Pension and Other Postretirement Benefits - Schedule of Weighted-average Asset Allocations by Asset Category (Details) - Pension Benefits	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total	43.80%	42.40%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total	40.10%	31.60%
Real assets securities
Defined Benefit Plan Disclosure [Line Items]
Total	16.10%	26.00%