Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Aug. 31, 2022	May 31, 2022
Condensed Consolidated Balance Sheets
Accounts receivable, allowances	$ 17.5	$ 17.9
Property, plant, and equipment, accumulated depreciation	$ 259.7	$ 258.3
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, authorized shares	250,000	250,000
Preferred stock, issued shares	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized shares	100,000,000	100,000,000
Common stock, issued shares	45,300,786	45,300,786
Treasury stock, shares	10,217,697	9,909,702