Restructuring and Related Charges - Pretax Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 25,561	$ 63,041	$ 49,389
Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	29,347	61,554	48,882
Total Charges Incurred to Date	139,783
Global Restructuring Program \| Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	20,596	28,556	25,827
Total Charges Incurred to Date	74,979
Global Restructuring Program \| Impairment of operating lease ROU assets and technology, property and equipment
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	656	10,043	12,696
Total Charges Incurred to Date	23,395
Global Restructuring Program \| Acceleration of expense related to operating lease ROU assets, technology, property and equipment, and intangible assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,786	4,148	2,140
Total Charges Incurred to Date	8,074
Global Restructuring Program \| Facility related charges, net
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	4,249	4,254	4,150
Total Charges Incurred to Date	12,653
Global Restructuring Program \| Consulting costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	657	8,967	2,285
Total Charges Incurred to Date	11,909
Global Restructuring Program \| Other activities
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,403	5,586	1,784
Total Charges Incurred to Date	8,773
Operating Segments \| Research \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	10,047	7,410	2,413
Total Charges Incurred to Date	19,870
Operating Segments \| Learning \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,515	11,448	7,804
Total Charges Incurred to Date	20,767
Operating Segments \| Held for Sale or Sold \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	(117)	7,326	5,786
Total Charges Incurred to Date	12,995
Corporate expenses \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	17,902	$ 35,370	$ 32,879
Total Charges Incurred to Date	$ 86,151