Document and Entity Information - shares	3 Months Ended
	Jul. 31, 2020	Sep. 02, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2020
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Trading Symbol	KFY
Entity Registrant Name	KORN FERRY
Entity Central Index Key	0000056679
Current Fiscal Year End Date	--04-30
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		54,781,137
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Security Exchange Name	NYSE
Entity File Number	001-14505
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-2623879
Entity Address, Address Line One	1900 Avenue of the Stars
Entity Address, Address Line Two	Suite 2600
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90067
City Area Code	310
Local Phone Number	552-1834
Document Quarterly Report	true
Document Transition Report	false