Commitments and contingencies - Changes in Accrued Environmental Remediation and Related Costs (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Commitments and contingencies | |||
| Balance at the beginning of the period | $ 74.6 | $ 96.9 | $ 97.3 |
| Additions charged to expense, net | 2.7 | (19.2) | 2.5 |
| Payments, net | (59.8) | (3.1) | (2.9) |
| Balance at the end of the period | 17.5 | 74.6 | 96.9 |
| Amounts recognized in the Condensed Consolidated Balance Sheet at the end of the period: | |||
| Current liabilities | 2.8 | 59.7 | 3.7 |
| Noncurrent liabilities | $ 14.7 | $ 14.9 | $ 93.2 |
| Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent |
| Total | $ 17.5 | $ 74.6 | $ 96.9 |
| Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current, Other Liabilities, Noncurrent | Accrued Liabilities, Current, Other Liabilities, Noncurrent | Accrued Liabilities, Current, Other Liabilities, Noncurrent |
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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash outflow to settle environmental loss contingencies. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Indicates line item in statement of financial position that includes accrual for environmental loss contingency classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Indicates line item in statement of financial position that includes accrual for environmental loss contingency. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount added to the accrual and charged to expense for newly incurred environmental loss contingencies and revisions to existing environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates not charged to expense. No definition available.
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- Definition Accrued environmental loss contingencies. No definition available.
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