Segments - Financial Highlights (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 2,863,836	$ 2,643,455	$ 1,819,946
Net income attributable to Korn Ferry	209,529	326,360	114,454
Net income attributable to noncontrolling interest	3,525	4,485	1,108
Other (income) loss, net	(5,261)	11,880	(37,194)
Interest expense, net	25,864	25,293	29,278
Income tax provision	82,683	102,056	48,138
Operating income	316,340	470,074	155,784
Depreciation and amortization	68,335	63,521	61,845
Other income (loss), net	5,261	(11,880)	37,194
Business Combination Acquisition And Integration Related Costs	14,922	7,906	737
Impairment of fixed assets	4,375	1,915	0
Impairment of right-of-use assets	5,471	7,392	0
Restructuring charges, net	42,573	0	30,732
Adjusted EBITDA	457,277	538,928	286,292
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	$ 2,835,408	$ 2,626,718	$ 1,810,047