CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($)	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, 2020	$ 1,180,600,000	$ 400,000	$ 0.0	$ 622,400,000	$ (58,300,000)	$ 948,000,000.0	$ (333,300,000)	$ 1,179,200,000	$ 1,400,000
Balance (in shares) at Aug. 31, 2020		32,500,000	1,700,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	(39,800,000)					(39,800,000)		(39,800,000)
Foreign currency translation adjustment	10,700,000				10,700,000			10,700,000
Pension and post-retirement adjustments (net of tax of $0.0)	100,000				100,000			100,000
Stock-based compensation	600,000			600,000				600,000
Treasury stock issued pursuant to equity-based plans (in shares)		0.0
Treasury stock issued pursuant to equity-based plans	300,000			(200,000)			500,000	300,000
Dividends ($0.15 per share)	(5,100,000)					(5,100,000)		(5,100,000)
Ending Balance at Aug. 31, 2020	1,147,400,000	$ 400,000	$ 0.0	622,800,000	(47,500,000)	903,100,000	(332,800,000)	1,146,000,000	1,400,000
Balance (in shares) at May. 31, 2020		32,500,000	1,700,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(39,800,000)								0.0
Beginning balance at May. 31, 2021	1,182,300,000	$ 400,000	$ 0.0	626,500,000	(34,700,000)	916,400,000	(327,800,000)	1,180,800,000	1,500,000
Balance (in shares) at Aug. 31, 2021		32,800,000	1,700,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	(24,400,000)					(24,200,000)		(24,200,000)
Foreign currency translation adjustment	(5,800,000)				(5,800,000)			(5,800,000)
Pension and post-retirement adjustments (net of tax of $0.0)	100,000				100,000			100,000
Stock-based compensation	1,500,000			1,500,000				1,500,000
Proceeds pursuant to stock-based compensation plans	$ 500,000			500,000				500,000
Purchases of treasury stock at cost (in shares)	0
Treasury stock issued pursuant to equity-based plans (in shares)		100,000
Treasury stock issued pursuant to equity-based plans	$ 600,000			(900,000)			1,500,000	600,000
Dividends ($0.15 per share)	(5,200,000)					(5,200,000)		(5,200,000)
Ending Balance at Aug. 31, 2021	1,149,600,000	$ 400,000	$ 0.0	$ 627,600,000	$ (40,400,000)	$ 887,000,000.0	$ (326,300,000)	$ 1,148,300,000	1,300,000
Balance (in shares) at May. 31, 2021		32,700,000	1,700,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (24,400,000)								$ (200,000)