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Regulatory Capital and Restrictions (Tables) | 12 Months Ended
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Dec. 31, 2023
Broker-Dealer [Abstract] |
Schedule of Actual Capital Amounts And Ratios | The actual capital amounts and ratios of FHN and First Horizon Bank are presented in the following table. Table 8.12.1 CAPITAL AMOUNTS & RATIOS
(Dollars in millions) |  | First Horizon Corporation |  | First Horizon Bank
|  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2023 |  |  |  |  |  |  |  |
Actual: |  |  |  |  |  |  |  |
Total Capital |  | $ | 9,922 |  | 13.96% |  | $ | 9,303 |  | 13.17%
Tier 1 Capital |  | 8,825 |  | 12.42 |  | 8,350 |  | 11.82
Common Equity Tier 1 |  | 8,104 |  | 11.40 |  | 8,055 |  | 11.40
Leverage |  | 8,825 |  | 10.69 |  | 8,350 |  | 10.20
Minimum Requirement for Capital Adequacy Purposes: |  |  |  |  |  |  |  |
Total Capital |  | 5,686 |  | 8.00 |  | 5,651 |  | 8.00
Tier 1 Capital |  | 4,264 |  | 6.00 |  | 4,238 |  | 6.00
Common Equity Tier 1 |  | 3,198 |  | 4.50 |  | 3,179 |  | 4.50
Leverage |  | 3,302 |  | 4.00 |  | 3,276 |  | 4.00
Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  | 7,064 |  | 10.00
Tier 1 Capital |  |  |  |  |  | 5,651 |  | 8.00
Common Equity Tier 1 |  |  |  |  |  | 4,591 |  | 6.50
Leverage |  |  |  |  |  | 4,095 |  | 5.00
December 31, 2022 |  |  |  |  |  |  |  |
Actual: |  |  |  |  |  |  |  |
Total Capital |  | $ | 9,222 |  | 13.33% |  | $ | 8,532 |  | 12.41%
Tier 1 Capital |  | 8,247 |  | 11.92 |  | 7,700 |  | 11.20
Common Equity Tier 1 |  | 7,032 |  | 10.17 |  | 7,405 |  | 10.77
Leverage |  | 8,247 |  | 10.36 |  | 7,700 |  | 9.76
Minimum Requirement for Capital Adequacy Purposes: |  |  |  |  |  |  |  |
Total Capital |  | 5,533 |  | 8.00 |  | 5,498 |  | 8.00
Tier 1 Capital |  | 4,150 |  | 6.00 |  | 4,124 |  | 6.00
Common Equity Tier 1 |  | 3,112 |  | 4.50 |  | 3,093 |  | 4.50
Leverage |  | 3,183 |  | 4.00 |  | 3,157 |  | 4.00
Minimum Requirement to be Well Capitalized Under Prompt Corrective Action Provisions: |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  | 6,873 |  | 10.00
Tier 1 Capital |  |  |  |  |  | 5,498 |  | 8.00
Common Equity Tier 1 |  |  |  |  |  | 4,467 |  | 6.50
Leverage |  |  |  |  |  | 3,946 |  | 5.00

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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