four	110	98
Financing receivable, originated year five	90	34
Financing receivable, originated prior to year five	239	238
Revolving Loans	189	183
Revolving Loans Converted to Term Loans	16	18
Loans and leases	1,341	1,225
Consumer: \| Consumer real estate \| FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	132	242
Financing receivable, originated year two	234	206
Financing receivable, originated year three	195	93
Financing receivable, originated year four	87	55
Financing receivable, originated year five	52	35
Financing receivable, originated prior to year five	230	226
Revolving Loans	157	142
Revolving Loans Converted to Term Loans	18	22
Loans and leases	1,105	1,021
Consumer: \| Consumer real estate \| FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	162	214
Financing receivable, originated year two	200	137
Financing receivable, originated year three	119	90
Financing receivable, originated year four	83	55
Financing receivable, originated year five	53	62
Financing receivable, originated prior to year five	303	278
Revolving Loans	175	192
Revolving Loans Converted to Term Loans	19	23
Loans and leases	1,114	1,051
Consumer: \| Consumer real estate \| FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	9	21
Financing receivable, originated year two	20	24
Financing receivable, originated year three	23	25
Financing receivable, originated year four	24	41
Financing receivable, originated year five	37	20
Financing receivable, originated prior to year five	112	105
Revolving Loans	37	47
Revolving Loans Converted to Term Loans	7	9
Loans and leases	269	292
Consumer: \| Consumer real estate \| FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	12	15
Financing receivable, originated year two	17	19
Financing receivable, originated year three	19	32
Financing receivable, originated year four	20	12
Financing receivable, originated year five	12	23
Financing receivable, originated prior to year five	240	256
Revolving Loans	23	16
Revolving Loans Converted to Term Loans	12	16
Loans and leases	355	389
Consumer: \| Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	64	53
Financing receivable, originated year two	48	30
Financing receivable, originated year three	27	21
Financing receivable, originated year four	17	23
Financing receivable, originated year five	20	13
Financing receivable, originated prior to year five	162	114
Revolving Loans	460	576
Revolving Loans Converted to Term Loans	11	10
Loans and leases	809	840
Consumer: \| Credit Card and Other \| FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	43	36
Financing receivable, originated year two	29	14
Financing receivable, originated year three	13	10
Financing receivable, originated year four	6	10
Financing receivable, originated year five	4	4
Financing receivable, originated prior to year five	34	25
Revolving Loans	223	291
Revolving Loans Converted to Term Loans	5	6
Loans and leases	357	396
Consumer: \| Credit Card and Other \| FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	5	3
Financing receivable, originated year two	3	2
Financing receivable, originated year three	2	2
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	0
Financing receivable, originated prior to year five	5	4
Revolving Loans	27	30
Revolving Loans Converted to Term Loans	1	1
Loans and leases	45	43
Consumer: \| Credit Card and Other \| FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	4	3
Financing receivable, originated year two	3	3
Financing receivable, originated year three	4	1
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	0
Financing receivable, originated prior to year five	5	4
Revolving Loans	23	33
Revolving Loans Converted to Term Loans	3	1
Loans and leases	44	46
Consumer: \| Credit Card and Other \| FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	2	3
Financing receivable, originated year two	3	2
Financing receivable, originated year three	1	1
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	2
Financing receivable, originated prior to year five	8	7
Revolving Loans	19	30
Revolving Loans Converted to Term Loans	1	1
Loans and leases	36	47
Consumer: \| Credit Card and Other \| FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1	1
Financing receivable, originated year two	1	3
Financing receivable, originated year three	1	1
Financing receivable, originated year four	0	0
Financing receivable, originated year five	0	0
Financing receivable, originated prior to year five	3	3
Revolving Loans	6	18
Revolving Loans Converted to Term Loans	0	0
Loans and leases	12	26
Consumer: \| Credit Card and Other \| FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	9	7
Financing receivable, originated year two	9	6
Financing receivable, originated year three	6	6
Financing receivable, originated year four	8	10
Financing receivable, originated year five	13	7
Financing receivable, originated prior to year five	107	71
Revolving Loans	162	174
Revolving Loans Converted to Term Loans	1	1
Loans and leases	$ 315	$ 282

Loans and Leases - Accruing And

Loans and Leases - Accruing And Non-Accruing Loans By Class (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	$ 61,292	$ 57,648
Total Accruing	61,384	57,786
Current, non-accruing	202	160
Total Non- Accruing	394	316
Loans and leases	61,778	58,102
30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	75	105
Past due, non-accruing	64	19
90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	17	33
Past due, non-accruing	128	137
Commercial: \| Commercial, financial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	33,009	31,567
Total Accruing	33,040	31,628
Current, non-accruing	78	64
Total Non- Accruing	123	153
Loans and leases	33,163	31,781
Commercial: \| Commercial, financial and industrial \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	28	50
Past due, non-accruing	2	10
Commercial: \| Commercial, financial and industrial \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	3	11
Past due, non-accruing	43	79
Commercial: \| Commercial, financial and industrial \| C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	30,772	29,309
Total Accruing	30,803	29,370
Current, non-accruing	78	64
Total Non- Accruing	123	153
Loans and leases	30,926	29,523
Nonaccrual, no allowance	108	147
Commercial: \| Commercial, financial and industrial \| C&I \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	28	50
Past due, non-accruing	2	10
Commercial: \| Commercial, financial and industrial \| C&I \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	3	11
Past due, non-accruing	43	79
Commercial: \| Commercial, financial and industrial \| Loans to mortgage companies
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	2,237	2,258
Total Accruing	2,237	2,258
Current, non-accruing	0	0
Total Non- Accruing	0	0
Loans and leases	2,237	2,258
Commercial: \| Commercial, financial and industrial \| Loans to mortgage companies \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	0	0
Past due, non-accruing	0	0
Commercial: \| Commercial, financial and industrial \| Loans to mortgage companies \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	0	0
Past due, non-accruing	0	0
Commercial: \| Commercial, financial and industrial \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual, no allowance	117	5
Commercial: \| Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121	13,228
Commercial: \| Commercial real estate \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,121	13,228
Commercial: \| Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	187	193
Commercial real estate \| Commercial real estate \| CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	13,992	13,208
Total Accruing	13,996	13,219
Current, non-accruing	43	7
Total Non- Accruing	125	9
Loans and leases	14,121	13,228
Commercial real estate \| Commercial real estate \| CRE \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	4	11
Past due, non-accruing	50	0
Commercial real estate \| Commercial real estate \| CRE \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	0	0
Past due, non-accruing	32	2
Consumer:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,685	12,253
Consumer: \| Consumer Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	13,492	12,046
Total Accruing	13,541	12,101
Current, non-accruing	79	88
Total Non- Accruing	144	152
Loans and leases	13,685	12,253
Consumer: \| Consumer Real Estate \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	38	37
Past due, non-accruing	12	9
Consumer: \| Consumer Real Estate \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	11	18
Past due, non-accruing	53	55
Consumer: \| Consumer Real Estate \| HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	2,185	1,967
Total Accruing	2,203	1,984
Current, non-accruing	32	32
Total Non- Accruing	45	44
Loans and leases	2,248	2,028
Nonaccrual, no allowance	5	5
Consumer: \| Consumer Real Estate \| HELOC \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	13	12
Past due, non-accruing	4	4
Consumer: \| Consumer Real Estate \| HELOC \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	5	5
Past due, non-accruing	9	8
Consumer: \| Consumer Real Estate \| Real estate installment loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	11,307	10,079
Total Accruing	11,338	10,117
Current, non-accruing	47	56
Total Non- Accruing	99	108
Loans and leases	11,437	10,225
Nonaccrual, no allowance	10	7
Consumer: \| Consumer Real Estate \| Real estate installment loans \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	25	25
Past due, non-accruing	8	5
Consumer: \| Consumer Real Estate \| Real estate installment loans \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	6	13
Past due, non-accruing	44	47
Consumer: \| Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	799	827
Total Accruing	807	838
Current, non-accruing	2	1
Total Non- Accruing	2	2
Loans and leases	809	840
Consumer: \| Credit Card and Other \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	5	7
Past due, non-accruing	0	0
Consumer: \| Credit Card and Other \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	3	4
Past due, non-accruing	0	1
Consumer: \| Credit Card and Other \| Credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	274	287
Total Accruing	281	296
Current, non-accruing	0	0
Total Non- Accruing	0	0
Loans and leases	281	296
Consumer: \| Credit Card and Other \| Credit card \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	4	5
Past due, non-accruing	0	0
Consumer: \| Credit Card and Other \| Credit card \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	3	4
Past due, non-accruing	0	0
Consumer: \| Credit Card and Other \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current, accruing	525	540
Total Accruing	526	542
Current, non-accruing	2	1
Total Non- Accruing	2	2
Loans and leases	528	544
Consumer: \| Credit Card and Other \| Other \| 30-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	1	2
Past due, non-accruing	0	0
Consumer: \| Credit Card and Other \| Other \| 90+ Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due, accruing	0	0
Past due, non-accruing	$ 0	$ 1

Loans and Leases - Modification

Loans and Leases - Modifications to Borrowers Experiencing Financial Difficulty (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 1
% of Total Class	0%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 125
% of Total Class	0.20%
Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 1
% of Total Class	0%
Payment Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 3
% of Total Class	0%
Combination - Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 5
% of Total Class	0%
Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 2
% of Total Class	0%
Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 16
% of Total Class	0%
Commercial: \| Commercial and industrial \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial and industrial \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 81
% of Total Class	0.20%
Weighted average life of loans	1 year
Commercial: \| Commercial and industrial \| Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial and industrial \| Payment Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial and industrial \| Combination - Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial and industrial \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 2
% of Total Class	0%
Weighted average life of loans	3 years 8 months 12 days
Interest forgiveness	$ 1
Commercial: \| Commercial and industrial \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness \| Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	11.25%
Commercial: \| Commercial and industrial \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness \| Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	7.50%
Commercial: \| Commercial and industrial \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 42
% of Total Class	0.30%
Weighted average life of loans	1 year
Commercial: \| Commercial real estate \| Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Payment Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Combination - Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Commercial: \| Commercial real estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 16
% of Total Class	0.10%
Weighted average life of loans	1 year
Deferred interest	$ 1
Commercial: \| Commercial real estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals \| Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	8.65%
Commercial: \| Commercial real estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals \| Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	8%
Consumer: \| Consumer Real Estate \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 1
% of Total Class	0%
Consumer: \| Consumer Real Estate \| Interest Rate Reduction \| Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	8.60%
Consumer: \| Consumer Real Estate \| Interest Rate Reduction \| Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	5%
Consumer: \| Consumer Real Estate \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 2
% of Total Class	0%
Weighted average life of loans	10 years
Consumer: \| Consumer Real Estate \| Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 1
% of Total Class	0%
Decrease from loan modification	$ 1.3
Consumer: \| Consumer Real Estate \| Payment Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 3
% of Total Class	0%
Weighted average life of loans	11 months
Consumer: \| Consumer Real Estate \| Combination - Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 5
% of Total Class	0%
Weighted average life of loans	13 years 6 months
Consumer: \| Consumer Real Estate \| Combination - Term Extension and Interest Rate Reduction \| Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	5.60%
Consumer: \| Consumer Real Estate \| Combination - Term Extension and Interest Rate Reduction \| Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	4.80%
Consumer: \| Consumer Real Estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Consumer Real Estate \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Interest Rate Reduction \| Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	13.30%
Consumer: \| Credit Card and Other \| Interest Rate Reduction \| Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average interest rate of loans	0%
Consumer: \| Credit Card and Other \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Payment Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Combination - Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Combination - Term Extension, Interest Rate Reduction, and Interest Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%
Consumer: \| Credit Card and Other \| Combination - Term Extension, Interest Rate Reduction, and Interest Deferrals
Financing Receivable, Troubled Debt Restructuring [Line Items]
Balance	$ 0
% of Total Class	0%

Loans and Leases - Performance

Loans and Leases - Performance Of Loans That Have Been Modified In The Last 12 Months (Details) $ in Millions	Sep. 30, 2023 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-Accruing	$ 66
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	87
30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Commercial: \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-Accruing	6
Commercial: \| Commercial and industrial \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	77
Commercial: \| Commercial and industrial \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Commercial: \| Commercial and industrial \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Commercial: \| Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-Accruing	50
Commercial: \| Commercial real estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	8
Commercial: \| Commercial real estate \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Commercial: \| Commercial real estate \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Consumer: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-Accruing	10
Consumer: \| Consumer Real Estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	2
Consumer: \| Consumer Real Estate \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Consumer: \| Consumer Real Estate \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Consumer: \| Credit Card and Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non-Accruing	0
Consumer: \| Credit Card and Other \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Consumer: \| Credit Card and Other \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	0
Consumer: \| Credit Card and Other \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans	$ 0

Loans and Leases - Schedule O_2

Loans and Leases - Schedule Of Troubled Debt Restructurings Occurring During The Year (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		367
Pre-Modification Outstanding Recorded Investment		$ 91
Post-Modification Outstanding Recorded Investment	$ 21	$ 85
Consumer: \| Credit card and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		81
Pre-Modification Outstanding Recorded Investment		$ 12
Post-Modification Outstanding Recorded Investment		$ 12
C&I \| Commercial: \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		6
Pre-Modification Outstanding Recorded Investment		$ 30
Post-Modification Outstanding Recorded Investment		$ 24
CRE \| Commercial: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		1
Pre-Modification Outstanding Recorded Investment		$ 1
Post-Modification Outstanding Recorded Investment		$ 1
HELOC \| Consumer: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		98
Pre-Modification Outstanding Recorded Investment		$ 7
Post-Modification Outstanding Recorded Investment		$ 7
Real estate installment loans \| Consumer: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan		181
Pre-Modification Outstanding Recorded Investment		$ 41
Post-Modification Outstanding Recorded Investment		$ 41

Loans and Leases - Schedule O_3

Loans and Leases - Schedule Of Troubled Debt Restructurings Within The Previous 12 Months (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	98
Recorded Investment \| $	$ 16
Consumer: \| Credit card and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	17
Recorded Investment \| $	$ 0
C&I \| Commercial: \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	5
Recorded Investment \| $	$ 0
CRE \| Commercial: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	0
Recorded Investment \| $	$ 0
HELOC \| Consumer: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	22
Recorded Investment \| $	$ 1
Real estate installment loans \| Consumer: \| Consumer Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number \| loan	54
Recorded Investment \| $	$ 15

Allowance for Credit Losses - R

Allowance for Credit Losses - Rollforward of Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 737	$ 624	$ 685	$ 670	$ 670
Charge-offs	(104)	(21)	(159)	(61)
Recoveries	9	9	25	27
Ending balance	760	664	760	664	$ 685
Accounting Standards Update [Extensible List]					Accounting Standards Update 2022-02
Loans and leases	61,778		61,778		$ 58,102
Accounting Standards Update 2022-02
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(6)
Ending balance					(6)
Funded And Unfunded Loan Commitments
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	842	752	842	752
Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	118	52	215	28
Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	90	80	87	66	66
Provision for loan and lease losses	(8)	8	(5)	22
Ending balance	82	88	82	88	87
Commercial: \| Commercial, financial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	326	274	308	334	334
Charge-offs	(91)	(13)	(124)	(38)
Recoveries	5	2	12	6
Ending balance	335	295	335	295	308
Loans and leases	33,163		33,163		31,781
Commercial: \| Commercial, financial and industrial \| Single Company
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs			(72)
Commercial: \| Commercial, financial and industrial \| Accounting Standards Update 2022-02
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			1
Ending balance					1
Commercial: \| Commercial, financial and industrial \| Paycheck Protection Plan
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases	35	129	35	129	76
Commercial: \| Commercial, financial and industrial \| Funded And Unfunded Loan Commitments
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	384	353	384	353
Commercial: \| Commercial, financial and industrial \| Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	95	32	138	(7)
Commercial: \| Commercial, financial and industrial \| Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	55	53	55	46	46
Provision for loan and lease losses	(6)	5	(6)	12
Ending balance	49	58	49	58	55
Commercial: \| Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	159	141	146	154	154
Charge-offs	(5)	(1)	(15)	(1)
Recoveries	1	0	2	1
Ending balance	169	148	169	148	146
Loans and leases	14,121		14,121		13,228
Commercial: \| Commercial Real Estate \| Accounting Standards Update 2022-02
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			0
Ending balance					0
Commercial: \| Commercial Real Estate \| Funded And Unfunded Loan Commitments
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	190	167	190	167
Commercial: \| Commercial Real Estate \| Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	14	8	36	(6)
Commercial: \| Commercial Real Estate \| Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	24	17	22	12	12
Provision for loan and lease losses	(3)	2	(1)	7
Ending balance	21	19	21	19	22
Commercial: \| Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases	187		187		193
Consumer:
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases	13,685		13,685		12,253
Consumer: \| Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	221	183	200	163	163
Charge-offs	(1)	(1)	(3)	(4)
Recoveries	2	6	7	17
Ending balance	228	193	228	193	200
Loans and leases	13,685		13,685		12,253
Consumer: \| Consumer Real Estate \| Accounting Standards Update 2022-02
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			(7)
Ending balance					(7)
Consumer: \| Consumer Real Estate \| Funded And Unfunded Loan Commitments
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	240	204	240	204
Consumer: \| Consumer Real Estate \| Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	6	5	31	17
Consumer: \| Consumer Real Estate \| Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11	10	10	8	8
Provision for loan and lease losses	1	1	2	3
Ending balance	12	11	12	11	10
Consumer: \| Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	31	26	31	19	19
Charge-offs	(7)	(6)	(17)	(18)
Recoveries	1	1	4	3
Ending balance	28	28	28	28	31
Loans and leases	809		809		840
Consumer: \| Credit Card and Other \| Accounting Standards Update 2022-02
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			0
Ending balance					0
Consumer: \| Credit Card and Other \| Funded And Unfunded Loan Commitments
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance	28	28	28	28
Consumer: \| Credit Card and Other \| Funded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Provision for loan and lease losses	3	7	10	24
Consumer: \| Credit Card and Other \| Unfunded commitment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0	0
Provision for loan and lease losses	0	0	0	0
Ending balance	$ 0	$ 0	$ 0	$ 0	$ 0

Allowance for Credit Losses - G

Allowance for Credit Losses - Gross Charge-Offs by Year of Origination (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Year one, current fiscal year charge offs			$ 83
Year two, current fiscal year charge offs			13
Year three, current fiscal year charge offs			7
Year four, current fiscal year charge offs			5
Year five, current fiscal year charge offs			11
Prior year charge offs			30
Revolving loans charge offs			10
Total charge offs	$ 104	$ 21	159	$ 61
Commercial: \| Commercial, financial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Year one, current fiscal year charge offs			74
Year two, current fiscal year charge offs			13
Year three, current fiscal year charge offs			6
Year four, current fiscal year charge offs			4
Year five, current fiscal year charge offs			9
Prior year charge offs			13
Revolving loans charge offs			5
Total charge offs	91	13	124	38
Commercial: \| Commercial, financial and industrial \| Single Company
Allowance for Loan and Lease Losses [Roll Forward]
Total charge offs			72
Commercial: \| Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Year one, current fiscal year charge offs			0
Year two, current fiscal year charge offs			0
Year three, current fiscal year charge offs			0
Year four, current fiscal year charge offs			0
Year five, current fiscal year charge offs			2
Prior year charge offs			13
Revolving loans charge offs			0
Total charge offs	5	1	15	1
Consumer: \| Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Year one, current fiscal year charge offs			0
Year two, current fiscal year charge offs			0
Year three, current fiscal year charge offs			0
Year four, current fiscal year charge offs			1
Year five, current fiscal year charge offs			0
Prior year charge offs			2
Revolving loans charge offs			0
Total charge offs	1	1	3	4
Consumer: \| Credit Card and Other
Allowance for Loan and Lease Losses [Roll Forward]
Year one, current fiscal year charge offs			9
Year two, current fiscal year charge offs			0
Year three, current fiscal year charge offs			1
Year four, current fiscal year charge offs			0
Year five, current fiscal year charge offs			0
Prior year charge offs			2
Revolving loans charge offs			5
Total charge offs	$ 7	$ 6	$ 17	$ 18

Mortgage Banking Activity - Nar

Mortgage Banking Activity - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net loans and leases	$ 61,018		$ 61,018		$ 57,417
Mortgage banking and title income	7	$ 9	18	$ 65
Mortgage banking and title income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage banking and title income			3	$ 4
First Horizon Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net loans and leases	$ 35		$ 35

Mortgage Banking Activity - Res

Mortgage Banking Activity - Residential Mortgage Loans (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Balance at beginning of period	$ 590
Balance at end of period	613	$ 590
Mortgage loans
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Balance at beginning of period	44	250
Originations and purchases	512	1,275
Sales, net of gains	(475)	(1,481)
Balance at end of period	$ 81	$ 44

Mortgage Banking Activity - MSR

Mortgage Banking Activity - MSR Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Mortgage Banking [Abstract]
Gross Carrying Amount	$ 24	$ 21
Accumulated Amortization	(6)	(5)
Net Carrying Amount	$ 18	$ 16

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Summary of Goodwill by Reportable Segment (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,511	$ 1,511
Additions	0	0
Goodwill, ending balance	1,511	1,511
Regional Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	880	880
Additions	0	0
Goodwill, ending balance	880	880
Specialty Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	631	631
Additions	0	0
Goodwill, ending balance	$ 631	$ 631

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Intangible Assets and Accumulated Amortization Included in the Consolidated Statements of Condition (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Intangible Assets [Line Items]
Gross Carrying Amount	$ 427	$ 430
Accumulated Amortization	(229)	(196)
Net Carrying Value	198	234
Core deposit intangibles
Intangible Assets [Line Items]
Gross Carrying Amount	368	371
Accumulated Amortization	(199)	(171)
Net Carrying Value	169	200
Client relationships
Intangible Assets [Line Items]
Gross Carrying Amount	32	32
Accumulated Amortization	(15)	(13)
Net Carrying Value	17	19
Other
Intangible Assets [Line Items]
Gross Carrying Amount	27	27
Accumulated Amortization	(15)	(12)
Net Carrying Value	$ 12	$ 15

Preferred Stock - Non-Cumulativ

Preferred Stock - Non-Cumulative Perpetual Preferred Stock (Details) - USD ($) $ in Millions				9 Months Ended
	May 01, 2026	Aug. 01, 2025	May 01, 2024	Sep. 30, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)				26,750
Liquidation Amount				$ 538
Carrying Amount				$ 520	$ 1,014
Series B
Class of Stock [Line Items]
Annual Dividend Rate				6.625%
Preferred stock, shares outstanding (in shares)				8,000
Liquidation Amount				$ 80
Carrying Amount				$ 77	77
Series B \| SOFR \| Forecast
Class of Stock [Line Items]
Basis spread on variable rate		4.52361%
Series B \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage One
Class of Stock [Line Items]
Basis spread on variable rate		0.26161%
Series B \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage Two
Class of Stock [Line Items]
Basis spread on variable rate		4.262%
Series C
Class of Stock [Line Items]
Annual Dividend Rate				6.60%
Preferred stock, shares outstanding (in shares)				5,750
Liquidation Amount				$ 58
Carrying Amount				$ 59	59
Series C \| SOFR \| Forecast
Class of Stock [Line Items]
Basis spread on variable rate	5.18161%
Series C \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage One
Class of Stock [Line Items]
Basis spread on variable rate	0.26161%
Series C \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage Two
Class of Stock [Line Items]
Basis spread on variable rate	4.92%
Series D
Class of Stock [Line Items]
Annual Dividend Rate				6.10%
Preferred stock, shares outstanding (in shares)				10,000
Liquidation Amount				$ 100
Carrying Amount				$ 94	94
Series D \| SOFR \| Forecast
Class of Stock [Line Items]
Basis spread on variable rate			4.12061%
Series D \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage One
Class of Stock [Line Items]
Basis spread on variable rate			0.26161%
Series D \| SOFR \| Forecast \| Variable Rate Basis Spread, Percentage Two
Class of Stock [Line Items]
Basis spread on variable rate			3.859%
Series E
Class of Stock [Line Items]
Annual Dividend Rate				6.50%
Preferred stock, shares outstanding (in shares)				1,500
Liquidation Amount				$ 150
Carrying Amount				$ 145	145
Series F
Class of Stock [Line Items]
Annual Dividend Rate				4.70%
Preferred stock, shares outstanding (in shares)				1,500
Liquidation Amount				$ 150
Carrying Amount				$ 145	145
Series G
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)				0
Liquidation Amount				$ 0
Carrying Amount				$ 0	$ 494

Preferred Stock - Narrative (De

Preferred Stock - Narrative (Details) $ / shares in Units, $ in Millions			9 Months Ended
	Jun. 26, 2023 shares	Feb. 28, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) shares
Class of Stock [Line Items]
Carrying Amount			$ 520	$ 1,014
Preferred stock, shares issued (in shares) \| shares			26,750	31,686
Noncontrolling interest			$ 295	$ 295
Series G Convertible Preferred Stock \| TD Transaction
Class of Stock [Line Items]
Sale of preferred stock, net (approximately)		$ 494
Preferred stock convertible as a percent of outstanding shares		4.90%
Fixed rate of conversion (in shares)	4,000
Series G preferred stock conversion to common stock (in shares) \| shares	19,742,776
Series G
Class of Stock [Line Items]
Carrying Amount			$ 0	494
Preferred Class A
Class of Stock [Line Items]
Preferred stock, shares issued (in shares) \| shares			300,000
Preferred stock, liquidation preference per share (in dollars per share) \| $ / shares			$ 1,000
Annual dividend rate			3.75%
Noncontrolling interest			$ 295	$ 295
Preferred Class A \| SOFR
Class of Stock [Line Items]
Basis spread on variable rate			1.11161%
Preferred Class A \| SOFR \| Variable Rate Basis Spread, Percentage One
Class of Stock [Line Items]
Basis spread on variable rate			26.161%
Preferred Class A \| SOFR \| Variable Rate Basis Spread, Percentage Two
Class of Stock [Line Items]
Basis spread on variable rate			0.85%

Components of Other Comprehen_3

Components of Other Comprehensive Income (Loss) - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended												9 Months Ended
	Sep. 30, 2023		Jun. 30, 2023		Mar. 31, 2023		Sep. 30, 2022		Jun. 30, 2022		Mar. 31, 2022		Sep. 30, 2023		Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	$ 8,960		$ 8,895		$ 8,547		$ 8,551		$ 8,697		$ 8,494		$ 8,547		$ 8,494
Net unrealized gains (losses)	(239)						(471)						(258)		(1,152)
Amounts reclassified from AOCI	16						7						44		13
Other comprehensive income (loss)	(223)		(151)		160		(464)		(252)		(423)		(214)		(1,139)
Balance, end of period	8,793		8,960		8,895		8,283		8,551		8,697		8,793		8,283
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(1,359)	[1]	(1,208)	[1]	(1,368)	[1]	(963)	[2]	(711)	[2]	(288)	[2]	(1,368)	[1]	(288)	[2]
Other comprehensive income (loss)	(223)	[1]	(151)	[1]	160	[1]	(464)	[2]	(252)	[2]	(423)	[2]
Balance, end of period	(1,582)	[1]	(1,359)	[1]	(1,208)	[1]	(1,427)	[2]	(963)	[2]	(711)	[2]	(1,582)	[1]	(1,427)	[2]
Securities AFS
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(964)				(973)		(671)				(36)		(973)		(36)
Net unrealized gains (losses)	(206)						(368)						(197)		(1,003)
Amounts reclassified from AOCI	0						0						0		0
Other comprehensive income (loss)	(206)						(368)						(197)		(1,003)
Balance, end of period	(1,170)		(964)				(1,039)		(671)				(1,170)		(1,039)
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(129)				(127)		(40)				3		(127)		3
Net unrealized gains (losses)	(34)						(103)						(60)		(149)
Amounts reclassified from AOCI	14						4						38		7
Other comprehensive income (loss)	(20)						(99)						(22)		(142)
Balance, end of period	(149)		(129)				(139)		(40)				(149)		(139)
Pension and Post-retirement Plans
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	(266)				$ (268)		(252)				$ (255)		(268)		(255)
Net unrealized gains (losses)	1						0						(1)		0
Amounts reclassified from AOCI	2						3						6		6
Other comprehensive income (loss)	3						3						5		6
Balance, end of period	$ (263)		$ (266)				$ (249)		$ (252)				$ (263)		$ (249)

[1]Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.[2]Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of other comprehensive income (loss) have been attributed solely to FHN as the controlling interest holder.

Components of Other Comprehen_4

Components of Other Comprehensive Income (Loss) - Schedule of Reclassification from AOCI (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and fees on loans and leases	$ 941			$ 617			$ 2,624	$ 1,553
Income tax expense	52			78			223	183
Other expense	42			33			137	128
Amounts reclassified from AOCI	(142)	$ (329)	$ (255)	(268)	$ (177)	$ (198)	(727)	(642)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI	16			7			44	13
Reclassification out of Accumulated Other Comprehensive Income \| Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and fees on loans and leases	18			5			50	9
Income tax expense	(4)			(1)			(12)	(2)
Amounts reclassified from AOCI	14			4			38	7
Reclassification out of Accumulated Other Comprehensive Income \| Pension and Post-retirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax expense	(1)			(1)			(2)	(2)
Other expense	3			4			8	8
Amounts reclassified from AOCI	$ 2			$ 3			$ 6	$ 6

Earnings Per Share - Schedule O

Earnings Per Share - Schedule Of Reconciliation Of Net Income to Net Income Available to Common Shareholders (Details) $ / shares in Units, $ in Millions			3 Months Ended						9 Months Ended
	Jun. 26, 2023 shares	Feb. 28, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Net income			$ 142	$ 329	$ 255	$ 268	$ 177	$ 198	$ 727	$ 642
Net income attributable to noncontrolling interest			5			3			14	8
Net income attributable to controlling interest			137			265			713	634
Preferred stock dividends			8	$ 8	$ 8	8	$ 8	$ 8	24	24
Net income available to common shareholders			129			257			689	610
Net income available to common shareholders			$ 129			$ 257			$ 689	$ 610
Weighted average common shares outstanding - basic (in shares) \| shares			558,559,000			535,986,000			544,952,000	534,613,000
Effect of dilutive restricted stock, performance equity awards and options (in shares) \| shares			2,862,000			6,655,000			4,250,000	7,258,000
Effect of dilutive convertible preferred stock (in shares) \| shares			0			27,512,000			12,728,000	21,667,000
Weighted average common shares outstanding - diluted (in shares) \| shares			561,421,000			570,153,000			561,930,000	563,538,000
Basic earnings per common share (in dollars per share) \| $ / shares			$ 0.23			$ 0.48			$ 1.26	$ 1.14
Diluted earnings per common share (in dollars per share) \| $ / shares			$ 0.23			$ 0.45			$ 1.23	$ 1.08
TD Transaction \| Series G Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Sale of preferred stock, net (approximately)		$ 494
Fixed rate of conversion (in shares)	4,000
Series G preferred stock conversion to common stock (in shares) \| shares	19,742,776

Earnings Per Share - Schedule_2

Earnings Per Share - Schedule Of Anti-Dilutive Options and Awards (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average exercise price of stock options excluded from the calculation of diluted EPS (in dollars per share)	$ 16.44	$ 26.03	$ 24.36	$ 25.65
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	1,928	11	0	35
Other Equity Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from the calculation of diluted EPS (in shares)	7,589	493	2,496	199

Contingencies and Other Discl_2

Contingencies and Other Disclosures (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Estimated litigation liability	$ 2,000,000
Accrued losses on loan repurchase exposure	16,000,000	$ 16,000,000
Minimum
Loss Contingencies [Line Items]
Estimated litigation liability	0
Maximum
Loss Contingencies [Line Items]
Estimated litigation liability	$ 1,000,000

Retirement Plans - Narrative (D

Retirement Plans - Narrative (Details) - Pension Plan - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age	65 years
Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Pension plan contribution		$ 5
Defined benefit plan, expected future employer contributions, current fiscal year	$ 5

Retirement Plans - Schedule Of

Retirement Plans - Schedule Of Components Of Net Periodic Benefit Cost (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Components of net periodic benefit cost
Interest cost	$ 10	$ 5	$ 26	$ 15
Expected return on plan assets	(9)	(6)	(25)	(18)
Actuarial (gain) loss	3	4	9	8
Net periodic benefit cost	$ 4	$ 3	$ 10	$ 5

Business Segment Information -

Business Segment Information - Amounts of Consolidated Revenue, Expense, Tax and Assets by Segment (Details) - USD ($)	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Net interest income (expense)	$ 605,000,000			$ 662,000,000			$ 1,923,000,000	$ 1,683,000,000
Provision for credit losses	110,000,000			60,000,000			210,000,000	50,000,000
Noninterest income	173,000,000			213,000,000			745,000,000	642,000,000
Noninterest expense	474,000,000			469,000,000			1,508,000,000	1,450,000,000
Income (loss) before income taxes	194,000,000			346,000,000			950,000,000	825,000,000
Income tax expense (benefit)	52,000,000			78,000,000			223,000,000	183,000,000
Net income (loss)	142,000,000	$ 329,000,000	$ 255,000,000	268,000,000	$ 177,000,000	$ 198,000,000	727,000,000	642,000,000
Average assets	83,220,000,000			82,551,000,000			81,471,000,000	85,799,000,000
Gain on merger termination	0			0			225,000,000	0
Visa Class B Shares
Disaggregation of Revenue [Line Items]
Derivative valuation adjustment							15,000,000		$ 22,000,000
TD Transaction
Disaggregation of Revenue [Line Items]
Merger and integration expense	0			21,000,000			51,000,000	55,000,000
Regional Banking
Disaggregation of Revenue [Line Items]
Net interest income (expense)	583,000,000			518,000,000			1,781,000,000	1,410,000,000
Provision for credit losses	104,000,000			43,000,000			189,000,000	64,000,000
Noninterest income	109,000,000			110,000,000			325,000,000	337,000,000
Noninterest expense	318,000,000			303,000,000			960,000,000	906,000,000
Income (loss) before income taxes	270,000,000			282,000,000			957,000,000	777,000,000
Income tax expense (benefit)	63,000,000			66,000,000			224,000,000	182,000,000
Net income (loss)	207,000,000			216,000,000			733,000,000	595,000,000
Average assets	46,657,000,000			42,820,000,000			45,594,000,000	41,779,000,000
Gain on merger termination							0
Specialty Banking
Disaggregation of Revenue [Line Items]
Net interest income (expense)	135,000,000			138,000,000			390,000,000	423,000,000
Provision for credit losses	6,000,000			17,000,000			26,000,000	(4,000,000)
Noninterest income	46,000,000			64,000,000			147,000,000	265,000,000
Noninterest expense	89,000,000			105,000,000			270,000,000	352,000,000
Income (loss) before income taxes	86,000,000			80,000,000			241,000,000	340,000,000
Income tax expense (benefit)	21,000,000			19,000,000			58,000,000	83,000,000
Net income (loss)	65,000,000			61,000,000			183,000,000	257,000,000
Average assets	20,687,000,000			19,745,000,000			20,054,000,000	20,073,000,000
Gain on merger termination							0
Corporate
Disaggregation of Revenue [Line Items]
Net interest income (expense)	(113,000,000)			6,000,000			(248,000,000)	(150,000,000)
Provision for credit losses	0			0			(5,000,000)	(10,000,000)
Noninterest income	18,000,000			39,000,000			273,000,000	40,000,000
Noninterest expense	67,000,000			61,000,000			278,000,000	192,000,000
Income (loss) before income taxes	(162,000,000)			(16,000,000)			(248,000,000)	(292,000,000)
Income tax expense (benefit)	(32,000,000)			(7,000,000)			(59,000,000)	(82,000,000)
Net income (loss)	(130,000,000)			(9,000,000)			(189,000,000)	(210,000,000)
Average assets	15,876,000,000			19,986,000,000			15,823,000,000	23,947,000,000
Gain on merger termination							225,000,000
Gain on sale of mortgage servicing rights								12,000,000
Gain on disposition of business				10,000,000				10,000,000
Restructuring costs	10,000,000						10,000,000
Surrender of bank owned life insurance policies, expense	24,000,000						24,000,000
Benefit from merger-related tax items	$ 11,000,000						11,000,000
Corporate \| Visa Class B Shares
Disaggregation of Revenue [Line Items]
Derivative valuation adjustment							(15,000,000)
Corporate \| Insurance Business
Disaggregation of Revenue [Line Items]
Gain on disposition of business				21,000,000				21,000,000
Corporate \| Fintech Investment
Disaggregation of Revenue [Line Items]
Gain on sale of investments								6,000,000
Corporate \| First Horizon Foundation
Disaggregation of Revenue [Line Items]
Payment for cash contribution							50,000,000
Corporate \| TD Transaction
Disaggregation of Revenue [Line Items]
Gain on merger termination							225,000,000
Merger and integration expense							$ 51,000,000
Corporate \| BKC Merger and TD Merger Agreement
Disaggregation of Revenue [Line Items]
Merger and integration expense				$ 24,000,000				99,000,000
Corporate \| BKC Merger and TD Merger Agreement \| Visa Class B Shares
Disaggregation of Revenue [Line Items]
Derivative valuation adjustment								$ 12,000,000

Business Segment Information _2

Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Noninterest income:
Deposit transactions and cash management	$ 46,000	$ 43,000	$ 133,000	$ 129,000
Fixed income	28,000	46,000	97,000	170,000
Brokerage, management fees and commissions	21,000	23,000	66,000	71,000
Card and digital banking fees	20,000	21,000	61,000	64,000
Other service charges and fees	14,000	13,000	41,000	41,000
Trust services and investment management	12,000	11,000	35,000	36,000
Mortgage banking and title income	7,000	9,000	18,000	65,000
Deferred compensation income	0	(3,000)	11,000	(24,000)
Gain on merger termination	0	0	225,000	0
Securities gains (losses), net	0	12,000	1,000	18,000
Other income	25,000	38,000	57,000	72,000
Total noninterest income	173,000	213,000	745,000	642,000
Underwriting, portfolio advisory, and other noninterest income
Noninterest income:
Revenue from contract with customer	13,000	13,000	32,000	33,000
Regional Banking
Noninterest income:
Deposit transactions and cash management	41,000	39,000	120,000	115,000
Fixed income	0	0	0	0
Brokerage, management fees and commissions	21,000	23,000	66,000	71,000
Card and digital banking fees	19,000	19,000	55,000	57,000
Other service charges and fees	7,000	8,000	23,000	24,000
Trust services and investment management	12,000	11,000	35,000	36,000
Mortgage banking and title income	0	0	0	0
Deferred compensation income		0	0	0
Gain on merger termination			0
Securities gains (losses), net		0	0	0
Other income	9,000	10,000	26,000	34,000
Total noninterest income	109,000	110,000	325,000	337,000
Specialty Banking
Noninterest income:
Deposit transactions and cash management	3,000	2,000	7,000	7,000
Fixed income	28,000	46,000	98,000	170,000
Brokerage, management fees and commissions	0	0	0	0
Card and digital banking fees	0	0	1,000	2,000
Other service charges and fees	7,000	5,000	18,000	17,000
Trust services and investment management	0	0	0	0
Mortgage banking and title income	7,000	9,000	18,000	65,000
Deferred compensation income		0	0	0
Gain on merger termination			0
Securities gains (losses), net		0	0	0
Other income	1,000	2,000	5,000	4,000
Total noninterest income	46,000	64,000	147,000	265,000
Corporate
Noninterest income:
Deposit transactions and cash management	2,000	2,000	6,000	7,000
Fixed income	0	0	(1,000)	0
Brokerage, management fees and commissions	0	0	0	0
Card and digital banking fees	1,000	2,000	5,000	5,000
Other service charges and fees	0	0	0	0
Trust services and investment management	0	0	0	0
Mortgage banking and title income	0	0	0	0
Deferred compensation income		(3,000)	11,000	(24,000)
Gain on merger termination			225,000
Securities gains (losses), net		12,000	1,000	18,000
Other income	15,000	26,000	26,000	34,000
Total noninterest income	$ 18,000	$ 39,000	$ 273,000	$ 40,000

Variable Interest Entities - Su

Variable Interest Entities - Summary Of VIE Consolidated By FHN (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets
Other assets	$ 4,582	$ 4,080
Liabilities:
Other liabilities	2,695	2,479
Rabbi Trusts used for Deferred Compensation Plans
Assets
Other assets	172	181
Liabilities:
Other liabilities	$ 144	$ 150

Variable Interest Entities - _2

Variable Interest Entities - Summary of the Impact of Qualifying LIHTC Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Low income housing tax credits
Variable Interest Entity [Line Items]
Amortization of qualifying LIHTC investments	$ 13	$ 11	$ 39	$ 33
Low income housing tax credits and other tax benefits related to qualifying LIHTC investments	(14)	(11)	(41)	(35)
Other tax benefits related to qualifying LIHTC investments
Variable Interest Entity [Line Items]
Low income housing tax credits and other tax benefits related to qualifying LIHTC investments	$ (3)	$ (3)	$ (8)	$ (9)

Variable Interest Entities - _3

Variable Interest Entities - Summary Of VIE Not Consolidated By FHN (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Liability Recognized	$ 73,740,000,000	$ 70,406,000,000
Trading securities	1,231,000,000	1,375,000,000
Term borrowings	1,157,000,000	1,597,000,000
Securities held to maturity	1,104,000,000	1,209,000,000
Securities available for sale at fair value	8,100,000,000	8,836,000,000
Low income housing partnerships
Variable Interest Entity [Line Items]
Maximum Loss Exposure	498,000,000	463,000,000
Maximum loss exposure, contractual funding commitments	155,000,000	154,000,000
Low income housing partnerships \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	155,000,000	154,000,000
Low income housing partnerships \| Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	343,000,000	309,000,000
Other tax credit investments
Variable Interest Entity [Line Items]
Maximum Loss Exposure	81,000,000	85,000,000
Other tax credit investments \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	65,000,000	67,000,000
Small issuer trust preferred holdings
Variable Interest Entity [Line Items]
Maximum Loss Exposure	173,000,000	171,000,000
Small issuer trust preferred holdings \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	0	0
On-balance sheet trust preferred securitization
Variable Interest Entity [Line Items]
Maximum Loss Exposure	27,000,000	27,000,000
Loans and leases	112,000,000
Loans and leases		112,000,000
Trading securities	2,000,000	2,000,000
Term borrowings	87,000,000	87,000,000
On-balance sheet trust preferred securitization \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	87,000,000	87,000,000
Holdings of agency mortgage-backed securities
Variable Interest Entity [Line Items]
Maximum Loss Exposure	7,907,000,000	8,652,000,000
Trading securities	147,000,000	205,000,000
Securities held to maturity	1,300,000,000	1,400,000,000
Securities available for sale at fair value	6,400,000,000	7,100,000,000
Holdings of agency mortgage-backed securities \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	0	0
Commercial loan modifications to borrowers experiencing financial difficulty
Variable Interest Entity [Line Items]
Maximum Loss Exposure	39,000,000
Maximum loss exposure, contractual funding commitments	0
Commercial loan modifications to borrowers experiencing financial difficulty \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	0
Commercial loan modifications to borrowers experiencing financial difficulty \| Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments	39,000,000
Commercial loan troubled debt restructurings
Variable Interest Entity [Line Items]
Maximum Loss Exposure		53,000,000
Maximum loss exposure, contractual funding commitments		0
Commercial loan troubled debt restructurings \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized		0
Commercial loan troubled debt restructurings \| Other Assets
Variable Interest Entity [Line Items]
Maximum loss exposure, current investments		53,000,000
Proprietary trust preferred issuances
Variable Interest Entity [Line Items]
Maximum Loss Exposure	0	0
Proprietary trust preferred issuances \| Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liability Recognized	$ 167,000,000	$ 167,000,000

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Derivatives - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash payables	$ 662		$ 662		$ 380
Total trading revenues	19	$ 34	68	$ 133
Hedged amount of foreign currency denominated loans	16		16		9
Additional Derivative Agreements \| Derivative Instruments With Adjustable Collateral Posting Thresholds
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	6		6		5
Net fair value of derivative liabilities with adjustable posting thresholds	310		310		268
Collateral received	86		86		106
Securities posted collateral	138		138		61
Additional Derivative Agreements \| Derivative Instruments With Accelerated Termination Provisions
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	624		624		378
Net fair value of derivative liabilities with adjustable posting thresholds	310		310		268
Collateral received	709		709		479
Securities posted collateral	138		138		61
Credit Risk Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, notional amount	353		353		242
Derivative liability, notional amount	896		896		742
Visa Class B Shares
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities related to sale	26		26		27
Derivative valuation adjustment			15		22
Counterparties
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash receivables	629		629		159
Collateral cash payables	$ 27		$ 27		$ 42

Derivatives - Derivatives Assoc

Derivatives - Derivatives Associated with Fixed Income Trading Activities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 3,724	$ 3,076
Assets	4	3
Liabilities	311	270
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,958	3,076
Assets	222	91
Liabilities	6	6
Option contracts purchased \| Long
Derivative Instruments, Gain (Loss) [Line Items]
Notional		40
Assets		0
Liabilities		0
Forwards and futures purchased
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,202	1,127
Assets	1	5
Liabilities	7	2
Forwards and futures sold
Derivative Instruments, Gain (Loss) [Line Items]
Notional	1,275	1,256
Assets	8	4
Liabilities	$ 1	$ 5

Derivatives - Derivatives Ass_2

Derivatives - Derivatives Associated With Interest Rate Risk Management Activities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	$ 3,724	$ 3,076
Assets	4	3
Liabilities	311	270
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	3,958	3,076
Assets	222	91
Liabilities	6	6
Customer Interest Rate Contracts Hedging \| Hedging Instruments And Hedged Items \| Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	8,563	8,377
Assets	1	3
Liabilities	631	570
Customer Interest Rate Contracts Hedging \| Hedging Instruments And Hedged Items \| Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional	8,563	8,377
Assets	626	351
Liabilities	$ 2	$ 5

Derivatives - Gains_(Losses) on

Derivatives - Gains/(Losses) on Derivatives Associated with Interest Rate Risk Management Activities (Details) - Customer Interest Rate Contracts Hedging - Hedging Instruments And Hedged Items - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Customer interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate derivatives	$ (95)	$ 271	$ (63)	$ 788
Offsetting upstream interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate derivatives	$ 95	$ (271)	$ 63	$ (788)

Derivatives - Derivatives Ass_3

Derivatives - Derivatives Associated With Cash Flow Hedges and Mortgage Banking Hedges (Details) - Hedging Instruments And Hedged Items - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Cash Flow Hedge \| Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Variability in cash flows related to debt instruments (primarily loans)	$ 5,200	$ 5,350
Cash Flow Hedge \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Notional	5,200	5,350
Assets	0	0
Liabilities	118	71
Mortgage Banking Hedges \| Option contracts written
Derivative Instruments, Gain (Loss) [Line Items]
Notional	84	35
Assets	1	0
Liabilities	0	0
Mortgage Banking Hedges \| Forward contracts written
Derivative Instruments, Gain (Loss) [Line Items]
Notional	129	61
Assets	1	0
Liabilities	$ 0	$ 0

Derivatives - Gains_(Losses) _2

Derivatives - Gains/(Losses) on Derivatives Associated with Cash Flow Hedges and Mortgage Banking Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) expected to be reclassified to earnings in the next twelve months	$ (29)	$ (29)	$ (29)	$ (29)
Cash Flow Hedge \| Hedging Instruments And Hedged Items
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses), cash flow hedges	(34)	(103)	(60)	(149)
Gain (loss) reclassified from AOCI into interest income	14	4	38	7
Cash Flow Hedge \| Hedging Instruments And Hedged Items \| Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses), cash flow hedges	(30)	(138)	(44)	(105)
Mortgage Banking Hedges \| Hedging Instruments And Hedged Items \| Option contracts written
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	0	4	(2)	5
Mortgage Banking Hedges \| Hedging Instruments And Hedged Items \| Forward contracts written
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on derivative instruments	$ (2)	$ 6	$ 2	$ 33

Derivatives - Derivative Assets

Derivatives - Derivative Assets and Collateral Received (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Gross amounts of recognized assets	$ 861	$ 458
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	861	458
Derivative liabilities available for offset	(100)	(64)
Collateral received	(662)	(380)
Net amount	99	14
Derivative assets not subject to master netting agreements	2	2
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized assets	853	449
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	853	449
Derivative liabilities available for offset	(96)	(58)
Collateral received	(662)	(378)
Net amount	95	13
Forward contracts
Derivative [Line Items]
Gross amounts of recognized assets	8	9
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	8	9
Derivative liabilities available for offset	(4)	(6)
Collateral received	0	(2)
Net amount	$ 4	$ 1

Derivatives - Derivative Liabil

Derivatives - Derivative Liabilities and Collateral Pledged (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Gross amounts of recognized liabilities	$ 1,076	$ 929
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	1,076	929
Derivative assets available for offset	(100)	(64)
Collateral pledged	(239)	(176)
Net amount	737	689
Derivative liabilities not subject to master netting agreements	27	29
Interest rate derivative contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	1,068	921
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	1,068	921
Derivative assets available for offset	(96)	(58)
Collateral pledged	(238)	(175)
Net amount	734	688
Forward contracts
Derivative [Line Items]
Gross amounts of recognized liabilities	8	8
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	8	8
Derivative assets available for offset	(4)	(6)
Collateral pledged	(1)	(1)
Net amount	$ 3	$ 1

Master Netting and Similar Ag_3

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Securities Purchased under Agreements to Resell [Abstract]
Gross amounts of recognized assets	$ 363	$ 353
Gross amounts offset in the Balance Sheets	0	0
Net amounts of assets presented in the Balance Sheets	363	353
Offsetting securities sold under agreements to repurchase	0	(10)
Securities collateral (not recognized on FHN’s Balance Sheets)	(361)	(340)
Net amount	$ 2	$ 3

Master Netting and Similar Ag_4

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Securities Sold under Agreements to Repurchase [Abstract]
Gross amounts of recognized liabilities	$ 1,707	$ 1,013
Gross amounts offset in the Balance Sheets	0	0
Net amounts of liabilities presented in the Balance Sheets	1,707	1,013
Offsetting securities purchased under agreements to resell	0	(10)
Securities/ government guaranteed loans collateral	(1,707)	(1,003)
Net amount	$ 0	$ 0

Master Netting and Similar Ag_5

Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 1,707	$ 1,013
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	1,707	1,013
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
U.S. treasuries
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase		10
U.S. treasuries \| Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase		10
U.S. treasuries \| Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase		0
Government agency issued MBS
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	1,508	851
Government agency issued MBS \| Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	1,508	851
Government agency issued MBS \| Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Government agency issued CMO
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	159	122
Government agency issued CMO \| Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	159	122
Government agency issued CMO \| Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	0	0
Other U.S. government agencies
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	40	30
Other U.S. government agencies \| Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	40	30
Other U.S. government agencies \| Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities sold under agreements to repurchase	$ 0	$ 0

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 1,231	$ 1,375
Loans held-for-sale	88	51
Securities available for sale at fair value	8,100	8,836
Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	88	51
Securities available for sale at fair value	8,100	8,836
Total other assets	985	594
Total assets	10,404	10,856
Total other liabilities	1,102	958
Total liabilities	1,468	1,293
Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	0	0
Securities available for sale at fair value	0	0
Total other assets	132	143
Total assets	132	143
Total other liabilities	8	8
Total liabilities	8	8
Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	67	29
Securities available for sale at fair value	8,100	8,836
Total other assets	853	451
Total assets	10,228	10,666
Total other liabilities	1,068	923
Total liabilities	1,434	1,258
Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	21	22
Securities available for sale at fair value	0	0
Total other assets	0	0
Total assets	44	47
Total other liabilities	26	27
Total liabilities	26	27
Deferred compensation mutual funds \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	99	112
Deferred compensation mutual funds \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	99	112
Deferred compensation mutual funds \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Deferred compensation mutual funds \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Equity, mutual funds, and other \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	23	22
Equity, mutual funds, and other \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	23	22
Equity, mutual funds, and other \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Equity, mutual funds, and other \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Derivatives, forwards and futures \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	10	9
Total other liabilities	8	8
Derivatives, forwards and futures \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	10	9
Total other liabilities	8	8
Derivatives, forwards and futures \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, forwards and futures \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	853	449
Total other liabilities	1,068	922
Derivatives, interest rate contracts \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, interest rate contracts \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	853	449
Total other liabilities	1,068	922
Derivatives, interest rate contracts \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets	0	0
Total other liabilities	0	0
Derivatives, other \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets		2
Total other liabilities	26	28
Derivatives, other \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets		0
Total other liabilities	0	0
Derivatives, other \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets		2
Total other liabilities	0	1
Derivatives, other \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total other assets		0
Total other liabilities	26	27
Government agency issued MBS \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	4,325	4,763
Government agency issued MBS \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Government agency issued MBS \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	4,325	4,763
Government agency issued MBS \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Government agency issued CMO \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	2,100	2,313
Government agency issued CMO \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Government agency issued CMO \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	2,100	2,313
Government agency issued CMO \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Other U.S. government agencies \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	1,128	1,163
Other U.S. government agencies \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Other U.S. government agencies \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	1,128	1,163
Other U.S. government agencies \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
States and municipalities \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	547	597
States and municipalities \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
States and municipalities \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	547	597
States and municipalities \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Securities available for sale at fair value	0	0
Specialty Banking \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,231	1,375
Total trading liabilities	366	335
Specialty Banking \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	1,208	1,350
Total trading liabilities	366	335
Specialty Banking \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	23	25
Total trading liabilities	0	0
Specialty Banking \| U.S. treasuries \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	24	101
Total trading liabilities	301	275
Specialty Banking \| U.S. treasuries \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| U.S. treasuries \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	24	101
Total trading liabilities	301	275
Specialty Banking \| U.S. treasuries \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Government agency issued MBS \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	53	144
Total trading liabilities	1	2
Specialty Banking \| Government agency issued MBS \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Government agency issued MBS \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	53	144
Total trading liabilities	1	2
Specialty Banking \| Government agency issued MBS \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Government agency issued CMO \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	94	61
Specialty Banking \| Government agency issued CMO \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| Government agency issued CMO \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	94	61
Specialty Banking \| Government agency issued CMO \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| Other U.S. government agencies \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	252	115
Total trading liabilities	9
Specialty Banking \| Other U.S. government agencies \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0
Specialty Banking \| Other U.S. government agencies \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	252	115
Total trading liabilities	9
Specialty Banking \| Other U.S. government agencies \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0
Specialty Banking \| States and municipalities \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	26	54
Specialty Banking \| States and municipalities \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| States and municipalities \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	26	54
Specialty Banking \| States and municipalities \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| Corporate and other debt \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	759	875
Total trading liabilities	55	58
Specialty Banking \| Corporate and other debt \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Corporate and other debt \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	759	875
Total trading liabilities	55	58
Specialty Banking \| Corporate and other debt \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Total trading liabilities	0	0
Specialty Banking \| Interest-only strips \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	23	25
Specialty Banking \| Interest-only strips \| Level 1 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| Interest-only strips \| Level 2 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	0	0
Specialty Banking \| Interest-only strips \| Level 3 \| Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Trading securities	$ 23	$ 25

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value (Details) - Level 3 - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net derivative liabilities
Beginning balance	$ (34)	$ (28)	$ (27)	$ (23)
Total net gains (losses) included in net income	0	(1)	(15)	(13)
Purchases			0	0
Sales	0	0	0	0
Settlements	8	9	16	16
Repayments		0		0
Net transfers into (out of) Level 3	0	0	0	0
Ending balance	(26)	(20)	(26)	(20)
Net unrealized gains (losses) included in net income	0	(1)	(15)	(13)
Interest-only strips
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	36	26	25	38
Total net gains (losses) included in net income	(4)	(2)	(10)	(5)
Purchases			0	0
Sales	(30)	(23)	(38)	(61)
Settlements	0	0	0	0
Repayments		0		0
Net transfers into (out of) Level 3	21	22	46	51
Ending balance	23	23	23	23
Net unrealized gains (losses) included in net income	(2)	(1)	(4)	(2)
Loans held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	22	34	22	28
Total net gains (losses) included in net income	0	0	0	0
Purchases			2	1
Sales	0	(14)	(2)	(14)
Settlements	(1)	0	(1)	(1)
Repayments		(1)		(1)
Net transfers into (out of) Level 3	0	1	0	7
Ending balance	21	20	21	20
Net unrealized gains (losses) included in net income	$ 0	$ 0	$ 0	$ 0

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Level 3
Segment Reporting Information [Line Items]
Fair value, asset (liability), unrealized gain (loss), OCI	$ 0	$ 0

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities - Nonrecurring Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 88	$ 51
Loans and leases	61,778	58,102
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases	223	135
OREO	4	3
Other assets	92	91
Non Recurring \| Loans held for sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	496	506
Non Recurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases	0	0
OREO	0	0
Other assets	0	0
Non Recurring \| Level 1 \| Loans held for sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	0	0
Non Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases	0	0
OREO	0	0
Other assets	0	0
Non Recurring \| Level 2 \| Loans held for sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	496	506
Non Recurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases	223	135
OREO	4	3
Other assets	92	91
Non Recurring \| Level 3 \| Loans held for sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	$ 0	$ 0

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities - Gains/(losses) on Nonrecurring Fair Value Measurements (Details) - Non Recurring - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses),loans and leases	$ (15)	$ (6)	$ (29)	$ (7)
Net gains/(losses), other assets	(1)	(4)	(5)	(8)
Gains (losses) on financial assets measured on non-recurring basis	(17)	(12)	(36)	(19)
SBAs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), loans held for sale - SBAs and USDA	$ (1)	$ (2)	$ (2)	$ (4)

Fair Value of Assets and Liab_8

Fair Value of Assets and Liabilities - Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements (Details) $ in Millions	Sep. 30, 2023 USD ($) month	Dec. 31, 2022 USD ($) month
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale at fair value	$ 8,100	$ 8,836
Loans held-for-sale	88	51
Derivative Liabilities, fair value	1,076	929
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, fair value	26	27
Loans and leases, fair value	223	135
OREO, fair value	4	3
Level 3 \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets	92	91
Level 3 \| Residential Real Estate \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale	21	22
Level 3 \| Interest-only strips \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale at fair value	$ 23	$ 25
Constant prepayment rate \| Level 3 \| Interest-only strips \| Minimum \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12	0.12
Constant prepayment rate \| Level 3 \| Interest-only strips \| Maximum \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.13	0.13
Constant prepayment rate \| Level 3 \| Interest-only strips \| Weighted Average \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.13	0.12
Bond equivalent yield \| Level 3 \| Interest-only strips \| Minimum \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.18	0.17
Bond equivalent yield \| Level 3 \| Interest-only strips \| Maximum \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.19
Bond equivalent yield \| Level 3 \| Interest-only strips \| Weighted Average \| Discounted cash flow \| Trading Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.18	0.17
Prepayment speeds - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Minimum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.02	2
Prepayment speeds - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Maximum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.07	8
Prepayment speeds - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Weighted Average \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.03	0.03
Foreclosure losses \| Level 3 \| Residential Real Estate \| Minimum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.64	63
Foreclosure losses \| Level 3 \| Residential Real Estate \| Maximum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.73	75
Foreclosure losses \| Level 3 \| Residential Real Estate \| Weighted Average \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.65	0.65
Loss severity trends - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Minimum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0	0
Loss severity trends - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Maximum \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.08	11
Loss severity trends - First mortgage \| Level 3 \| Loans held for sale—first mortgages \| Weighted Average \| Discounted cash flow \| Loans Held For Sale, Residential Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, measurement input	0.04	0.05
Visa covered litigation resolution amount \| Level 3 \| Minimum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input, value	$ 5,700	$ 5,600
Visa covered litigation resolution amount \| Level 3 \| Maximum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input, value	6,700	6,000
Visa covered litigation resolution amount \| Level 3 \| Weighted Average \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input, value	$ 6,300	$ 5,900
Probability of resolution scenarios \| Level 3 \| Minimum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input	0.10	5
Probability of resolution scenarios \| Level 3 \| Maximum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input	0.25	25
Probability of resolution scenarios \| Level 3 \| Weighted Average \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input	0.18	0.20
Time until resolution \| Level 3 \| Minimum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input \| month	12	12
Time until resolution \| Level 3 \| Maximum \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input \| month	36	42
Time until resolution \| Level 3 \| Weighted Average \| Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities, measurement input \| month	26	28
Marketability adjustments for specific properties \| Level 3 \| Minimum \| Appraisals from comparable properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0	0
Marketability adjustments for specific properties \| Level 3 \| Minimum \| Appraisals from comparable properties \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0	0
Marketability adjustments for specific properties \| Level 3 \| Maximum \| Appraisals from comparable properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0.10	10
Marketability adjustments for specific properties \| Level 3 \| Maximum \| Appraisals from comparable properties \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0.25	25
Borrowing base certificates adjustment \| Level 3 \| Minimum \| Other collateral valuations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0.20	20
Borrowing base certificates adjustment \| Level 3 \| Maximum \| Other collateral valuations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0.50	50
Financial Statements/Auction values adjustment \| Level 3 \| Minimum \| Other collateral valuations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0	0
Financial Statements/Auction values adjustment \| Level 3 \| Maximum \| Other collateral valuations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans and leases, measurement input	0.25	25
Adjustment for value changes since appraisal \| Level 3 \| Minimum \| Appraisals from comparable properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0	0
Adjustment for value changes since appraisal \| Level 3 \| Maximum \| Appraisals from comparable properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO measurement input	0.10	10
Adjustments to current sales yields for specific properties \| Level 3 \| Minimum \| Discounted cash flow \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0	0
Adjustments to current sales yields for specific properties \| Level 3 \| Maximum \| Discounted cash flow \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets, measurement input	0.15	15

Fair Value of Assets and Liab_9

Fair Value of Assets and Liabilities - Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	$ 88	$ 51
Held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	88	51
Fair value carrying amount less aggregate unpaid principal - Total loans	(8)	(7)
Nonaccrual loans	2	5
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans	(3)	(3)
Loans 90 days or more past due and still accruing		1
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing		0
Aggregate unpaid principal \| Held for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans held-for-sale	96	58
Nonaccrual loans	$ 5	8
Loans 90 days or more past due and still accruing		$ 1

Fair Value of Assets and Lia_10

Fair Value of Assets and Liabilities - Changes In Fair Value Of Assets And Liabilities Which Fair Value Option Included In Current Period Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Mortgage Banking Noninterest Income \| Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ (1)	$ (4)	$ 0	$ (10)

Fair Value of Assets and Lia_11

Fair Value of Assets and Liabilities - Summary Of Book Value And Estimated Fair Value Of Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	$ 61,018	$ 57,417
Short-term financial assets:
Interest-bearing deposits with banks	1,917	1,384
Securities purchased under agreements to resell	363	353
Trading securities	1,231	1,375
Loans held for sale:	613	590
Securities available for sale at fair value	8,100	8,836
Securities held to maturity	1,335	1,371
Derivative assets	861	458
Other Assets Financial Instruments [Abstract]
Total assets	82,533	78,953
Liabilities:
Trading liabilities	366	335
Short Term Financial Liabilities [Abstract]
Securities sold under agreements to repurchase	1,707	1,013
Long-Term Debt, Unclassified [Abstract]
Other long-term borrowings	1,157	1,597
Derivative liabilities	1,076	929
Total liabilities	73,740	70,406
Fair Value, Inputs, Level 3 \| FHLB-Cincinnati Stock
Long-Term Debt, Unclassified [Abstract]
Restricted investments	51	50
Fair Value, Inputs, Level 3 \| FRB Stock
Long-Term Debt, Unclassified [Abstract]
Restricted investments	203	203
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	61,018	57,417
Short-term financial assets:
Interest-bearing deposits with banks	1,917	1,384
Federal funds sold	53	129
Securities purchased under agreements to resell	363	353
Total short-term financial assets	2,333	1,866
Trading securities	1,231	1,375
Loans held for sale:	613	590
Securities available for sale at fair value	8,100	8,836
Securities held to maturity	1,335	1,371
Derivative assets	863	460
Other Assets Financial Instruments [Abstract]
Tax credit investments	578	547
Deferred compensation mutual funds	99	112
Equity, mutual funds, and other	277	275
Total other assets	954	934
Total assets	76,447	72,849
Liabilities:
Defined maturity deposits	7,783	2,887
Trading liabilities	366	335
Short Term Financial Liabilities [Abstract]
Federal funds purchased	309	400
Securities sold under agreements to repurchase	1,706	1,013
Other short-term borrowings	492	1,093
Total short-term financial liabilities	2,507	2,506
Long-Term Debt, Unclassified [Abstract]
Real estate investment trust-preferred	46	46
Term borrowings—new market tax credit investment	65	66
Secured borrowings	12	3
Junior subordinated debentures	150	148
Other long-term borrowings	884	1,334
Total term borrowings	1,157	1,597
Derivative liabilities	1,102	958
Total liabilities	12,915	8,283
Reported Value Measurement \| Commercial, financial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	32,828	31,473
Reported Value Measurement \| Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	13,952	13,082
Reported Value Measurement \| Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	13,457	12,053
Reported Value Measurement \| Credit card and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	781	809
Reported Value Measurement \| Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale:	88	51
Reported Value Measurement \| USDA & SBA loans - LOCOM
Short-term financial assets:
Loans held for sale:	496	506
Reported Value Measurement \| Mortgage loans - LOCOM
Short-term financial assets:
Loans held for sale:	29	33
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	59,101	56,982
Short-term financial assets:
Interest-bearing deposits with banks	1,917	1,384
Federal funds sold	53	129
Securities purchased under agreements to resell	363	353
Total short-term financial assets	2,333	1,866
Trading securities	1,231	1,375
Loans held for sale:	617	596
Securities available for sale at fair value	8,100	8,836
Securities held to maturity	1,104	1,209
Derivative assets	863	460
Other Assets Financial Instruments [Abstract]
Tax credit investments	570	542
Deferred compensation mutual funds	99	112
Equity, mutual funds, and other	277	275
Total other assets	946	929
Total assets	74,295	72,253
Liabilities:
Defined maturity deposits	7,830	2,890
Trading liabilities	366	335
Short Term Financial Liabilities [Abstract]
Federal funds purchased	309	400
Securities sold under agreements to repurchase	1,706	1,013
Other short-term borrowings	492	1,093
Total short-term financial liabilities	2,507	2,506
Long-Term Debt, Unclassified [Abstract]
Real estate investment trust-preferred	47	47
Term borrowings—new market tax credit investment	59	59
Secured borrowings	12	3
Junior subordinated debentures	150	150
Other long-term borrowings	809	1,301
Total term borrowings	1,077	1,560
Derivative liabilities	1,102	958
Total liabilities	12,882	8,249
Unfunded Commitments [Abstract]
Loan commitments	2	1
Standby and other commitments	7	7
Estimate of Fair Value Measurement \| Commercial, financial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	32,205	31,329
Estimate of Fair Value Measurement \| Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	13,661	12,909
Estimate of Fair Value Measurement \| Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	12,480	11,934
Estimate of Fair Value Measurement \| Credit card and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	755	810
Estimate of Fair Value Measurement \| Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale:	88	51
Estimate of Fair Value Measurement \| USDA & SBA loans - LOCOM
Short-term financial assets:
Loans held for sale:	500	512
Estimate of Fair Value Measurement \| Mortgage loans - LOCOM
Short-term financial assets:
Loans held for sale:	29	33
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Short-term financial assets:
Interest-bearing deposits with banks	1,917	1,384
Federal funds sold	0	0
Securities purchased under agreements to resell	0	0
Total short-term financial assets	1,917	1,384
Trading securities	0	0
Loans held for sale:	0	0
Securities available for sale at fair value	0	0
Securities held to maturity	0	0
Derivative assets	10	9
Other Assets Financial Instruments [Abstract]
Tax credit investments	0	0
Deferred compensation mutual funds	99	112
Equity, mutual funds, and other	23	22
Total other assets	122	134
Total assets	2,049	1,527
Liabilities:
Defined maturity deposits	0	0
Trading liabilities	0	0
Short Term Financial Liabilities [Abstract]
Federal funds purchased	0	0
Securities sold under agreements to repurchase	0	0
Other short-term borrowings	0	0
Total short-term financial liabilities	0	0
Long-Term Debt, Unclassified [Abstract]
Real estate investment trust-preferred	0	0
Term borrowings—new market tax credit investment	0	0
Secured borrowings	0	0
Junior subordinated debentures	0	0
Other long-term borrowings	0	0
Total term borrowings	0	0
Derivative liabilities	8	8
Total liabilities	8	8
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Commercial, financial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Credit card and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale:	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| USDA & SBA loans - LOCOM
Short-term financial assets:
Loans held for sale:	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 1 \| Mortgage loans - LOCOM
Short-term financial assets:
Loans held for sale:	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Short-term financial assets:
Interest-bearing deposits with banks	0	0
Federal funds sold	53	129
Securities purchased under agreements to resell	363	353
Total short-term financial assets	416	482
Trading securities	1,208	1,350
Loans held for sale:	567	541
Securities available for sale at fair value	8,100	8,836
Securities held to maturity	1,104	1,209
Derivative assets	853	451
Other Assets Financial Instruments [Abstract]
Tax credit investments	0	0
Deferred compensation mutual funds	0	0
Equity, mutual funds, and other	0	0
Total other assets	0	0
Total assets	12,248	12,869
Liabilities:
Defined maturity deposits	7,830	2,890
Trading liabilities	366	335
Short Term Financial Liabilities [Abstract]
Federal funds purchased	309	400
Securities sold under agreements to repurchase	1,706	1,013
Other short-term borrowings	492	1,093
Total short-term financial liabilities	2,507	2,506
Long-Term Debt, Unclassified [Abstract]
Real estate investment trust-preferred	0	0
Term borrowings—new market tax credit investment	0	0
Secured borrowings	0	0
Junior subordinated debentures	0	0
Other long-term borrowings	809	1,301
Total term borrowings	809	1,301
Derivative liabilities	1,068	923
Total liabilities	12,580	7,955
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Commercial, financial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Credit card and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale:	67	29
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| USDA & SBA loans - LOCOM
Short-term financial assets:
Loans held for sale:	500	512
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2 \| Mortgage loans - LOCOM
Short-term financial assets:
Loans held for sale:	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	59,101	56,982
Short-term financial assets:
Interest-bearing deposits with banks	0	0
Federal funds sold	0	0
Securities purchased under agreements to resell	0	0
Total short-term financial assets	0	0
Trading securities	23	25
Loans held for sale:	50	55
Securities available for sale at fair value	0	0
Securities held to maturity	0	0
Derivative assets	0	0
Other Assets Financial Instruments [Abstract]
Tax credit investments	570	542
Deferred compensation mutual funds	0	0
Equity, mutual funds, and other	254	253
Total other assets	824	795
Total assets	59,998	57,857
Liabilities:
Defined maturity deposits	0	0
Trading liabilities	0	0
Short Term Financial Liabilities [Abstract]
Federal funds purchased	0	0
Securities sold under agreements to repurchase	0	0
Other short-term borrowings	0	0
Total short-term financial liabilities	0	0
Long-Term Debt, Unclassified [Abstract]
Real estate investment trust-preferred	47	47
Term borrowings—new market tax credit investment	59	59
Secured borrowings	12	3
Junior subordinated debentures	150	150
Other long-term borrowings	0	0
Total term borrowings	268	259
Derivative liabilities	26	27
Total liabilities	294	286
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Commercial, financial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	32,205	31,329
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Commercial Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	13,661	12,909
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Consumer Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	12,480	11,934
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Credit card and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans and leases	755	810
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Mortgage loans (elected fair value)
Short-term financial assets:
Loans held for sale:	21	22
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| USDA & SBA loans - LOCOM
Short-term financial assets:
Loans held for sale:	0	0
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 3 \| Mortgage loans - LOCOM
Short-term financial assets:
Loans held for sale:	29	33
Contractual Amount
Unfunded Commitments [Abstract]
Loan commitments	25,402	25,953
Standby and other commitments	$ 728	$ 754