CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($) shares in Millions, $ in Millions	Total	Common Class	Common Class 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, 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 adjustments	(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
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 Nov. 30, 2022		32.4	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	30.0
Foreign currency translation adjustments	(6.6)
Ending Balance at Nov. 30, 2022	1,218.1	$ 0.4	$ 0.0	629.0	(52.1)	992.4	(353.2)	1,216.5	1.6
Balance (in shares) at May. 31, 2022		32.5	1.7
Beginning 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 Nov. 30, 2022		32.4	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	75.4					75.3		75.3	0.1
Foreign currency translation adjustments	3.0				3.0			3.0
Pension and post-retirement adjustments (net of tax of $0.0)	0.1				0.1			0.1
Stock-based compensation	4.2			4.2				4.2
Proceeds pursuant to stock-based compensation plans	1.5			1.5				1.5
Purchases of treasury stock at cost (in shares)		(0.6)
Purchases of treasury stock at cost	(26.0)						(26.0)	(26.0)
Treasury stock issued pursuant to equity-based plans (in shares)		0.3
Treasury stock issued pursuant to equity-based plans	0.8			(6.2)			7.0	0.8
Dividends	(7.0)					(7.0)		(7.0)
Ending Balance at Nov. 30, 2022	1,218.1	$ 0.4	$ 0.0	629.0	(52.1)	992.4	(353.2)	1,216.5	1.6
Balance (in shares) at Aug. 31, 2022		32.7	1.7
Beginning balance at May. 31, 2023	1,164.5	$ 0.4	$ 0.0	632.2	(55.8)	1,035.6	(449.5)	1,162.9	1.6
Balance (in shares) at Aug. 31, 2023		29.3	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(74.2)					(74.2)		(74.2)
Foreign currency translation adjustments	1.8				1.8			1.8
Pension and post-retirement adjustments (net of tax of $0.0)	0.2				0.2			0.2
Stock-based compensation	2.3			2.3				2.3
Proceeds pursuant to stock-based compensation plans	3.0			3.0				3.0
Purchases of treasury stock at cost (in shares)		(0.8)
Purchases of treasury stock at cost	(36.2)						(36.2)	(36.2)
Treasury stock issued pursuant to equity-based plans (in shares)		0.1
Treasury stock issued pursuant to equity-based plans	1.6			(4.3)			5.9	1.6
Dividends	(6.3)					(6.3)		(6.3)
Other (noncontrolling interest)	(2.1)			(0.5)				(0.5)	(1.6)
Ending Balance at Aug. 31, 2023	1,054.6	$ 0.4	$ 0.0	632.7	(53.8)	955.1	(479.8)	1,054.6	0.0
Balance (in shares) at May. 31, 2023		30.0	1.7
Beginning balance at May. 31, 2023	1,164.5	$ 0.4	$ 0.0	632.2	(55.8)	1,035.6	(449.5)	1,162.9	1.6
Balance (in shares) at Nov. 30, 2023		28.2	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2.7
Foreign currency translation adjustments	2.0
Purchases of treasury stock at cost	(88.5)
Ending Balance at Nov. 30, 2023	1,079.1	$ 0.4	$ 0.0	630.8	(53.5)	1,026.0	(524.6)	1,079.1	0.0
Balance (in shares) at May. 31, 2023		30.0	1.7
Beginning balance at Aug. 31, 2023	1,054.6	$ 0.4	$ 0.0	632.7	(53.8)	955.1	(479.8)	1,054.6	0.0
Balance (in shares) at Nov. 30, 2023		28.2	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	76.9					76.9		76.9
Foreign currency translation adjustments	0.2				0.2			0.2
Pension and post-retirement adjustments (net of tax of $0.0)	(0.1)				(0.1)			(0.1)
Stock-based compensation	4.1			4.1				4.1
Proceeds pursuant to stock-based compensation plans	0.6			0.6				0.6
Purchases of treasury stock at cost (in shares)		(1.4)
Purchases of treasury stock at cost	(52.3)						(52.3)	(52.3)
Treasury stock issued pursuant to equity-based plans (in shares)		0.3
Treasury stock issued pursuant to equity-based plans	0.9			(6.6)			7.5	0.9
Dividends	(6.0)					(6.0)		(6.0)
Ending Balance at Nov. 30, 2023	$ 1,079.1	$ 0.4	$ 0.0	$ 630.8	$ (53.5)	$ 1,026.0	$ (524.6)	$ 1,079.1	$ 0.0
Balance (in shares) at Aug. 31, 2023		29.3	1.7