XML 44 R29.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Investment Securities (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Marketable Securities [Abstract] |
Schedule of FHN's Investment Securities | The following tables summarize FHN’s investment securities as of March 31, 2024 and December 31, 2023:
INVESTMENT SECURITIES AT MARCH 31, 2024
|  | March 31, 2024
(Dollars in millions) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Securities available for sale: |  |  |  |  |  |  |  |
Government agency issued MBS |  | $ | 4,972 |  |  | $ | 1 |  |  | $ | (622) |  |  | $ | 4,351 |
Government agency issued CMO |  | 2,435 |  |  | — |  |  | (350) |  |  | 2,085 |
Other U.S. government agencies |  | 1,295 |  |  | — |  |  | (162) |  |  | 1,133 |
States and municipalities |  | 624 |  |  | 2 |  |  | (47) |  |  | 579 |
Total securities available for sale (a) |  | $ | 9,326 |  |  | $ | 3 |  |  | $ | (1,181) |  |  | $ | 8,148 |
Securities held to maturity: |  |  |  |  |  |  |  |
Government agency issued MBS |  | $ | 841 |  |  | $ | — |  |  | $ | (110) |  |  | $ | 731 |
Government agency issued CMO |  | 470 |  |  | — |  |  | (70) |  |  | 400 |
Total securities held to maturity |  | $ | 1,311 |  |  | $ | — |  |  | $ | (180) |  |  | $ | 1,131 |
(a)Includes $8.3 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
INVESTMENT SECURITIES AT DECEMBER 31, 2023
|  | December 31, 2023
(Dollars in millions) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Securities available for sale: |  |  |  |  |  |  |  |
Government agency issued MBS |  | $ | 5,061 |  |  | $ | 2 |  |  | $ | (579) |  |  | $ | 4,484 |
Government agency issued CMO |  | 2,487 |  |  | — |  |  | (341) |  |  | 2,146 |
Other U.S. government agencies |  | 1,321 |  |  | 2 |  |  | (151) |  |  | 1,172 |
States and municipalities |  | 627 |  |  | 3 |  |  | (41) |  |  | 589 |
Total securities available for sale (a) |  | $ | 9,496 |  |  | $ | 7 |  |  | $ | (1,112) |  |  | $ | 8,391 |
Securities held to maturity: |  |  |  |  |  |  |  |
Government agency issued MBS |  | $ | 852 |  |  | $ | — |  |  | $ | (96) |  |  | $ | 756 |
Government agency issued CMO |  | 471 |  |  | — |  |  | (66) |  |  | 405 |
Total securities held to maturity |  | $ | 1,323 |  |  | $ | — |  |  | $ | (162) |  |  | $ | 1,161 |
(a)Includes $8.9 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 March 31, 2024 is provided below:
DEBT SECURITIES PORTFOLIO MATURITIES |
| Held to Maturity |  | Available for Sale |
(Dollars in millions) | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value |
Within 1 year | $ | — |  |  | $ | — |  |  | $ | 49 |  |  | $ | 48 |  |
After 1 year through 5 years | — |  |  | — |  |  | 129 |  |  | 120 |  |
After 5 years through 10 years | — |  |  | — |  |  | 372 |  |  | 339 |  |
After 10 years | — |  |  | — |  |  | 1,369 |  |  | 1,205 |  |
Subtotal | — |  |  | — |  |  | 1,919 |  |  | 1,712 |  |
Government agency issued MBS and CMO (a) | 1,311 |  |  | 1,131 |  |  | 7,407 |  |  | 6,436 |  |
Total | $ | 1,311 |  |  | $ | 1,131 |  |  | $ | 9,326 |  |  | $ | 8,148 |  |
(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 March 31, 2024 and December 31, 2023: AFS INVESTMENT SECURITIES WITH UNREALIZED LOSSES
|  | As of March 31, 2024
|  | Less than 12 months |  | 12 months or longer |  | Total
(Dollars in millions) |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Government agency issued MBS |  | $ | 59 |  |  | $ | (1) |  |  | $ | 4,224 |  |  | $ | (621) |  |  | $ | 4,283 |  |  | $ | (622) |
Government agency issued CMO |  | 11 |  |  | — |  |  | 2,057 |  |  | (350) |  |  | 2,068 |  |  | (350) |
Other U.S. government agencies |  | 216 |  |  | (4) |  |  | 874 |  |  | (158) |  |  | 1,090 |  |  | (162) |
States and municipalities |  | 34 |  |  | — |  |  | 460 |  |  | (47) |  |  | 494 |  |  | (47) |
Total |  | $ | 320 |  |  | $ | (5) |  |  | $ | 7,615 |  |  | $ | (1,176) |  |  | $ | 7,935 |  |  | $ | (1,181) |
|  | As of December 31, 2023
|  | Less than 12 months |  | 12 months or longer |  | Total
(Dollars in millions) |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Government agency issued MBS |  | $ | 140 |  |  | $ | (2) |  |  | $ | 4,231 |  |  | $ | (577) |  |  | $ | 4,371 |  |  | $ | (579) |
Government agency issued CMO |  | 32 |  |  | — |  |  | 2,098 |  |  | (341) |  |  | 2,130 |  |  | (341) |
Other U.S. government agencies |  | 114 |  |  | (2) |  |  | 905 |  |  | (149) |  |  | 1,019 |  |  | (151) |
States and municipalities |  | 14 |  |  | — |  |  | 465 |  |  | (41) |  |  | 479 |  |  | (41) |
Total |  | $ | 300 |  |  | $ | (4) |  |  | $ | 7,699 |  |  | $ | (1,108) |  |  | $ | 7,999 |  |  | $ | (1,112) |

X
- Definition This item represents the entire disclosure related to reconciling the amortized cost basis and aggregate fair value of the entity's available-for-sale and held-to-maturity investment securities. + References No definition available. + Details
Name: | fhn_ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturityTableTextBlock
Namespace Prefix: | fhn_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration