CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Income Statement [Abstract]
Revenues	$ 232.6	$ 218.4
Operating costs and expenses:
Cost of goods sold	137.1	125.3
Selling, general and administrative expenses	167.5	163.7
Depreciation and amortization	15.4	13.2
Total operating costs and expenses	320.0	302.2
Operating income (loss)	(87.4)	(83.8)
Interest income (expense), net	0.7	0.8
Other components of net periodic benefit (cost)	(0.4)	(0.4)
Earnings (loss) before income taxes	(87.1)	(83.4)
Provision (benefit) for income taxes	(28.6)	(22.1)
Net income (loss)	(58.5)	(61.3)
Less: Net income (loss) attributable to noncontrolling interests	0.0	0.0
Net income (loss) attributable to Scholastic Corporation	$ (58.5)	$ (61.3)
Basic and diluted earnings (loss) per Share of Class A and Common Stock
Basic (in Dollars per share)	$ (1.68)	$ (1.75)
Diluted (in Dollars per share)	$ (1.68)	$ (1.75)