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Long-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2023
Long-term Borrowings [Abstract] |
Schedule of Long-term Debt Instruments | Long-term borrowings at December 31 consist of the following:
| 2023 |  | 2022
| (In millions)
Regions Financial Corporation (Parent): |  |  |
2.25% senior notes due May 2025 | $ | 747 |  |  | $ | 747 |
1.80% senior notes due August 2028 | 646 |  |  | 646
7.75% subordinated notes due September 2024 | 100 |  |  | 100 |
6.75% subordinated debentures due November 2025 | 153 |  |  | 153 |
7.375% subordinated notes due December 2037 | 298 |  |  | 298 |
Valuation adjustments on hedged long-term debt | (112) |  |  | (158) |
| 1,832 |  |  | 1,786 |
Regions Bank: |  |  |
6.45% subordinated notes due June 2037 | 496 |  |  | 496 |
Other long-term debt | 2 |  |  | 2 |
| 498 |  |  | 498 |
| $ | 2,330 |  |  | $ | 2,284 |
Schedule of Maturities of Long-term Debt | The aggregate amount of contractual maturities of all long-term debt in each of the next five years and thereafter is as follows:
| Year Ended December 31
| Regions Financial Corporation (Parent) |  | Regions Bank
| (In millions)
2024 | $ | 100 |  |  | $ | — |
2025 | 859 |  |  | — |
2026 | — |  |  | — |
2027 | — |  |  | — |
2028 | 575 |  |  | — |
Thereafter | 298 |  |  | 498 |
| $ | 1,832 |  |  | $ | 498 |

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