Pension and Other Postretirement Benefits - Summary of Weighted-average Asset Allocations by Asset Category (Details) - Pension Benefits	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total	45.90%	43.80%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total	37.80%	40.10%
Real assets securities
Defined Benefit Plan Disclosure [Line Items]
Total	16.30%	16.10%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details