| Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Cash and due from banks | 1,203 | 1,147 | 1,061 | 1,012 |
|---|
| Interest-bearing deposits with banks | 8,351 | 14,907 | 1,384 | 1,328 |
|---|
| Federal funds sold and securities purchased under agreements to resell | 445 | 641 | 482 | 719 |
|---|
| Trading securities | 1,176 | 1,601 | 1,375 | 1,412 |
|---|
| Securities available for sale at fair value | - | 8,707 | 8,836 | 8,391 |
|---|
| Securities held to maturity (fair value of $1,161 and $1,209, respectively) | - | 712 | 1,371 | 1,323 |
|---|
| Loans held for sale (including $68 and $51 at fair value, respectively) | 1,022 | 1,172 | 590 | 502 |
|---|
| Loans and leases | - | 54,859 | 58,102 | 61,292 |
|---|
| Allowance for loan and lease losses | - | 670 | 685 | 773 |
|---|
| Net loans and leases | - | 54,189 | 57,417 | 60,519 |
|---|
| Premises and equipment | 759 | 665 | 612 | 590 |
|---|
| Goodwill | 1,511 | 1,511 | 1,511 | 1,510 |
|---|
| Other intangible assets | 354 | 298 | 234 | 186 |
|---|
| Other assets | 4,072 | 3,542 | 4,080 | 4,169 |
|---|
| Total assets | 84,209 | 89,092 | 78,953 | 81,661 |
|---|
| Noninterest-bearing deposits | 22,173 | 27,883 | 23,466 | 17,204 |
|---|
| Interest-bearing deposits | 47,809 | 47,012 | 40,023 | 48,576 |
|---|
| Total deposits | 69,982 | 74,895 | 63,489 | 65,780 |
|---|
| Trading liabilities | 353 | 426 | 335 | 509 |
|---|
| Short-Term Debt | 2,198 | 2,124 | 2,506 | 2,549 |
|---|
| Term borrowings | 1,670 | 1,590 | 1,597 | 1,150 |
|---|
| Other liabilities | 1,699 | 1,563 | 2,479 | 2,382 |
|---|
| Total liabilities | 75,902 | 80,598 | 70,406 | 72,370 |
|---|
| Preferred Stock, Value, Issued | 470 | 520 | 1,014 | 520 |
|---|
| Common Stock, Value, Issued | 347 | 333 | 336 | 349 |
|---|
| Capital surplus | 5,074 | 4,743 | 4,840 | 5,351 |
|---|
| Retained earnings | 2,261 | 2,891 | 3,430 | 3,964 |
|---|
| Accumulated other comprehensive loss, net | -140 | -288 | -1,368 | -1,188 |
|---|
| FHN shareholders' equity | 8,307 | 8,494 | 8,547 | 9,291 |
|---|
| Noncontrolling interest | 295 | 295 | 295 | 295 |
|---|
| Total equity | 8,307 | 8,494 | 8,547 | 9,291 |
|---|
| Total liabilities and equity | 84,209 | 89,092 | 78,953 | 81,661 |
|---|