Pension and Other Postretirement Benefits - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Eligible Age for Availing Postretirement Healthcare Benefits	65
Special termination benefit charge		$ 277,000
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (2,600,000)	(16,800,000)	$ (13,700,000)
Defined Contribution Plan, Cost	15,800,000	14,200,000	13,300,000
Defined Benefit Plan, Non-cash Settlement Charge	2,800,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Other Adjustments	(7,000)	(5,000)
Pension plans contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	(1,260,000)	(1,805,000)
Accumulated Benefit Obligation for all Defined Benefit Pension Plans	695,300,000	740,400,000
Net Periodic Pension Cost	(1,950,000)	(15,990,000)	(12,336,000)
Special termination benefit charge	431,000		(473,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(18,000)	(205,000)	(3,190,000)
Projected Benefit Payments for 2023	55,500,000
Projected Benefit Payments for 2024	55,600,000
Projected Benefit Payments for 2025	55,100,000
Projected Benefit Payments for 2026	55,100,000
Projected Benefit Payments for 2027	54,200,000
Projected Benefit Payments for 2028 through 2032	258,200,000
Accumulated Other Comprehensive Loss Expected to be Recognized in Net Periodic Pension Cost related to Net Actuarial Losses	5,700,000
Estimated Future Employer Contributions	9,300,000
Service Cost	963,000	1,117,000	1,685,000
Other postretirement benefit plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Pension Cost	338,000	$ 309,000	$ 338,000
Projected Benefit Payments for 2023	1,100,000
Projected Benefit Payments for 2024	1,000,000
Projected Benefit Payments for 2025	900,000
Projected Benefit Payments for 2026	900,000
Projected Benefit Payments for 2027	800,000
Projected Benefit Payments for 2028 through 2032	3,100,000
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	$ 1,100,000