Document and Entity Information
Sep. 21, 2023
Document And Entity Information [Line Items]  
Entity Registrant Name REGIONS FINANCIAL CORP
Amendment Flag false
Entity Central Index Key 0001281761
Document Type 8-K
Document Period End Date Sep. 21, 2023
Entity Incorporation State Country Code DE
Entity File Number 001-34034
Entity Tax Identification Number 63-0589368
Entity Address, Address Line One 1900 Fifth Avenue North
Entity Address, City or Town Birmingham
Entity Address, State or Province AL
Entity Address, Postal Zip Code 35203
City Area Code (800)
Local Phone Number 734-4667
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, $.01 par value
Trading Symbol RF
Security Exchange Name NYSE
Series B Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary Shares, each representing a 1/40th Interest in a Share of 6.375% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol RF PRB
Security Exchange Name NYSE
Series C Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary Shares, each representing a 1/40th Interest in a Share of 5.700% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C
Trading Symbol RF PRC
Security Exchange Name NYSE
Series E Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary Shares, each representing a 1/40th Interest in a Share of 4.45% Non-Cumulative Perpetual Preferred Stock, Series E
Trading Symbol RF PRE
Security Exchange Name NYSE