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Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions (Tables) | 3 Months Ended
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Mar. 31, 2024
Offsetting [Abstract] |
Schedule of 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 March 31, 2024 and December 31, 2023:
SECURITIES PURCHASED UNDER AGREEMENTS TO RESELL
|  |  |  |  |  |  |  | Gross amounts not offset in the Balance Sheets |  |
(Dollars in millions) |  | Gross amounts of recognized assets |  | Gross amounts offset in the Balance Sheets |  | Net amounts of assets presented in the Balance Sheets |  | Offsetting securities sold under agreements to repurchase |  | Securities collateral (not recognized on FHN’s Balance Sheets) |  | Net amount
Securities purchased under agreements to resell: |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2024 |  | $ | 453 |  |  | $ | — |  |  | $ | 453 |  |  | $ | — |  |  | $ | (450) |  |  | $ | 3 |
December 31, 2023 |  | 519 |  |  | — |  |  | 519 |  |  | — |  |  | (516) |  |  | 3 |
Schedule of 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 March 31, 2024 and December 31, 2023:
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE
|  |  |  |  |  |  |  | Gross amounts not offset in the Balance Sheets |  |
(Dollars in millions) |  | Gross amounts of recognized liabilities |  | Gross amounts offset in the Balance Sheets |  | Net amounts of liabilities presented in the Balance Sheets |  | Offsetting securities purchased under agreements to resell |  | Securities/ government guaranteed loans collateral |  | Net amount
Securities sold under agreements to repurchase: |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2024 |  | $ | 1,828 |  |  | $ | — |  |  | $ | 1,828 |  |  | $ | — |  |  | $ | (1,828) |  |  | $ | — |
December 31, 2023 |  | 1,921 |  |  | — |  |  | 1,921 |  |  | — |  |  | (1,921) |  |  | — |
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 March 31, 2024 and December 31, 2023:
MATURITIES OF SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE
|  | March 31, 2024
(Dollars in millions) |  | Overnight and Continuous |  | Up to 30 Days |  | Total
Securities sold under agreements to repurchase: |  |  |  |  |  |
Government agency issued MBS |  | $ | 1,655 |  |  | $ | — |  |  | $ | 1,655 |
Government agency issued CMO |  | 118 |  |  | — |  |  | 118 |
Other U.S. government agencies |  | 55 |  |  | — |  |  | 55 |
Total securities sold under agreements to repurchase |  | $ | 1,828 |  |  | $ | — |  |  | $ | 1,828 |
|  | December 31, 2023
(Dollars in millions) |  | Overnight and Continuous |  | Up to 30 Days |  | Total
Securities sold under agreements to repurchase: |  |  |  |  |  |
Government agency issued MBS |  | $ | 1,717 |  |  | $ | — |  |  | $ | 1,717 |
Government agency issued CMO |  | 161 |  |  | — |  |  | 161 |
Other U.S. government agencies |  | 43 |  |  | — |  |  | 43 |
Total securities sold under agreements to repurchase |  | $ | 1,921 |  |  | $ | — |  |  | $ | 1,921 |

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- Definition Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties [Table Text Block] + References No definition available. + Details
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- Definition Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company [Table Text Block] + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of the nature and risks of short-term collateralized financing obtained through repurchase agreements, securities lending transactions and repurchase-to-maturity transactions, accounted for as secured borrowings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481420/860-30-50-7 + Details
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