Contingencies (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
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| Superfund sites | ||||||
| Other Matters | ||||||
| Loss contingency accrual | $ 20.0 | $ 21.0 | $ 38.0 | |||
| Cuyahoga Valley National Park | ||||||
| Other Matters | ||||||
| Payments for legal settlements | $ 11.0 | |||||
| Anticipated future costs | $ 50.0 | |||||
| Cuyahoga Valley National Park | Location, Statement of Income, Balance [Axis]: us-gaap:OtherOperatingIncomeExpenseNet | ||||||
| Other Matters | ||||||
| Litigation settlement charge | $ 16.5 | $ 4.0 | ||||
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- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of loss contingency liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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