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Document and Entity Information
Apr. 28, 2021
Document And Entity Information [Line Items]  
Entity Registrant Name HANCOCK WHITNEY CORP
Amendment Flag false
Entity Central Index Key 0000750577
Document Type 8-K
Document Period End Date Apr. 28, 2021
Entity Incorporation State Country Code MS
Entity File Number 001-36872
Entity Tax Identification Number 64-0693170
Entity Address, Address Line One One Hancock Plaza
Entity Address, Address Line Two 2510 14th Street
Entity Address, City or Town Gulfport
Entity Address, State or Province MS
Entity Address, Postal Zip Code 39501
City Area Code (228)
Local Phone Number 868-4000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock Dollar Three Point Thirty Three Par Value [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common stock, par value $3.33 per share
Trading Symbol HWC
Security Exchange Name NASDAQ
Six Point Twenty Five Percentage Subordinated Notes [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.25% Subordinated Notes
Trading Symbol HWCPZ
Security Exchange Name NASDAQ
Five Point Ninety Five Percentage Subordinated Notes [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 5.95% Subordinated Notes
Trading Symbol HWCPL
Security Exchange Name NASDAQ