CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Common Stock Common Class A	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock At Cost	Total Stockholders' Equity of Scholastic Corporation	Noncontrolling Interest
Beginning balance at May. 31, 2021	$ 1,182.3	$ 0.4	$ 0.0	$ 626.5	$ (34.7)	$ 916.4	$ (327.8)	$ 1,180.8	$ 1.5
Balance (in shares) at Aug. 31, 2021		32.8	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(24.4)					(24.2)		(24.2)	(0.2)
Foreign currency translation adjustment	(5.8)				(5.8)			(5.8)
Pension and post-retirement adjustments (net of tax of $0.0)	0.1				0.1			0.1
Stock-based compensation	1.5			1.5				1.5
Proceeds pursuant to stock-based compensation plans	0.5			0.5				0.5
Treasury stock issued pursuant to equity-based plans (in shares)		0.1
Treasury stock issued pursuant to equity-based plans	0.6			(0.9)			1.5	0.6
Dividends	(5.2)					(5.2)		(5.2)
Ending Balance at Aug. 31, 2021	1,149.6	$ 0.4	$ 0.0	627.6	(40.4)	887.0	(326.3)	1,148.3	1.3
Balance (in shares) at May. 31, 2021		32.7	1.7
Beginning balance at May. 31, 2022	1,218.4	$ 0.4	$ 0.0	627.0	(45.4)	976.5	(341.5)	1,217.0	1.4
Balance (in shares) at Aug. 31, 2022		32.7	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(45.4)					(45.5)		(45.5)	0.1
Foreign currency translation adjustment	(9.6)				(9.6)			(9.6)
Pension and post-retirement adjustments (net of tax of $0.0)	0.0				0.0			0.0
Stock-based compensation	1.7			1.7				1.7
Proceeds pursuant to stock-based compensation plans	11.6			11.6				11.6
Purchases of treasury stock at cost (in shares)		(0.1)
Purchases of treasury stock at cost	(5.1)						(5.1)	(5.1)
Treasury stock issued pursuant to equity-based plans (in shares)		0.3
Treasury stock issued pursuant to equity-based plans	1.6			(10.8)			12.4	1.6
Dividends	(6.9)					(6.9)		(6.9)
Ending Balance at Aug. 31, 2022	$ 1,166.3	$ 0.4	$ 0.0	$ 629.5	$ (55.0)	$ 924.1	$ (334.2)	$ 1,164.8	$ 1.5
Balance (in shares) at May. 31, 2022		32.5	1.7