Goodwill and Other Intangibles - Narrative (Details) - USD ($)	3 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2024	May 31, 2024	Feb. 28, 2025	Feb. 28, 2025	Feb. 29, 2024	May 31, 2024	May 31, 2023
Goodwill [Line Items]
Additions					$ 0	$ 0
Goodwill, Impairment Loss				$ 0	0	0
Amortizable intangible assets acquired	$ 6,000,000.0			$ 85,300,000	6,000,000.0
Useful life			8 years 7 months 6 days	8 years 7 months 6 days
Impairments	$ 3,100,000	$ 3,100,000		$ 0	0
Impairment of intangible assets (excluding goodwill)				0	$ 0
Amortizable Intangible Assets - Educational Programs
Goodwill [Line Items]
Amortizable intangible assets acquired						$ 5,800,000
Useful life		8 years				8 years
Amortizable Intangible Assets - Children's Book Publishing Business
Goodwill [Line Items]
Amortizable intangible assets acquired						$ 200,000
Useful life		5 years				5 years
9 Story Media Group Inc.
Goodwill [Line Items]
Additions				$ 70,100,000
Amortizable intangible assets acquired			$ 85,300,000
Learning Ovations, Inc.
Goodwill [Line Items]
Amortizable intangible assets acquired							$ 4,100,000