Segments - Financial Highlights (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 712,447	$ 735,719	$ 1,418,709	$ 1,438,867
Net (loss) income attributable to Korn Ferry	(1,711)	73,541	44,894	150,788
Net income attributable to noncontrolling interest	1,755	1,074	2,335	2,363
Other loss, net	13,835	9,048	258	8,273
Interest expense, net	6,596	7,098	11,336	14,710
Income tax provision	2,341	28,886	20,761	55,112
Operating income	22,816	119,647	79,584	231,246
Depreciation and amortization	19,554	17,093	38,566	33,322
Other loss, net	(13,835)	(9,048)	(258)	(8,273)
Integration/acquisition costs	5,030	3,411	9,158	7,016
Impairment of fixed assets	1,452	0	1,575	0
Impairment of right-of-use assets	0	0	1,629	0
Restructuring charges, net	63,525	0	63,946	0
Adjusted EBITDA	98,542	131,103	194,200	263,311
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	$ 704,003	$ 727,849	$ 1,403,192	$ 1,423,752