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Consolidated Statements of Changes in Equity (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Equity, Class of Treasury Stock [Line Items] |  |  |
Common stock - cash dividends declared per share (in dollars per share) | $ 0.60 | $ 0.60 | $ 0.60
First Horizon Share Repurchase Program |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Common stock repurchased under share repurchase programs |  |  | $ 401
Preferred Stock |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Number of shares issued in transaction (in shares) |  | 4,936 | 1,500
Preferred stock issuance, net of offering cost (in dollars per share) |  | $ 100,000 | $ 100,000

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