Segment Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jul. 31, 2022 USD ($)	Jul. 31, 2021 USD ($)	Apr. 30, 2023 USD ($) Segment	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of customer-centric segments | Segment			2
Number of reportable segments | Segment			3
Segment Information [Abstract]
Revenue, net			$ 2,019,900	$ 2,082,928	$ 1,941,501
Total adjusted operating income			213,344	217,849	218,821
Depreciation and amortization			213,253	215,170	200,189
Accelerated amortization of intangible assets	$ 4,600	$ 4,600
Operating Segments
Segment Information [Abstract]
Revenue, net			2,019,900	2,082,928	1,941,501
Adjusted corporate contribution to profit			385,270	410,433	385,874
Depreciation and amortization			196,791	198,617	185,517
Operating Segments | Research
Segment Information [Abstract]
Revenue, net			1,080,311	1,111,343	1,015,349
Adjusted corporate contribution to profit			283,984	295,227	273,023
Depreciation and amortization			93,008	94,899	83,866
Operating Segments | Academic
Segment Information [Abstract]
Revenue, net			690,408	759,112	769,014
Adjusted corporate contribution to profit			68,279	91,247	117,005
Depreciation and amortization			79,741	81,721	77,823
Operating Segments | Talent
Segment Information [Abstract]
Revenue, net			249,181	212,473	157,138
Adjusted corporate contribution to profit			33,007	23,959	(4,154)
Depreciation and amortization			24,042	21,997	23,828
Corporate Expenses
Segment Information [Abstract]
Adjusted corporate contribution to profit			(171,926)	(192,584)	(167,053)
Depreciation and amortization			$ 16,462	$ 16,553	$ 14,672