Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted-average common shares outstanding: Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Fee revenue, percentage Revenue From Contract With Customer Excluding Assessed Tax Percentage Revenue from contract with customer excluding assessed tax percentage. Maximum Maximum [Member] Statistical Measurement Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Diluted net earnings attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period CSV of COLI Contracts C S V Of COLI Contracts [Member] CSV of Coli Contracts [Member] Schedule of Maturities of Lease Liabilities Lessee Operating And Finance Lease Liability Maturity [Table Text Block] Lessee operating and finance lease liability maturity. Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument Financial Instrument [Axis] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Segment Reporting [Abstract] Segment Reporting [Abstract] 2028 Lessee, Operating Lease, Liability, to be Paid, Year One Payments of tax withholdings on restricted stock Payments of tax withholdings on restricted stock Payment, Tax Withholding, Share-Based Payment Arrangement Common stock: $0.01 par value, 150,000 shares authorized, 80,165 and 79,203 shares issued and 50,790 and 50,225 shares outstanding at July 31, 2026 and April 30, 2026, respectively Common Stocks, Including Additional Paid in Capital Compensation and benefits payable Employee-related Liabilities, Current Schedule of Long-term Debt, at Amortized Cost Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Deferred Compensation and Retirement Plans Retirement Benefits [Text Block] Leases Lessee, Finance Leases [Text Block] Restatement Determination Date Restatement Determination Date Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Contract assets-unbilled receivables Contract with Customer, Asset, after Allowance for Credit Loss 2028 Finance Lease, Liability, to be Paid, Year One Stock-based compensation APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Integration/acquisition costs Business Combination Acquisition And Integration Related Costs This element represents integration and acquisition-related costs incurred to effect a business combination and integrate it into the business which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Less: distributed and undistributed earnings to nonvested restricted stockholders Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Amendment Flag Amendment Flag Provision for doubtful accounts Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Principal payments on finance leases Financing cash flows from finance leases Finance Lease, Principal Payments Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Goodwill and Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Standby Letters of Credit Standby Letters of Credit [Member] Investments Investments [Domain] Leases [Abstract] Leases [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Debt Instrument Periodic Payment Start Date [Axis] Debt Instrument Periodic Payment Start Date [Axis] Debt Instrument Periodic Payment Start Date Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Credit loss for available for sales debt securities Provision For Credit Losses On Available For Sale Debt Securities Provision For Credit Losses On Available For Sale Debt Securities Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Beginning balance (in shares) Ending balance (in shares) Shares outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Basic (in shares) Basic weighted-average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Unvested obligations under deferred compensation plans Deferred Compensation Plans Unvested Obligations The amount of the liability included in the deferred compensation plans that is unvested and therefore the participants have not earned the right to. Investments and other assets Investments and Other Noncurrent Assets Number of reportable segments Number of business segments Number of Reportable Segments Total current liabilities Liabilities, Current 2031 Lessee, Operating Lease, Liability, to be Paid, Year Four EMEA EMEA [Member] Thereafter Finance Lease Liability Payments Due After Year Four Finance lease, liability, payments due, after year four. Entity Address, City or Town Entity Address, City or Town Number of solutions Number of Solutions Number of Solutions Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Credit Facilities Credit Facilities [Member] Credit facilities. Basic net earnings attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Sublease income Sublease Income Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income taxes and other receivables Income Taxes And Other Receivables, Current Income Taxes And Other Receivables, Current Subsequent Event Type Subsequent Event Type [Axis] Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Payments from cash on hand Payments To Acquire Businesses, Cash-On-Hand Payments To Acquire Businesses, Cash-On-Hand Recently Adopted Accounting Standards and Recent Accounting Standards - Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Schedule of Financial Highlights and Depreciation and Amortization By Reportable Segments Segment Reporting [Table Text Block] Noncontrolling Interest Noncontrolling Interest [Member] Use of Estimates and Uncertainties Use of Estimates, Policy [Policy Text Block] Premium on company-owned life insurance policies Payment to Acquire Life Insurance Policy, Investing Activities Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Reconciliation of Segment Adjusted EBITDA Segment Reporting, Reconciliation [Abstract] Income taxes payable Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Change in other assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Other Financial Institutions Other Financial Institutions [Member] Other Financial Institutions [Member] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Two Income Taxes & Other Receivables Income Taxes And Other Receivables Including Foreign Currency Forward Contracts Income Taxes And Other Receivables Including Foreign Currency Forward Contracts Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Security Exchange Name Security Exchange Name Debt instrument term Debt Instrument, Term Debt Instrument Periodic Payment Start Date [Domain] Debt Instrument Periodic Payment Start Date [Domain] Debt Instrument Periodic Payment Start Date [Domain] Workforce Solutions Workforce Solutions Segment [Member] Workforce Solutions Segment Purchase of marketable securities Payments to Acquire Marketable Securities Accumulated other comprehensive loss, net Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items Consolidation Items [Domain] Operating lease liability, current Operating Lease, Liability, Current 12 months or longer, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Schedule of Activity in Allowance for Credit Losses on Trade Receivables Accounts Receivable, Allowance for Credit Loss [Table Text Block] Nature of Business Segment Reporting, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Basic and Diluted Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Proceeds from sales/maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Earnings per common share attributable to Korn Ferry: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Earnings Per Share Disclosure [Table] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Compensation expense (reduction) Deferred Compensation Arrangement With Individual Compensation Expense (Income) The compensation expense or (income) recognized during the period pertaining to the deferred compensation arrangement. Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Income taxes payable Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name Sale of Stock Sale of Stock [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Deferred compensation and pension plan adjustments, net of tax Deferred Compensation and Pension Plan Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Borrowings outstanding Senior Unsecured Notes Long-Term Debt, Gross Credit Facility Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Diluted weighted-average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation Of Revenue [Line Items] Disaggregation of Revenue [Line Items] Credit Losses Allowance for Credit Losses [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Deferred compensation and other retirement plans Liability, Defined Benefit Plan, Noncurrent 2029 Finance Lease, Liability, to be Paid, Year Two Credit Loss [Abstract] Credit Loss [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from lines of credit Proceeds from Lines of Credit 2031 Finance Lease, Liability, to be Paid, Year Four Commercial paper Commercial Paper [Member] Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Fair Value Measurement Fair Value Measurements, Nonrecurring Value Measurement [Abstract] Obligations for which assets are held in trust Other Deferred Compensation Arrangements, Liability, Current and Noncurrent Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Operating cash flows from operating leases Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock, Common Treasury Stock, Common [Member] Schedule of Changes in Each Component of Accumulated Other Comprehensive Loss Comprehensive Income (Loss) [Table Text Block] Long-term debt arrangement Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Income tax provision tax rate Effective Income Tax Rate Reconciliation, Percent Total lease payments Lessee, Operating Lease, Liability, to be Paid Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Effect of dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Weighted-average, beginning balance (in usd per share) Weighted-average, ending balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Antidilutive Securities Antidilutive Securities [Axis] Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Schedule of Basic and Diluted Earnings per Common Share Attributable to Common Stockholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name Debt Instrument, Name [Domain] Segments Segment Reporting [Text Block] Minimum Minimum [Member] Investment Type Investment Type [Axis] Dividends paid to stockholders Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] AMERICAS Americas [Member] Cash and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Total stockholders' equity Beginning balance Ending balance Accumulated other comprehensive loss, net Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Net periodic benefit costs Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Number of performance obligations Number Of Performance Obligations, Standard Search Engagement Number Of Performance Obligations, Standard Search Engagement Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Intangible assets estimated useful lives Intangible Asset, Finite-Lived, Useful Life Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Segment Reporting [Line Items] Segment Reporting [Line Items] Term Loan Facility Term Loan Facility [Member] Term Loan Facility Sale/maturities of available-for-sale marketable securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Total unrecognized compensation cost related to non-vested awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments Segments [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Lender Name Lender Name [Axis] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Common Stock Common Stock Including Additional Paid in Capital [Member] Unearned compensation Increase Decrease In Unearned Compensation Increase Decrease In unearned compensation. Less: Unamortized discount and issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Unamortized debt issuance costs Debt Issuance Costs, Net Payments on life insurance policy loans Repayment Of Life Insurance Policy Loans Repayment of life insurance policy loans. Gain on marketable securities Marketable Security, Gain (Loss) Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Income taxes and other receivables Increase (Decrease) in Other Receivables Equity Component Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Total operating expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Debt instrument, interest rate Debt Instrument, Interest Rate, Stated Percentage Dividends paid to stockholders Dividends, Common Stock, Cash Total Korn Ferry stockholders' equity Equity, Attributable to Parent Other income, net Nonoperating Income (Expense) Equity securities, fair value Equity Securities, FV-NI, Current ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Business combination shares issued (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Cost Debt Securities, Available-for-Sale, Amortized Cost Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Total Finance Lease, Liability Thereafter Lessee Operating Lease Liability Payments Due After Year Four Lessee operating lease liability payments due after year four. Option to receive employee benefits by quarterly installments periods Option To Receive Employee Benefits By Quarterly Installments Periods Option to receive employee benefits by quarterly installments periods. Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Deferred income taxes Deferred Income Tax Expense (Benefit) Business Combination [Domain] Business Combination [Domain] Interest expense, net Interest expense, net Interest Income (Expense), Nonoperating Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] Fair value and unrealized losses on available for sale debt securities. Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Number of geographical regions Number of Geographical Regions Number of Geographical Regions AMS AMS [Member] AMS Unrealized losses arising during the period Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement [Abstract] Income Statement [Abstract] Employees stock purchased (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Document Transition Report Document Transition Report Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Expected long-term rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Deferred income taxes Deferred Income Tax Assets, Net ROU assets obtained in exchange for lease obligations: Right Of Use Assets Obtained In Exchange For Lease Obligations [Abstract] Right-of-use assets obtained in exchange for lease obligations. Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Unearned compensation Unearned Compensation Current The amount advanced to employees that we consider unearned compensation that will vest and therefore be expensed in within a year. Applicable margin on variable interest rate Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Finance lease cost Finance Lease Costs Finance lease costs. Total lease payments Finance Lease, Liability, to be Paid Restricted Stock Restricted Stock [Member] Accumulated Other Comprehensive Loss, Net Accumulated other comprehensive loss, net Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Expected cost recognized over weighted-average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Balance Sheet Classification Balance Sheet Related Disclosures [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted- Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Business combination shares, fair value Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Marketable securities, non-current Marketable Securities, Non- current Marketable Securities, Noncurrent Schedule of Supplemental Cash Flow Information Related to Leases Schedule Of Cash Flow Information Related To Leases [Table Text Block] Schedule of cash flow information related to leases. Total assets Assets Operating Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Schedule Of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Net periodic service credit amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Operating Segments Operating Segments [Member] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Segment Adjusted EBITDA Earnings Before Interest Tax Depreciation And Amortization Earnings Before Interest Tax Depreciation And Amortization Employee Stock Plans Share-Based Payment Arrangement [Text Block] Senior Unsecured Notes Senior Unsecured Notes [Member] Senior unsecured notes. Issuance of stock (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] Cash surrender value of company-owned life insurance policies, net of loans Cash Surrender Value of Life Insurance Total stock-based compensation expense Share-Based Payment Arrangement, Expense Marketable securities Marketable Securities, Current Marketable Securities, Current Other liabilities Other Liabilities, Noncurrent Goodwill Goodwill Retirement Plan Type Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Weighted-average, granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Contract liabilities, revenue recognized Contract with Customer, Liability, Revenue Recognized Gain on marketable securities Increase (decrease) in the fair value of marketable securities Equity Securities, FV-NI, Gain (Loss) Subsequent Event Type Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Operating lease liability, non-current Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Money market funds Money Market Funds [Member] Weighted-average, forfeited/expired (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Marketable securities unrealized loss, net of tax Unrealized Gains (Losses) on Marketable Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign currency translation adjustments Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Organization And Summary Of Significant Accounting Policies [Table] Organization And Summary Of Significant Accounting Policies [Table] Organization And Summary Of Significant Accounting Policies [Table] Diluted (in usd per share) Diluted earnings per share (in usd per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] Executive And Professional Search Executive And Professional Search [Member] Executive And Professional Search Adjustments to reconcile net income to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Total revenue Fee revenue Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Quarterly commitment fee on average daily unused amount of credit facilities Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Interest cost Defined Benefit Plan, Interest Cost Financial Instruments Financial Instruments [Domain] R P O R P O [Member] RPO. Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less: comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fee Revenue Revenue from Contract with Customer [Text Block] Issuance of stock Stock Issued During Period, Value, New Issues Proceeds from issuance of common stock in connection with an employee stock purchase plan Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Financial Instruments Financial Instruments Disclosure [Text Block] U.S. Treasury and Agency Securities U S Treasury And Agency Securities [Member] U S Treasury And Agency Securities Quarterly principal payments Debt Instrument, Periodic Payment, Principal Schedule Of Segment Reporting Information By Segment [Table] Segment Reporting [Table] Shares available for future issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Sale of Stock Sale of Stock [Axis] Cash Cash [Member] Schedule of Components of Lease Expense Lease, Cost [Table Text Block] Market Based Restricted Stock Market Based Restricted Stock [Member] Market Based Restricted Stock [Member] Marketable Securities Marketable Securities, Policy [Policy Text Block] All Trading Arrangements All Trading Arrangements [Member] Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Schedule of Financial Instruments and Balance Sheet Classification Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Schedule of Cash Dividends Declared Per Share Dividends Declared [Table Text Block] Fee revenue Service [Member] APAC Asia Pacific [Member] Revenue recognized, remaining performance obligation Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date 2027 (excluding the three months ended July 31, 2026) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Cash dividends declared per share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost Total equity investments Equity Securities [Member] Proceeds from life insurance policies Proceeds from Life Insurance Policy Corporate notes/bonds Corporate Bond Securities [Member] 4.625% Senior Unsecured Notes due 2027 Four Point Six Two Five Percent Senior Unsecured Notes Due Two Thousand Twenty Seven [Member] Four point six two five percent senior unsecured notes due two thousand twenty seven. Cash compensation, percentage Cash Compensation, Percentage Cash Compensation, Percentage Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Number of revenue recognition phases Number Of Revenue Phases Number Of Revenue Phases Marketable Securities, Current Debt Securities, Available-for-Sale, Current 12 months or longer, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Equity Components Equity Components Equity Components [Axis] Receivables due from clients Increase (Decrease) in Accounts Receivable Product and Service Product and Service [Domain] Disaggregation Of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Net income attributable to noncontrolling interest Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Deferred tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to Korn Ferry Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2030 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Shares repurchased during the period to pay for taxes (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Subsequent Events [Abstract] Subsequent Events [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Deferred compensation and pension plan adjustments, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Marketable securities classified as available-for-sale Marketable Securities 2030 Finance Lease, Liability, to be Paid, Year Three Line of Credit Facility, Lender Line of Credit Facility, Lender [Domain] Document Type Document Type Fair Value as of Grant Date Award Grant Date Fair Value Percentage of principal amount of debt redeemed Debt Instrument, Redemption Price, Percentage Schedule of Fair Value and Unrealized Losses on Available for Sale Debt Securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Search Search Segment [Member] Search Segment Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Consolidation Items Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Less than 12 months, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Talent & Organizational Solutions Talent And Organizational Solutions Segment [Member] Talent And Organizational Solutions Segment Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Line Items] Earnings Per Share Disclosure [Line Items] Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Schedule of Restricted Stock Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Corporate notes/bonds Corporate Notes Or Bonds [Member] Corporate Notes Or Bonds. Award Type Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Interest on lease liabilities Finance Lease, Interest Expense 2027 (excluding the three months ended July 31, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Gross CSV Cash Surrender Value Of Life Insurance Gross Cash Surrender Value of Life Insurance Gross Purchase of stock (in shares) Shares repurchased during the period (in shares) Treasury Stock, Shares, Acquired Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Contract liabilities-deferred revenue Contract with Customer, Liability Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Mutual funds Mutual Fund [Member] Marketable Securities, Non-Current Debt Securities, Available-for-Sale, Noncurrent Purchase of stock Shares repurchased during the period, value Treasury Stock, Value, Acquired, Cost Method Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Loans Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Finance lease cost Finance Lease Costs [Abstract] Finance lease costs. Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument Debt Instrument [Axis] Cash payment Payments to Acquire Businesses, Gross Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Compensation and benefits Labor and Related Expense Total lease cost Lease, Cost Allowance for Doubtful Accounts Credit Loss, Financial Instrument [Policy Text Block] ESPP Employee Stock [Member] Leases Lessee, Operating Leases [Text Block] Long-Term Debt, Type Long-Term Debt, Type [Domain] Basic (in usd per share) Basic earnings per share (in usd per share) Earnings Per Share, Basic Repurchases of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Statistical Measurement Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt Long-term borrowings, net of unamortized discount and debt issuance costs Long-Term Debt, Excluding Current Maturities Foreign currency translation Allowance For Doubtful Accounts Foreign Currency Translation Increase (Decrease) Allowance for doubtful accounts foreign currency translation. Short-term lease cost Short-Term Lease, Cost Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Receivables due from clients, net of allowance for doubtful accounts of $44,591 and $42,527 at July 31, 2026 and April 30, 2026, respectively Accounts Receivable, after Allowance for Credit Loss, Current Net unrealized gain (loss) on marketable securities, net of tax Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Retained earnings Retained Earnings (Accumulated Deficit) Net earnings per common share: Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Product and Service Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Fair Value Cash and Cash Equivalents Available-for-sale debt securities Debt Securities, Available-for-Sale Reimbursed out-of-pocket engagement expenses Reimbursed Out Of Pocket Engagement Expenses [Member] Reimbursed out-of-pocket engagement expenses. Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Organization and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Cover [Abstract] Deferred compensation arrangement vesting period Deferred Compensation Arrangement with Individual, Requisite Service Period Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Organization And Summary Of Significant Accounting Policies [Line Items] Organization And Summary Of Significant Accounting Policies [Line Items] Organization And Summary Of Significant Accounting Policies [Line Items] Total liabilities and stockholders' equity Liabilities and Equity Variable lease cost Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Noncontrolling interest Equity, Attributable to Noncontrolling Interest Segments Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Schedule of Financial Instruments and Balance Sheet Classification Unrealized Gain (Loss) on Investments [Table Text Block] Schedule of Components of Stock-Based Compensation Expense Recognized Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Long-Term Debt Long-Term Debt [Text Block] Repayments of senior debt Repayments of Senior Debt Total Korn Ferry Stockholders' Equity Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Deferred compensation Increase (Decrease) in Deferred Compensation Stockholders' equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Forfeited/expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative expenses General and Administrative Expense Less: reallocation of undistributed earnings to nonvested restricted stockholders Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Schedule of Components of Net Periodic Benefits Costs Schedule of Defined Benefit Plans Disclosures [Table Text Block] Cash paid for amounts included in the measurement of lease liabilities: Cash Paid For Amounts Included In Measurement Of Lease Liabilities [Abstract] Cash paid for amounts included in measurement of lease liabilities. Adjustment to Compensation: Adjustment to Compensation [Axis] Reclassification of realized net losses (gains) to net income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Quarterly principal starting on December 31, 2028 Quarterly Principal Starting On December 31, 2028 [Member] Quarterly Principal Starting On December 31, 2028 Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign currency forward contracts Foreign Exchange Forward [Member] Add: undistributed earnings to nonvested restricted stockholders Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Credit Facility Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Assets, fair value Assets, Fair Value Disclosure Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Consideration transferred Business Combination, Consideration Transferred Retirement Plan Type Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Impairment of goodwill Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalents Cash and Cash Equivalent Financing Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Company Selected Measure Amount Company Selected Measure Amount Unrealized (loss) gain related to equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Depreciation and amortization Total depreciation and amortization Depreciation, Depletion and Amortization Fair Value And Unrealized Losses On Available For Sale Debt Securities [Table] Fair Value And Unrealized Losses On Available For Sale Debt Securities [Table] Fair value and unrealized losses on available for sale debt securities. SOFR Secured Overnight Financing Rate (SOFR) [Member] Quarterly principal starting December 31, 2026 Quarterly Principal Starting On December 31, 2026 [Member] Quarterly Principal Starting On December 31, 2026 Deferred Compensation Plan Deferred Compensation Plan [Member] Deferred Compensation Plan [Member] Entity Address, Address Line Two Entity Address, Address Line Two Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Gain on cash surrender value of life insurance policies Increase in market value of the underlying COLI investments Life Insurance, Corporate or Bank Owned, Change in Value Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Impairment of intangible assets Intangible Asset, Finite-Lived, Impairment Loss Weighted-average, vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax provision Income Tax Expense (Benefit) Cost of services Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Basis of Consolidation and Presentation Consolidation, Policy [Policy Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Unearned compensation, non-current Unearned Compensation Non Current The amount advanced to employees that we consider unearned compensation that will vest and therefore be expensed in more than one year. Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Executive Capital Accumulation Plan Executive Capital Accumulation Plan [Member] Executive Capital Accumulation Plan [Member] Amortization of actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Net income attributable to Korn Ferry Net income attributable to Korn Ferry Net Income (Loss) Attributable to Parent Long-Term Debt, Type Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Outstanding policy loans Policy Loans Payable Policy Loans Payable Balance Sheet Location Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Less significant segment expenses Significant Segment Expenses [Abstract] Significant Segment Expenses Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Components of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Contract Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Foreign currency forward contracts, fair value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Employees stock purchased, price per share (in usd per share) Employee Stock Purchase Plan Purchase Price Of Shares Purchased Purchase price paid by employees for common stock through an employee stock purchase plan. Reimbursed expenses Reimbursed Expenses [Member] Reimbursed expenses. Recoveries of amounts previously written off Accounts Receivable, Allowance for Credit Loss, Recovery Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]