Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Income Statement [Abstract]
Revenues	$ 1,487.1	$ 1,653.9	$ 1,628.4
Operating costs and expenses:
Cost of goods sold	751.0	779.9	744.6
Selling, general and administrative expenses	705.3	781.4	765.7
Depreciation and amortization	61.5	56.1	41.4
Severance	17.2	10.6	9.9
Non cash write off related to asset impairments and write downs	40.6	0.9	11.2
Total operating costs and expenses	1,575.6	1,628.9	1,572.8
Operating income (loss)	(88.5)	25.0	55.6
Interest income	3.1	5.6	3.1
Interest expense	(3.0)	(2.2)	(2.0)
Other components of net periodic benefit (cost)	(1.3)	(1.4)	(58.2)
Gain (loss) on investments and other	0.0	1.0	(0.0)
Earnings (loss) before income taxes	(89.7)	26.0	(1.5)
Provision (benefit) for income taxes	(46.0)	10.4	3.5
Net income (loss)	(43.7)	15.6	(5.0)
Less: Net income (loss) attributable to noncontrolling interest	0.1	0.0	0.0
Net income (loss) attributable to Scholastic Corporation	$ (43.8)	$ 15.6	$ (5.0)
Basic:
Basic earnings (loss) per share (in Dollars per share)	$ (1.27)	$ 0.44	$ (0.14)
Diluted:
Net income (loss) (in Dollars per share)	(1.27)	0.43	(0.14)
Dividends declared per common share (in Dollars per share)	$ 0.60	$ 0.60	$ 0.60