Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 12.1	$ 86.5	$ 81.0
Other comprehensive income (loss), net:
Foreign currency translation adjustments	3.1	(5.4)	(14.5)
Pension and postretirement adjustments, net of tax	0.2	(5.0)	3.8
Total other comprehensive income (loss)	3.3	(10.4)	(10.7)
Comprehensive income (loss)	15.4	76.1	70.3
Less: Net income (loss) attributable to noncontrolling interest	0.0	0.2	0.1
Comprehensive income (loss) attributable to Scholastic Corporation	$ 15.4	$ 75.9	$ 70.2