| Document And Entity Information | Oct. 15, 2024 |
| Document Information [Line Items] | |
| Entity Registrant Name | HANCOCK WHITNEY CORPORATION |
| Amendment Flag | false |
| Entity Central Index Key | 0000750577 |
| Document Type | 8-K |
| Document Period End Date | Oct. 15, 2024 |
| Entity Incorporation, State or Country Code | MS |
| Securities Act File Number | 001-36872 |
| Entity Tax Identification Number | 64-0693170 |
| Entity Address, Address Line One | Hancock Whitney 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 Par Value Dollar Three Point Three Three Per Share [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | COMMON STOCK, $3.33 PAR VALUE |
| Trading Symbol | HWC |
| Security Exchange Name | NASDAQ |
| Senior Subordinated Notes 1 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 6.25% SUBORDINATED NOTES |
| Trading Symbol | HWCPZ |
| Security Exchange Name | NASDAQ |
