Contingencies and Commitments - Environmental (Details) - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Liabilities to be paid	$ 2,400,000
(Decrease) increase made by the company in the liabilities of environmental remediation costs	$ (100,000)	$ 0	$ (100,000)
Percentage of reimbursement	31.40%
Maximum capital expenditure costs	$ 7,500,000
Environmental remediation liability	$ 18,300,000	$ 16,000,000