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Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Eligible Age for Availing Postretirement Healthcare Benefits | 65 |  |
Special termination benefit charge |  | $ 14,000 | $ 431,000
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | $ 1,300,000 | (2,900,000) | (2,600,000)
Defined Contribution Plan, Cost | 16,500,000 | 16,300,000 | 15,800,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Other Adjustments | 93,000 | 4,335,000 |
Pension plans contribution [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement | (3,480,000) | (668,000) |
Accumulated Benefit Obligation for all Defined Benefit Pension Plans | 666,000,000.0 | 674,200,000 |
Net Periodic Pension Cost | 1,925,000 | (2,025,000) | (1,950,000)
Special termination benefit charge | 302,000 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | (954,000) | 4,000 | (18,000)
Projected Benefit Payments for 2023 | 56,800,000 |  |
Projected Benefit Payments for 2024 | 57,200,000 |  |
Projected Benefit Payments for 2025 | 55,600,000 |  |
Projected Benefit Payments for 2026 | 54,300,000 |  |
Projected Benefit Payments for 2027 | 53,300,000 |  |
Projected Benefit Payments for 2028 through 2032 | 247,700,000 |  |
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost related to Net Actuarial Losses | 11,600,000 |  |
Estimated Future Employer Contributions | 7,300,000 |  |
Service Cost | 909,000 | 1,181,000 | 963,000
Other postretirement benefit plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net Periodic Pension Cost | 278,000 | $ 312,000 | $ 338,000
Projected Benefit Payments for 2023 | 1,000,000.0 |  |
Projected Benefit Payments for 2024 | 900,000 |  |
Projected Benefit Payments for 2025 | 800,000 |  |
Projected Benefit Payments for 2026 | 700,000 |  |
Projected Benefit Payments for 2027 | 700,000 |  |
Projected Benefit Payments for 2028 through 2032 | 2,700,000 |  |
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost related to Net Actuarial Losses | 100,000 |  |
Accumulated Other Comprehensive Income Expected to be Recognized in Net Periodic Pension Cost related to Prior Service Credit | 300,000 |  |
Estimated Future Employer Contributions | $ 1,000,000 |  |

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