CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	May 31, 2023	May 31, 2022
CONSOLIDATED BALANCE SHEETS
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	45,300,786	45,300,786
Treasury stock, shares issued	10,385,237	9,909,702