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Variable Interest Entities (Tables)
12 Months Ended
Dec. 31, 2021
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: 
20212020
 (In millions)
Affordable housing tax credit investments included in other assets$1,045 $975 
Unfunded affordable housing tax credit commitments included in other liabilities348 249 
Loans and letters of credit commitments410 243 
Funded portion of loans and letters of credit commitments148 130 
202120202019
 (In millions)
Tax credits and other tax benefits recognized$165 $164 $165 
Tax credit amortization expense included in provision for income taxes139 133 131