Asset Write Down [Line Items]

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- Definition

Impact to Earnings Per Share, Income (Loss), Basic

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- Definition

Impact to Earnings Per Share, Income (Loss), Diluted

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- Definition

Carrying amount as of the balance sheet date of capitalized value of the art, prepress, editorial and other costs incurred in the creation of the master copy of a book or other media (the “prepublication costs”). Prepublication costs are amortized on a straight-line basis over a three- to seven-year period based on expected future revenues.

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- Definition

Property Plant and Equipment, Capitalized Costs

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of loss from impairment of right-of-use asset from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Asset Write Down (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	May 31, 2026	May 31, 2025	May 31, 2024	May 19, 2026
Asset Write Down [Line Items]
Asset impairments and write downs	$ 10.9	$ 2.9	$ 10.0
Operating lease, impairment loss			$ 3.9
Operating lease right-of-use assets, net	$ 291.2	$ 103.9
Impact to EPS, basic (in dollars per share)	$ 0.35	$ 0.08	$ 0.25
Impact to EPS, diluted (in dollars per share)	$ 0.34	$ 0.08	$ 0.25
Prepublication costs, net	$ 41.1	$ 49.7
UK Children's Book Publishing
Asset Write Down [Line Items]
Ownership percentage	12.00%
Equity method investments	$ 0.3			$ 33.9
Overhead
Asset Write Down [Line Items]
Asset impairments and write downs		2.9
Operating lease, impairment loss		0.1
Education
Asset Write Down [Line Items]
Asset impairments and write downs	4.3		$ 6.1
Overhead
Asset Write Down [Line Items]
Operating lease right-of-use assets, net			2.3
International
Asset Write Down [Line Items]
Asset impairments and write downs		1.1
Operating lease right-of-use assets, net			1.1
Equity method investments	$ 0.0	33.6
International \| U.K. Book Publishing Business
Asset Write Down [Line Items]
Ownership percentage	12.00%			26.20%
Children's Book Publishing and Distribution
Asset Write Down [Line Items]
Asset impairments and write downs	$ 0.6	0.6
Operating lease right-of-use assets, net			$ 0.5
Prepublication costs, net		0.6
Children's Book Publishing and Distribution \| Cloud Computing Arrangement
Asset Write Down [Line Items]
Property plant and equipment, capitalized costs	0.8
Entertainment
Asset Write Down [Line Items]
Asset impairments and write downs	$ 4.9
Operating lease, impairment loss		$ 0.5