Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 12.5	$ 9.7
Preferred stock, shares authorized (in shares)	25,000,000.0	25,000,000.0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	650,000,000.0	650,000,000.0
Common stock, shares issued (in shares)	154,500,000	154,500,000
Common stock, shares outstanding (in shares)	117,100,000	116,700,000
Treasury stock, shares (in shares)	37,300,000	37,800,000