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v3.25.2

Investment Securities - Schedule of FHN's Investment Securities (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 8,926 | $ 8,930
Gross Unrealized Gains | 12 | 1
Gross Unrealized Losses | (821) | (1,035)
Fair Value | 8,117 | 7,896
Amortized Cost | 1,245 | 1,270
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (162) | (187)
Fair Value | 1,083 | 1,083
Asset Pledged as Collateral |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 7,000 | 6,900
Amortized Cost | 1,200 | 1,300
Government agency issued MBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,139 | 4,223
Gross Unrealized Gains | 6 | 1
Gross Unrealized Losses | (399) | (522)
Fair Value | 3,746 | 3,702
Amortized Cost | 782 | 804
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (92) | (109)
Fair Value | 690 | 695
Government agency issued CMO |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,188 | 3,079
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (260) | (312)
Fair Value | 2,932 | 2,767
Amortized Cost | 463 | 466
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (70) | (78)
Fair Value | 393 | 388
Other U.S. government agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,223 | 1,234
Gross Unrealized Gains | 2 | 0
Gross Unrealized Losses | (123) | (161)
Fair Value | 1,102 | 1,073
States and municipalities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 376 | 394
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (39) | (40)
Fair Value | $ 337 | $ 354

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