Contingencies and Commitments - Environmental (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
(Decrease) increase made by the company in the liabilities of environmental remediation costs	$ (1.8)	$ 2.3
Environmental remediation liability	$ 16.5	18.3
Environmental charges		$ 2.4