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 [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance at May. 31, 2018	$ 1,320.8	$ 0.4	$ 0.0	$ 614.4	$ (55.7)	$ 1,065.2	$ (303.5)	$ 1,320.8	$ 0.0
Balance at Aug. 31, 2018	1,209.4	$ 0.4	0.0	615.5	(58.6)	952.1	(300.0)	1,209.4	0.0
Net Income (loss)	(61.3)					(61.3)		(61.3)
Foreign currency translation adjustment	(3.1)				(3.1)			(3.1)
Pension and post-retirement adjustments (net of tax of $0.0)	0.2				0.2			0.2
Stock-based compensation	1.5			1.5				1.5
Proceeds pursuant to stock-based compensation plans	2.8			2.8				2.8
Treasury stock issued pursuant to equity-based plans (in shares)		0.1
Treasury stock issued pursuant to equity-based plans	0.3			(3.2)			3.5	0.3
Noncontrolling interest in Make Believe Ideas			$ 0.0
Dividends ($0.15 per share)	(5.3)					(5.3)		(5.3)
Balance (in shares) at Aug. 31, 2018		33.4	1.7
Balance (in shares) at May. 31, 2018		33.3	1.7
Balance at May. 31, 2019	1,272.8	$ 0.4	$ 0.0	620.8	(59.7)	1,012.6	(302.6)	1,271.5	1.3
Balance at Aug. 31, 2019	1,196.7	$ 0.4	$ 0.0	622.2	(61.5)	948.9	(314.6)	1,195.4	$ 1.3
Net Income (loss)	(58.5)					(58.5)		(58.5)
Foreign currency translation adjustment	(2.0)				(2.0)			(2.0)
Pension and post-retirement adjustments (net of tax of $0.0)	0.2				$ 0.2			0.2
Stock-based compensation	1.5			1.5				1.5
Purchases of treasury stock at cost (in shares)		(0.3)
Purchases of treasury stock at cost	(12.6)						(12.6)	(12.6)
Treasury stock issued pursuant to equity-based plans (in shares)		0.0
Treasury stock issued pursuant to equity-based plans	0.5			$ (0.1)			$ 0.6	0.5
Dividends ($0.15 per share)	$ (5.2)					$ (5.2)		$ (5.2)
Balance (in shares) at Aug. 31, 2019		33.1	1.7
Balance (in shares) at May. 31, 2019		33.4	1.7