Segments - Financial Highlights by Operating Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 2,795,505	$ 2,863,836	$ 2,643,455
Adjusted EBITDA	408,204	457,277	538,928
Fee revenue
Segment Reporting Information [Line Items]
Total revenue	2,762,671	2,835,408	2,626,718
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Total revenue	706,805	686,979	654,199
Adjusted EBITDA	114,260	108,502	116,108
Operating Segments | Digital
Segment Reporting Information [Line Items]
Total revenue	366,924	354,967	349,437
Adjusted EBITDA	108,669	97,458	110,050
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenue	513,545	568,212	609,258
Adjusted EBITDA	120,710	140,850	181,615
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	185,552	188,114	182,866
Adjusted EBITDA	25,902	31,380	31,804
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	86,273	95,956	118,705
Adjusted EBITDA	18,923	24,222	35,105
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenue	28,956	31,054	29,079
Adjusted EBITDA	5,571	9,370	9,089
Operating Segments | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	544,453	507,058	297,974
Adjusted EBITDA	101,868	110,879	106,015
Operating Segments | RPO
Segment Reporting Information [Line Items]
Total revenue	362,997	431,496	401,937
Adjusted EBITDA	40,399	52,588	59,126
Operating Segments | Fee revenue | Consulting
Segment Reporting Information [Line Items]
Total revenue	695,007	677,001	650,204
Operating Segments | Fee revenue | Digital
Segment Reporting Information [Line Items]
Total revenue	366,699	354,651	349,025
Operating Segments | Fee revenue | North America
Segment Reporting Information [Line Items]
Total revenue	506,927	562,139	605,704
Operating Segments | Fee revenue | EMEA
Segment Reporting Information [Line Items]
Total revenue	184,516	187,014	182,192
Operating Segments | Fee revenue | Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	85,863	95,598	118,596
Operating Segments | Fee revenue | Latin America
Segment Reporting Information [Line Items]
Total revenue	28,937	31,047	29,069
Operating Segments | Fee revenue | Professional Search & Interim
Segment Reporting Information [Line Items]
Total revenue	540,615	503,395	297,096
Operating Segments | Fee revenue | RPO
Segment Reporting Information [Line Items]
Total revenue	354,107	424,563	394,832
Corporate
Segment Reporting Information [Line Items]
Total revenue	0	0	0
Adjusted EBITDA	$ (128,098)	$ (117,972)	$ (109,984)