Revenue Recognition, Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	$ 1,677,609	$ 1,872,987	$ 2,019,900
Operating Segments
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	1,677,609	1,872,987	2,019,900
Operating Segments \| Research
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	1,075,459	1,042,705	1,080,311
Operating Segments \| Research \| Research Publishing
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	922,553	892,784	926,773
Operating Segments \| Research \| Research Solutions
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	152,906	149,921	153,538
Operating Segments \| Learning
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	584,768	574,739	546,395
Operating Segments \| Learning \| Academic
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	333,693	323,541	304,633
Operating Segments \| Learning \| Professional
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	251,075	251,198	241,762
Operating Segments \| Held for Sale or Sold
Revenue from contracts with customers disaggregated by segment and product type [Abstract]
Total Revenue	$ 17,382	$ 255,543	$ 393,194