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Variable Interest Entities (Tables)
 12 Months Ended
Dec. 31, 2022
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: 
20222021
 (In millions)
Affordable housing tax credit investments included in other assets$1,238 $1,045 
Unfunded affordable housing tax credit commitments included in other liabilities511 348 
Loans and letters of credit commitments598 410 
Funded portion of loans and letters of credit commitments282 148 
202220212020
 (In millions)
Tax credits and other tax benefits recognized$180 $165 $164 
Tax credit amortization expense included in provision for income taxes149 139 133