Restructuring and Related Charges - Pretax Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 19,203	$ 25,561	$ 63,041
Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	19,306	29,347	61,554
Total Charges Incurred to Date	159,089
Global Restructuring Program \| Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	9,179	20,596	28,556
Total Charges Incurred to Date	84,158
Global Restructuring Program \| Impairment of operating lease ROU assets and technology, property, and equipment
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	0	656	10,043
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	0	1,786	4,148
Total Charges Incurred to Date	8,074
Global Restructuring Program \| Facility related charges, net
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	4,368	4,249	4,254
Total Charges Incurred to Date	17,021
Global Restructuring Program \| Consulting costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	5,022	657	8,967
Total Charges Incurred to Date	16,931
Global Restructuring Program \| Other activities
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	737	1,403	5,586
Total Charges Incurred to Date	9,510
Operating Segments \| Research \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,519	10,047	7,410
Total Charges Incurred to Date	21,389
Operating Segments \| Learning \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	2,940	1,515	11,448
Total Charges Incurred to Date	23,707
Operating Segments \| Held for Sale or Sold \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	0	(117)	7,326
Total Charges Incurred to Date	12,995
Corporate Expenses \| Global Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	14,847	$ 17,902	$ 35,370
Total Charges Incurred to Date	$ 100,998