Revenue Recognition, Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	$ 1,676,528	$ 1,677,609	$ 1,872,987
Operating Segments \| Research
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	1,129,942	1,075,459	1,042,705
Operating Segments \| Research \| Research Publishing
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	965,767	922,553	892,784
Operating Segments \| Research \| Research Solutions
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	164,175	152,906	149,921
Operating Segments \| Learning
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	546,586	584,768	574,739
Operating Segments \| Learning \| Academic
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	318,757	333,693	323,541
Operating Segments \| Learning \| Professional
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	227,829	251,075	251,198
Operating Segments \| Held for Sale or Sold
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	$ 0	$ 17,382	$ 255,543