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Variable Interest Entities (Tables)
12 Months Ended
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: 
20232022
 (In millions)
Affordable housing tax credit investments included in other assets$1,415 $1,238 
Unfunded affordable housing tax credit commitments included in other liabilities592 511 
Loans and letters of credit commitments730 598 
Funded portion of loans and letters of credit commitments395 282 
202320222021
 (In millions)
Tax credits and other tax benefits recognized$207 $180 $165 
Tax credit amortization expense included in income tax expense166 149 139