Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Sales:
Sales	$ 436.6	$ 403.6	$ 891.7	$ 804.4
Cost and operating expenses:
Provision for doubtful accounts	0.8	4.4	0.8	4.4
Selling, general and administrative	47.1	43.4	96.4	88.7
Total cost and operating expenses	406.1	381.9	845.9	779.4
Loss from joint ventures	(0.4)	(0.1)	(0.6)	(0.2)
Operating income	30.1	21.6	45.2	24.8
Loss on sale of business	(1.3)		(1.3)	(19.5)
Other income (expense), net	0.3	(0.7)	1.0	(0.5)
Interest expense	(0.5)	(1.3)	(1.2)	(3.0)
Interest income	0.1		0.1	0.1
Income from continuing operations before provision for income taxes	28.7	19.6	43.8	1.9
Provision for income taxes	7.9	5.2	11.8	1.4
Income from continuing operations	20.8	14.4	32.0	0.5
Income (Loss) from discontinued operations, net of tax		(6.2)	0.3	(6.8)
Net income (loss)	$ 20.8	$ 8.2	$ 32.3	$ (6.3)
Earnings (Loss) per share - basic:
Earnings from continuing operations	$ 0.59	$ 0.41	$ 0.90	$ 0.01
Income (Loss) from discontinued operations	0	(0.18)	0.01	(0.20)
Earnings (Loss) per share - basic	0.59	0.23	0.91	(0.19)
Earnings (Loss) per share - diluted:
Earnings from continuing operations	0.58	0.41	0.89	0.01
Income (Loss) from discontinued operations	0	(0.18)	0.01	(0.19)
Earnings (Loss) per share - diluted	$ 0.58	$ 0.23	$ 0.90	$ (0.18)
Products
Sales:
Sales	$ 252.0	$ 233.1	$ 514.1	$ 469.4
Cost and operating expenses:
Cost	202.1	194.3	419.7	398.8
Services
Sales:
Sales	184.6	170.5	377.6	335.0
Cost and operating expenses:
Cost	$ 156.1	$ 139.8	$ 329.0	$ 287.5