Basis of Presentation and Accounting Policies	6 Months Ended
Jun. 30, 2022
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, as amended, for the year ended December 31, 2021. 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. Pending Merger 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”), TD Bank US Holding Company, a Delaware corporation and indirect, wholly owned subsidiary of TD (“TD-US”), and Falcon Holdings Acquisition Co., a Delaware corporation and wholly owned subsidiary of TD-US (“Merger Sub”). Pursuant to the TD Merger Agreement, FHN and Merger Sub will merge (the “First Holding Company Merger”), with FHN continuing as the surviving entity in the merger. Following the First Holding Company Merger, at the election of TD, FHN and TD-US will merge (the “Second Holding Company Merger” and, together with the First Holding Company Merger, the “Holding Company Mergers”), with TD-US continuing as the surviving entity in the merger. Upon the terms and subject to the conditions set forth in the TD Merger Agreement, each share of FHN common stock, par value $0.625 per share, (“Company Common Stock”), issued and outstanding immediately prior to the effective time of the First Holding Company Merger (the “First Effective Time”) will be converted into the right to receive $25.00 (USD) per share in cash, without interest. If the transaction does not close on or before November 27, 2022, shareholders will receive an additional $0.65 per share of Company Common Stock on an annualized basis (or approximately 5.4 cents per month) for the period from November 28, 2022 through the day immediately prior to the closing. Each outstanding share of FHN’s preferred stock, series B, C, D, E and F, will remain issued and outstanding in connection with the First Holding Company Merger. If TD elects to effect the Second Holding Company Merger, at the effective time of the Second Holding Company Merger, each outstanding share of FHN’s preferred stock will be converted into a share of a newly created, corresponding series of preferred stock of TD-US having terms as described in the Merger Agreement. Following the completion of the First Holding Company Merger, at such time as determined by TD, First Horizon Bank and TD Bank, N.A., a national banking association (“TDBNA”) will merge, with TDBNA surviving as a subsidiary of TD-US (the “Bank Merger” and together with the Holding Company Mergers, the “Proposed TD Merger”). The Proposed TD Merger is expected to be completed in the first quarter of TD's 2023 fiscal year, and is subject to customary closing conditions, including approvals from U.S. and Canadian regulatory authorities. FHN's shareholders approved the merger on May 31, 2022. Merger and integration expenses related to the Proposed TD Merger are recorded in FHN’s Corporate segment. Expenses recognized during the three and six months ended June 30, 2022 were approximately $25 million and $34 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 are 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. 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, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. FHN has identified contracts affected by reference rate reform and developed modification plans for those contracts. FHN has elected to utilize the optional expedients and exceptions provided by ASU 2020-04 for certain contract modifications that have already been implemented. For cash flow hedges that reference 1-Month USD LIBOR, FHN has applied expedients related to 1) the assumption of probability of cash flows when reference rates are changed on hedged items 2) avoiding de-designation when critical terms (i.e., reference rates) change and 3) the allowed assumption of shared risk exposure for hedged items. For its 2022 cash flow hedges that reference 1-Month Term SOFR, FHN has 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 anticipates that it will continue to utilize the expedients and exceptions for future modifications in situations where they mitigate potential accounting outcomes that do not faithfully represent management’s intent or risk management activities, consistent with the purpose of the standard. The FASB has proposed an extension of the transition window for ASU 2020-04 until 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 Secure 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. Accounting Changes Issued But Not Currently Effective 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. Early adoption is permitted. FHN is evaluating the impact of ASU 2022-01 on its future hedging strategies. ASU 2022-02 Also 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. Early adoption is permitted. For the transition method related to the recognition and measurement of TDRs, FHN has the option to apply a modified retrospective transition, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption. Otherwise, provisions in this ASU will be applied prospectively. FHN is evaluating the impact of ASU 2022-02, and is not currently able to reasonably estimate the impact the adoption will have on its consolidated financial position, results of operations, or cash flows.

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, as amended, for the year ended December 31, 2021. 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.

Pending Merger

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”), TD Bank US Holding Company, a Delaware corporation and indirect, wholly owned subsidiary of TD (“TD-US”), and Falcon Holdings Acquisition Co., a Delaware corporation and wholly owned subsidiary of TD-US (“Merger Sub”).

Pursuant to the TD Merger Agreement, FHN and Merger Sub will merge (the “First Holding Company Merger”), with FHN continuing as the surviving entity in the merger. Following the First Holding Company Merger, at the election of TD, FHN and TD-US will merge (the “Second Holding Company Merger” and, together with the First Holding Company Merger, the “Holding Company Mergers”), with TD-US continuing as the surviving entity in the merger.

Upon the terms and subject to the conditions set forth in the TD Merger Agreement, each share of FHN common stock, par value $0.625 per share, (“Company Common Stock”), issued and outstanding immediately prior to the effective time of the First Holding Company Merger (the “First Effective Time”) will be converted into the right to receive $25.00 (USD) per share in cash, without interest. If the transaction does not close on or before November 27, 2022, shareholders will receive an additional $0.65 per

share of Company Common Stock on an annualized basis (or approximately 5.4 cents per month) for the period from November 28, 2022 through the day immediately prior to the closing.

Each outstanding share of FHN’s preferred stock, series B, C, D, E and F, will remain issued and outstanding in connection with the First Holding Company Merger. If TD elects to effect the Second Holding Company Merger, at the effective time of the Second Holding Company Merger, each outstanding share of FHN’s preferred stock will be converted into a share of a newly created, corresponding series of preferred stock of TD-US having terms as described in the Merger Agreement.

Following the completion of the First Holding Company Merger, at such time as determined by TD, First Horizon Bank and TD Bank, N.A., a national banking association (“TDBNA”) will merge, with TDBNA surviving as a subsidiary of TD-US (the “Bank Merger” and together with the Holding Company Mergers, the “Proposed TD Merger”).

The Proposed TD Merger is expected to be completed in the first quarter of TD's 2023 fiscal year, and is subject to customary closing conditions, including approvals from U.S. and Canadian regulatory authorities. FHN's shareholders approved the merger on May 31, 2022. Merger and integration expenses related to the Proposed TD Merger are recorded in FHN’s Corporate segment. Expenses recognized during the three and six months ended June 30, 2022 were approximately $25 million and $34 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 are 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. 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, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship.

FHN has identified contracts affected by reference rate reform and developed modification plans for those contracts. FHN has elected to utilize the optional expedients and exceptions provided by ASU 2020-04 for certain contract modifications that have already been implemented. For cash flow hedges that reference 1-Month USD LIBOR, FHN has applied expedients related to 1) the assumption of probability of cash flows when reference rates are changed on hedged items 2) avoiding de-designation when critical terms (i.e., reference rates) change and 3) the allowed assumption of shared risk exposure for hedged items. For its 2022 cash flow hedges that reference 1-Month Term SOFR, FHN has 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 anticipates that it will continue to utilize the expedients and exceptions for future modifications in situations where they mitigate potential accounting outcomes that do not faithfully represent management’s intent or risk management activities, consistent with the purpose of the standard.

The FASB has proposed an extension of the transition window for ASU 2020-04 until 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 Secure 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.

Accounting Changes Issued But Not Currently Effective

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. Early adoption is permitted. FHN is evaluating the impact of ASU 2022-01 on its future hedging strategies.

ASU 2022-02

Also 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. Early adoption is permitted. For the transition method related to the recognition and measurement of TDRs, FHN has the option to apply a modified retrospective transition, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption. Otherwise, provisions in this ASU will be applied prospectively. FHN is evaluating the impact of ASU 2022-02, and is not currently able to reasonably estimate the impact the adoption will have on its consolidated financial position, results of operations, or cash flows.