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Variable Interest Entities (Tables) | 12 Months Ended
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Dec. 31, 2023
Disclosure Variable Interest Entities Schedule Of Equity Method Investments [Abstract] |
Affordable Housing Tax Credit Investments | A summary of Regions’ affordable housing tax credit investments and related loans and letters of credit, representing Regions’ maximum exposure to loss as of December 31 is as follows:
| 2023 |  | 2022
| (In millions)
Affordable housing tax credit investments included in other assets | $ | 1,415 |  |  | $ | 1,238 |
Unfunded affordable housing tax credit commitments included in other liabilities | 592 |  |  | 511 |
Loans and letters of credit commitments | 730 |  |  | 598 |
Funded portion of loans and letters of credit commitments | 395 |  |  | 282 |
| 2023 |  | 2022 |  | 2021
| (In millions)
Tax credits and other tax benefits recognized | $ | 207 |  |  | $ | 180 |  |  | $ | 165 |
Tax credit amortization expense included in income tax expense | 166 |  |  | 149 |  |  | 139 |

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- Definition The entire disclosure for Affordable Housing Program (AHP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//942/tableOfContent + Details
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