CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Feb. 28, 2025	May 31, 2024	Feb. 29, 2024
Preferred stock at par value per share (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	2,000,000.0	2,000,000.0	2,000,000.0
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common Stock, par value per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	70,000,000.0	70,000,000.0	70,000,000.0
Common stock, shares issued (in shares)	42,900,000	42,900,000	42,900,000
Common stock, shares outstanding (in shares)	25,900,000	27,400,000	27,800,000
Treasury stock (in shares)	17,100,000	15,500,000	15,100,000
Common Class A
Common Stock, par value per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,200,000	3,200,000	3,200,000
Common stock, shares issued (in shares)	800,000	800,000	800,000
Common stock, shares outstanding (in shares)	800,000	800,000	800,000