Segments - Schedule of Financial Highlights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Segment Reporting Information [Line Items]
Total revenue	$ 676,538	$ 676,873	$ 2,041,259	$ 2,095,582
Net income attributable to Korn Ferry	58,414	59,071	181,818	103,965
Net income attributable to noncontrolling interest	925	649	4,120	2,984
Interest expense, net	5,461	4,946	15,032	16,282
Income tax provision	22,795	9,018	70,047	29,779
Depreciation and amortization	20,490	19,509	59,756	58,075
Impairment of fixed assets			509	1,575
Impairment of right-of-use assets	2,452	0	2,452	1,629
Restructuring charges, net	1,316	4,612	1,892	68,558
Adjusted EBITDA	114,489	101,704	342,725	295,904
Reportable Segment
Segment Reporting Information [Line Items]
Total revenue	676,538	676,873	2,041,259	2,095,582
Net income attributable to Korn Ferry	58,414	59,071	181,818	103,965
Net income attributable to noncontrolling interest	925	649	4,120	2,984
Interest expense, net	5,461	4,946	15,032	16,282
Income tax provision	22,795	9,018	70,047	29,779
Depreciation and amortization	20,490	19,509	59,756	58,075
Integration/acquisition costs	2,127	3,899	7,099	13,057
Impairment of fixed assets	509	0	509	1,575
Impairment of right-of-use assets	2,452	0	2,452	1,629
Restructuring charges, net	1,316	4,612	1,892	68,558
Adjusted EBITDA	114,489	101,704	342,725	295,904
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	668,729	668,679	2,018,040	2,071,871
Fee revenue | Reportable Segment
Segment Reporting Information [Line Items]
Total revenue	$ 668,729	$ 668,679	$ 2,018,040	$ 2,071,871