Acquisitions (Details) - USD ($) $ in Millions			3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 01, 2023	Sep. 01, 2022	Nov. 30, 2023	Nov. 30, 2023	Nov. 30, 2022	May 31, 2023
Business Acquisition [Line Items]
Other investment and acquisition-related payments				$ (8.3)	$ (10.7)
Additional paid-in capital			$ 630.8	630.8	629.0	$ 632.2
Amortizable intangible assets acquired			$ 5.8	5.8	4.1	4.1
Additions				$ 0.0	$ 7.0	$ 7.6
Education
Business Acquisition [Line Items]
Additions		$ 7.6
Learning Ovations, Inc.
Business Acquisition [Line Items]
Other investment and acquisition-related payments		11.1
Amortizable intangible assets acquired		4.1
Receivables, Fair Value Disclosure		$ 0.1
Business combination, discount rate		0.175
Fair Value, Net Asset (Liability)		$ 3.6
Deferred Tax Liabilities, Tax Deferred Income		0.6
Learning Ovations, Inc. | Education
Business Acquisition [Line Items]
Additions		$ 7.6
Make Believe Ideas Limited (MBI)
Business Acquisition [Line Items]
Other investment and acquisition-related payments	$ 2.1
Noncontrolling interest, equity, carrying amount	1.6
Additional paid-in capital	$ 0.5
Scholastic, Inc. | Learning Ovations, Inc.
Business Acquisition [Line Items]
Ownership percentage		100.00%
Scholastic, Inc. | Make Believe Ideas Limited (MBI)
Business Acquisition [Line Items]
Ownership percentage	100.00%					95.00%