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Variable Interest Entities - Summary Of VIE Consolidated By FHN (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets |  |
Other assets | $ 4,096 | $ 4,169
Liabilities: |  |
Other liabilities | 2,550 | 2,382
Rabbi Trusts used for Deferred Compensation Plans |  |
Assets |  |
Other assets | 186 | 177
Liabilities: |  |
Other liabilities | $ 160 | $ 150

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