Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Aug. 31, 2025	May 31, 2025
Condensed Consolidated Balance Sheets
Accounts receivable, allowances	$ 12.4	$ 10.7
Property, plant, and equipment, net of accumulated depreciation	285.1	278.7
Intangible assets, net of accumulated amortization	$ 33.6	$ 29.5
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	45,300,786	45,300,786
Treasury stock, shares issued	9,188,295	9,470,781