Pension and Other Postretirement Benefits - Schedule of Weighted Average Asset Allocations by Asset Category (Details) - Pension benefits	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Benefit plan weighted-average asset allocations percentage	100.00%	100.00%
Equity investments
Defined Benefit Plan Disclosure [Line Items]
Benefit plan weighted-average asset allocations percentage	39.00%	37.00%
Fixed income investments, including cash
Defined Benefit Plan Disclosure [Line Items]
Benefit plan weighted-average asset allocations percentage	51.00%	52.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Benefit plan weighted-average asset allocations percentage	10.00%	11.00%