Employee Benefit Plans - Schedule of Components of Net Pension (Income)/Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Retirement Benefits [Abstract] | ||||
| Service cost – benefits earned during the period | $ 2.0 | $ 1.5 | $ 5.9 | $ 4.5 |
| Interest cost on projected benefits | 21.7 | 21.8 | 65.2 | 65.5 |
| Expected return on plan assets | (28.3) | (29.0) | (84.9) | (87.0) |
| Net amortization and deferral | 0.7 | 0.7 | 2.2 | 2.2 |
| Net pension (income)/expense | $ (3.9) | $ (5.0) | $ (11.6) | $ (14.8) |
| X | ||||||||||
- References No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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