Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
Aug. 31, 2025	Aug. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Less: Tax effect	$ 25.9	$ 29.3
Net income (loss) attributable to Scholastic Corporation	71.1	62.5
Amount reclassified from Accumulated other comprehensive income (loss) \| Retirement benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized gain (loss)	0.4	0.3
Amortization of prior service (credit) loss	(0.2)	(0.2)
Less: Tax effect	0.1	0.1
Net income (loss) attributable to Scholastic Corporation	$ 0.3	$ 0.2

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details