CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2024	Jun. 30, 2023
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 24.3	$ 23.2
Convertible Series B preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible Series B preferred stock, shares authorized (in shares)	1,000,000.0	1,000,000.0
Convertible Series B preferred stock, shares issued (in shares)	100,000	100,000
Convertible Series B preferred stock, shares outstanding (in shares)	100,000	100,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000.0	20,000,000.0
Preferred stock, shares issued (in shares)	1,000,000.0
Preferred stock, shares outstanding (in shares)	1,000,000.0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,250,000,000	1,250,000,000
Common stock, shares issued (in shares)	962,100,000	919,300,000
Common stock, shares outstanding (in shares)	867,800,000	852,800,000
Treasury stock (in shares)	94,300,000	66,500,000