75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Statements of Net Assets Available For Benefits link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Statements of Changes In Net Assets Available For Benefits link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Description of the Plan link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Tax Status link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Related Party Transactions and Party in Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Risks and Uncertainties link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Plan Termination link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Fully Benefit-Responsive Investment Contract link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Reconciliation of Financial Statements to Form 5500 link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Reconciliation of Financial Statements to Form 5500 (Tables) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Description of the Plan - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Related Party Transactions and Party in Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Plan Termination - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Disclosure - Fully Benefit-Responsive Investment Contract - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Disclosure - Fair Value Measurements - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75240 - Disclosure - Fair Value Measurements - Summary of Plan's Assets by Level, within Fair Value Hierarchy, Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 75250 - Disclosure - Reconciliation of Financial Statements to Form 5500 - Summary of Reconciliation of Net Assets (Details) link:presentationLink link:calculationLink link:definitionLink 75260 - Disclosure - Reconciliation of Financial Statements to Form 5500 - Summary of Reconciliation of Increase in Net Assets (Details) link:presentationLink link:calculationLink link:definitionLink 75270 - Disclosure - Schedule of Assets (Held at End of Year) (Details) link:presentationLink link:calculationLink link:definitionLink 75270 - Disclosure - Schedule of Assets (Held at End of Year) (Details) [Default] link:presentationLink link:calculationLink link:definitionLink Fixed Income Funds [Member] Fixed Income EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions to net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants Ebp Contractual Obligation Ebp Contractual Obligation. Contractual obligations EBP, Allocation Status [Domain] EBP, Trustee [Member] Trustee Fair Value, Inputs, Level 2 [Member] Level 2 EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Forfeitures amounts used to reduce employer contributions and Plan expenses Net income per Form 5500 EBP, Form 5500 Caption, Net Income (Loss) EBP, Tax Status [Abstract] Description of the Plan EBP, Description of Plan [Text Block] Investment, Identifier [Axis] EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Description of Plan [Line Items] EBP, Employer Contribution, Matching Percentage Safe harbor matching percentage EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Fair Value and NAV [Abstract] EBP, Accounting Policy [Line Items] Employee benefit plan, plan termination, participants percentage vested in accounts Employee benefit plan, plan termination, participants percentage vested in accounts. Percentage vested by participants, if Plan is terminated Equity Funds [Member] Equity EBP, Schedule of Asset Held for Investment [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] Option to defer additional compensation Option to defer additional compensation. EBP, Allocation Status [Axis] EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Employee benefit plan, note receivable from participant, account, maximum borrowing, amount Common Collective Trust [Member] Collective Trust Funds Employee Benefit Plan, Pension Plan, Description Employee benefit plan, pension plan description. Employee benefit plan, pension plan description Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total Employer Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Administrative fees EBP, Form 5500 Caption, Total Administrative Expenses EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Employee benefit plan, note receivable from participant, account, minimum borrowing, amount Payment of Benefits EBP, Payment to Participant [Policy Text Block] Employee Benefit Plan Payment of Benefits Description Employee benefit plan payment of benefits description. Employee benefit plan payment of benefits description EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution, Total Change in loans deemed distributed EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] Employee benefit plan distributions automatically in form of lump sum payment for vested participant account balance Employee benefit plan distributions automatically in form of lump sum payment for vested participant account balance. Employee benefit plan distributions automatically in form of lump sum payment for vested participant account balance EBP, Investment, Current Value, Type [Extensible Enumeration] Investment Type [Axis] Employee Benefit Plan Appreciation In Fair Value of Participants Investments Employee benefit plan appreciation in fair value of participants' investments. Appreciation in fair value of participants' investments Document Type Entity Central Index Key EBP, Fully Benefit-Responsive Investment Contract, Limitation on Transacting at Contract Value, Description Employee benefit plan, fully benefit-responsive investment contract, limitation on transacting at contract value, description EBP, Forfeited Nonvested Account, Decrease from Administrative Expense Forfeited amounts available for reducing future employer contributions and Plan expenses EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition EBP, Contribution, Participating Employer [Axis] EBP, Subsequent Event [Table] EBP, Accounting Policy [Table] EBP, Subsequent Event [Abstract] Basis of Presentation EBP, Basis of Accounting [Policy Text Block] Current Fiscal Year End Date EBP, Description of Plan [Table] EBP, Form 5500 Caption, Earnings on Investments, Total Dividends Dividends EBP, Employer, Common Stock [Member] Employer Securities Hancock Whitney Corporation Common Stock Dividends and interest EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total Employee benefit plan participant loan, maturity date description. Employee Benefit Plan, Participant Loan, Maturity Date Description Notes Receivables from participants maturity date description Registered Investment Companies [Member] Registered Investment Companies. Registered Investment Companies Net assets per Form 5500 EBP, Form 5500 Caption, Net Assets EBP, Investment, Number of Shares EBP, investment, number of shares/units Plan owned, shares Minimum [Member] Minimum EBP, Related Party and Party-in-Interest Transactions [Text Block] Related Party Transactions and Party in Interest Transactions EBP, Change in Net Asset Available for Benefit, Increase Total additions Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Administrative Expenses EBP, Expense [Policy Text Block] Employee benefit plans vested percentage Employee benefit plans vested percentage. Employee benefit plans vested percentage Document Information [Line Items] EBP, Statement of Net Asset Available for Benefit [Abstract] Employee Benefit Plan Investment value Employee Benefit Plan Investment value Plan owned, Value Contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] EBP, Tax Determination Letter, Date Employee benefit plan, tax determination letter, date EBP, Participant Contribution, Automatic, Deferral Rate Employee benefit plan participant contribution, automatic, deferral rate EBP, Contribution, Participating Employer [Domain] Fully Benefit-Responsive Investment Contract EBP, Fully Benefit-Responsive Investment Contract [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Total investments at fair value Investments, at fair value EBP, Use of Estimate [Policy Text Block] Use of Estimates Entity [Domain] EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] EBP, Description of Plan and Accounting Change [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Summary of Reconciliation of Net Assets and Increase in Net Assets Notes Receivables from participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution First One percentage of Compensation Deferred [Member] First one percentage of Compensation deferred. First 1% of Compensation Deferred by a Participant EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statistical Measurement [Domain] EBP, Note Receivable from Participant Notes receivable from participants Document Period End Date EBP, Risk and Uncertainty [Table] Fair Value Hierarchy and NAV [Domain] EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Employee benefit plan, note receivable from participant, account, maximum borrowing, of thr account balance, percentage EBP, Tax Determination Letter, Obtained [true false] EBP, Related Party and Party-in-Interest Transactions [Table] Plan Termination EBP, Plan Termination [Text Block] EBP, Subsequent Event [Text Block] Subsequent Events Cover [Abstract] Attained age of Fifty [Member] Attained age of Fifty. Attained Age 50 Investments [Domain] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment income EBP, Risk and Uncertainty [Abstract] Additional catch up contribution provisions Additional catch up contribution provisions EBP, Net Asset Available for Benefit EBP, Net Asset Available for Benefit, Total Beginning of year End of year Net assets available for benefits per the financial statements Employee Benefit Plan Notes Receivable from Participants Interest Rate Terms Employee benefit plan notes receivable from participants interest rate terms. Employee benefit plan notes receivable from participants interest rate terms EBP, Investment, Fair Value and NAV [Table Text Block] Summary of Plan's Assets by Level, within Fair Value Hierarchy, Measured at Fair Value on Recurring Basis EBP, Fully Benefit-Responsive Investment Contract, Description Employee benefit plan, fully benefit-responsive investment contract, description Net assets available for Plan benefits EBP, Net Asset Available for Benefit [Abstract] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value Less After April 1, 2024 [Member] Less after April 1, 2024. Less After April 1, 2024 EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets (Held at End of Year) EBP, Fully Benefit-Responsive Investment Contract [Abstract] EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total Unfunded commitments EBP, Fair Value, Investment, NAV, Unfunded Commitment EBP, Employer Contribution, Participant Compensation Matched, Percentage Percentage of compensation deferred EBP, Statement of Change in Net Asset Available for Benefit [Table] Net assets available for Plan benefits EBP, Asset EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Employee benefit plan, participant contribution, pretax, maximum compensation percentage EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] Document Information [Table] Legal Entity [Axis] EBP, Plan Name EBP, Risk and Uncertainty [Line Items] EBP 003 EBP003 [Member] EBP003. EBP, Asset [Abstract] ASSETS EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Net investment income EBP, Investment, Fair Value and NAV [Table] Employee Benefit Plan Participant Age For to Meet Minimum Distribution Requirements Employee benefit plan participant age for to meet minimum distribution requirements. Employee benefit plan participant age for to meet minimum distribution requirements Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total Investments Exclude Collective Trust Funds [Member] Total Investments Exclude Collective Trust Funds. Total Investments Exclude Collective Trust Funds EBP, Asset Held for Investment Total assets (Held at End of Year) as filed on Form 5500 EBP, Subsequent Event [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Employee benefit plan participant contribution annual automatic increase in deferral rate Employee benefit plan participant contribution annual automatic increase in deferral rate. Employee benefit plan participant contribution annual automatic increase in deferral rate EBP, Tax Status [Text Block] Tax Status Maximum Maximum [Member] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Loans deemed distributed EBP, Reconciliation to Form 5500, Note Receivable, Deemed Distribution Entity Registrant Name Employee Benefit Plan, Catch Up Contribution Employee benefit plan, catch up contribution. Catch-up contributions EBP, Asset Held for Investment, Participant Loan, Interest Rate Notes Receivables from participants interest rate Less Prior to April 1, 2024 Less Prior to April 1, 2024 [Member] Less prior to April 1, 2024. EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Reconciliation of Financial Statements to Form 5500 EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Axis] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Maximum Deferral compensation Maximum Deferral compensation Defer compensation EBP, Risk and Uncertainty [Text Block] Risks and Uncertainties Employee Benefit Plan Description of eligibility criteria Employee benefit plan description of eligibility criteria. Description of eligible to participate in the plan Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Next Five Percentage of Eligible Compensation Deferred [Member] Next five percentage of eligible compensation deferred. Next 5% of Eligible Compensation Deferred Attained Age of Sixty through Sixty Three [Member] Attained age of sixty through sixty three. Attained Age of 60 through 63 Fair Value, Inputs, Level 1 [Member] Level 1 Employee EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Total EBP, Tax Status [Line Items] Entity Tax Identification Number EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Increase in net assets available for Plan benefits Total increase in net assets available for benefits per the financial statements EBP, Tax Status [Table] EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Fully benefit-responsive investment contract, at contract value EBP, Asset Held for Investment, Party-in-Interest [true false] VANGUARD TOTAL BOND MARKET INDEX INST. VANGUARD 500 INDEX ADMIRAL. VANGUARD 500 INDEX ADMIRAL [Member] COHEN & STEERS GLOBAL REALTY A. VANGUARD SMALL CAP INDEX I. FLEXPATH INDEX MOD 2055 FUND CL M. FLEXPATH INDEX AGG 2045 FUND CL M. FLEXPATH INDEX CNSRV 2065 FUND CL M [Member] FLEXPATH INDEX CNSRV 2035 FUND CL M. AMERICAN FUNDS AMERICAN MUTUAL R5. HANCOCK WHITNEY CORPORATION COMMON STOCK [Member] VANGUARD TOTAL BOND MARKET INDEX INST [Member] FLEXPATH INDEX MOD RETIREMENT FUND M. KEY GUARANTEED PORTFOLIO FUND [Member] FLEXPATH INDEX CONSERVATIVE 2045 M. FLEXPATH INDEX CNSRV RETIREMENT FUND M [Member] VANGUARD TOTAL INTL BD IDX ADMIRAL. VANGUARD SHORTTERM FEDERAL ADM [Member] KEY GUARANTEED PORTFOLIO FUND. FLEXPATH INDEX CNSRV 2055 FUND CL M. FLEXPATH INDEX AGG 2045 FUND CL M [Member] NOMURA SMALL CAP CORE INSTITUTIONAL. BLACKROCK HIGH YIELD INSTL. FLEXPATH INDEX AGG 2055 FUND CL M. FLEXPATH INDEX MOD 2065 FUND CL M. COHEN & STEERS GLOBAL REALTY A [Member] FLEXPATH INDEX AGG 2035 FUND CL M [Member] FLEXPATH INDEX CONSERVATIVE 2045 M [Member] FLEXPATH INDEX AGG 2065 FUND CL M [Member] FEDERATED HERMES TOTAL RETURN BOND INSTL. HANCOCK WHITNEY CORPORATION COMMON STOCK. VANGUARD INFLATIONPROTECTED SECS INV. FEDERATED HERMES MDT SMALL CP CORE IS [Member] NOMURA SMALL CAP CORE INSTITUTIONAL [Member] FLEXPATH INDEX MOD 2045 FUND CL M [Member] VANGUARD INFLATIONPROTECTED SECS INV [Member] FLEXPATH INDEX CNSRV RETIREMENT FUND M. FLEXPATH INDEX AGG 2055 FUND CL M [Member] FEDERATED HERMES TOTAL RETURN BOND INSTL [Member] FEDERATED HERMES MDT SMALL CP CORE IS. FLEXPATH INDEX AGG RETIREMENT FUND CL M [Member] FLEXPATH INDEX AGG 2035 FUND CL M. Fully Benefit Responsive Investment Contract [Member] BLACKROCK HIGH YIELD INSTL [Member] FLEXPATH INDEX MOD 2035 FUND CL M [Member] FLEXPATH INDEX MOD RETIREMENT FUND M [Member] FEDERATED HERMES INTERNATIONAL LEADER ISFGFLX. FLEXPATH INDEX MOD 2045 FUND CL M. AB LARGE CAP GROWTH ADV [Member] FEDERATED HERMES MDT LARGE CAP VALUE IS. VANGUARD MID CAP INDEX I [Member] VANGUARD MID CAP INDEX I. VANGUARD DEVELOPED MARKETS IDX INSTL. FLEXPATH INDEX AGG 2065 FUND CL M. AB LARGE CAP GROWTH ADV. FLEXPATH INDEX CNSRV 2055 FUND CL M [Member] FLEXPATH INDEX AGG RETIREMENT FUND CL M. FLEXPATH INDEX CNSRV 2035 FUND CL M [Member] VANGUARD TOTAL INTL BD IDX ADMIRAL [Member] FLEXPATH INDEX MOD 2065 FUND CL M [Member] FLEXPATH INDEX MOD 2055 FUND CL M [Member] FLEXPATH INDEX MOD 2035 FUND CL M. FEDERATED HERMES MDT LARGE CAP VALUE IS [Member] FEDERATED HERMES INTERNATIONAL LEADER ISFGFLX [Member] VANGUARD SHORTTERM FEDERAL ADM. VANGUARD SMALL CAP INDEX I [Member] VANGUARD DEVELOPED MARKETS IDX INSTL [ Member] Fully Benefit Responsive Investment Contract. FLEXPATH INDEX CNSRV 2065 FUND CL M. AMERICAN FUNDS AMERICAN MUTUAL R5 [Member]