CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Income Statement [Abstract]
Revenues	$ 406.2	$ 597.2	$ 621.4	$ 829.8
Operating costs and expenses:
Cost of goods sold	199.3	264.3	322.5	401.4
Selling, general and administrative expenses	137.0	210.6	258.5	373.7
Depreciation and amortization	15.8	15.4	31.3	30.8
Severance	5.3	1.8	17.3	6.2
Total operating costs and expenses	357.4	492.1	629.6	812.1
Operating income (loss)	48.8	105.1	(8.2)	17.7
Interest income (expense), net	(1.2)	0.0	(2.4)	0.7
Other components of net periodic benefit (cost)	(0.0)	(0.2)	(0.2)	(0.6)
Gain (loss) on sale of assets and other	(0.0)	0.0	6.6	0.0
Earnings (loss) before income taxes	47.6	104.9	(4.2)	17.8
Provision (benefit) for income taxes	12.4	33.8	0.4	5.2
Net income (loss)	35.2	71.1	(4.6)	12.6
Less: Net income (loss) attributable to noncontrolling interest	0.1	0.1	0.1	0.1
Net income (loss) attributable to Scholastic Corporation	$ 35.1	$ 71.0	$ (4.7)	$ 12.5
Basic and diluted earnings (loss) per Share of Class A and Common Stock
Basic (in Dollars per share)	$ 1.02	$ 2.04	$ (0.14)	$ 0.36
Diluted (in Dollars per share)	$ 1.02	$ 2.02	$ (0.14)	$ 0.35