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Restructuring and Related Charges (Credits), Pretax Restructuring Charges (Credits) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2022	Jul. 31, 2021
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges	[1]	$ 22,441	$ (276)
Initial pretax restructuring charge		20,000
Fiscal Year 2023 Restructuring Program [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		$ 21,741
Percentage reduction in real estate square footage occupancy		17.00%
Initial pretax restructuring charge		$ 20,000
Fair value of operating lease ROU assets and property and equipment immediately subsequent to impairment		2,400
Fiscal Year 2023 Restructuring Program [Member] | Severance and Termination Benefits [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		12,097
Fiscal Year 2023 Restructuring Program [Member] | Impairment of Operating Lease ROU Assets and Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		6,106
Fiscal Year 2023 Restructuring Program [Member] | Impairment of Operating Lease ROU Assets Related to Certain Leases [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		2,900
Fiscal Year 2023 Restructuring Program [Member] | Impairment of Operating Lease ROU Assets Related to Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		3,200
Fiscal Year 2023 Restructuring Program [Member] | Acceleration of Expense Related to Operating Lease ROU Assets and Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		1,840
Fiscal Year 2023 Restructuring Program [Member] | Acceleration of Expense of Operating Lease ROU Assets Related to Certain Leases [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		900
Fiscal Year 2023 Restructuring Program [Member] | Acceleration of Expense of Operating Lease ROU Assets Related to Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		900
Fiscal Year 2023 Restructuring Program [Member] | Facility Related Charges, Net [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		1,698
Fiscal Year 2023 Restructuring Program [Member] | Research [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		81
Fiscal Year 2023 Restructuring Program [Member] | Academic & Professional Learning [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		5,914
Fiscal Year 2023 Restructuring Program [Member] | Education Services [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		830
Fiscal Year 2023 Restructuring Program [Member] | Corporate Expenses [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		14,916
Business Optimization Program [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		700	(276)
Restructuring and related charges incurred to date		65,535
Business Optimization Program [Member] | Severance and Termination Benefits [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		(114)	(614)
Restructuring and related charges incurred to date		35,005
Business Optimization Program [Member] | Impairment of Operating Lease ROU Assets and Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		0	0
Restructuring and related charges incurred to date		15,079
Business Optimization Program [Member] | Acceleration of Expense Related to Operating Lease ROU Assets and Property and Equipment [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		0	0
Restructuring and related charges incurred to date		3,378
Business Optimization Program [Member] | Facility Related Charges, Net [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		814	338
Restructuring and related charges incurred to date		10,333
Business Optimization Program [Member] | Other Activities [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		0	0
Restructuring and related charges incurred to date		1,740
Business Optimization Program [Member] | Research [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		0	216
Restructuring and related charges incurred to date		3,882
Business Optimization Program [Member] | Academic & Professional Learning [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		(124)	171
Restructuring and related charges incurred to date		13,126
Business Optimization Program [Member] | Education Services [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		3	(34)
Restructuring and related charges incurred to date		4,316
Business Optimization Program [Member] | Corporate Expenses [Member]
Summary of pretax restructuring charges [Abstract]
Restructuring and related charges		821	$ (629)
Restructuring and related charges incurred to date		$ 44,211
[1] See Note 9, “Restructuring and Related Charges (Credits)” for these charges by segment.

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