Pension and Other Postretirement Benefits - Schedule of Weighted-average Assumptions Used to Determine Net Periodic Benefit Cost (Details)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.06%	3.12%	3.61%
Expected long-term rate of return on plan assets	6.22%	6.21%	6.68%
Long-term rate of compensation increase	3.29%	3.29%	3.31%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.04%	2.99%	3.60%
Expected long-term rate of return on plan assets	6.25%	6.25%	6.25%