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Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Eligible Age for Availing Postretirement Healthcare Benefits | 65 |  |
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | $ (13,700,000) | $ (15,600,000) | $ (14,300,000)
Defined Contribution Plan, Cost | 13,300,000 | 14,700,000 | 16,300,000
Defined Benefit Plan, Non-cash Settlement Charge | 2,800,000 |  |
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Other Adjustments | 149,000 |  |
Pension plans contribution [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement | (13,966,000) | (1,286,000) |
Accumulated Benefit Obligation for all Defined Benefit Pension Plans | 967,500,000 | 1,001,800,000 |
Net Periodic Pension Cost | (12,336,000) | (14,208,000) | (13,466,000)
Special termination benefit charge | 473,000 | 288,000 | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | (3,190,000) | 51,000 | 0
Projected Benefit Payments for 2020 | 53,100,000 |  |
Projected Benefit Payments for 2021 | 53,000,000.0 |  |
Projected Benefit Payments for 2022 | 55,000,000.0 |  |
Projected Benefit Payments for 2023 | 55,500,000 |  |
Projected Benefit Payments for 2024 | 55,400,000 |  |
Projected Benefit Payments for 2025 through 2029 | 268,300,000 |  |
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost during 2020 related to Net Actuarial Losses | 11,900,000 |  |
Estimated Future Employer Contributions in 2020 | 8,000,000 |  |
Service Cost | 1,685,000 | 1,796,000 | 1,627,000
Other postretirement benefit plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net Periodic Pension Cost | 338,000 | $ 385,000 | $ 771,000
Projected Benefit Payments for 2020 | 1,300,000 |  |
Projected Benefit Payments for 2021 | 1,200,000 |  |
Projected Benefit Payments for 2022 | 1,100,000 |  |
Projected Benefit Payments for 2023 | 1,000,000.0 |  |
Projected Benefit Payments for 2024 | 900,000 |  |
Projected Benefit Payments for 2025 through 2029 | 3,600,000 |  |
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost during 2020 related to Net Actuarial Losses | 300,000 |  |
Accumulated Other Comprehensive Income Expected to be Recognized in Net Periodic Pension Cost during 2020 related to Prior Service Credit | (300,000) |  |
Estimated Future Employer Contributions in 2020 | $ 1,300,000 |  |

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- Definition Eligible Age for Availing Postretirement Healthcare Benefits + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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