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Environmental Matters (Tables) | 9 Months Ended
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Sep. 30, 2025
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Environmental Obligations Recognized by Company | The following table sets forth a summary of changes in the Company’s liability for Environmental Obligations for the nine months ended September 30, 2025 and 2024.
Environmental Obligations (millions) |
|  | September 30, |
|  | 2025 |  |  | 2024 |
Total Balance at Beginning of Period |  | $ | 7.8 |  |  | $ | 4.7 |
Additions |  |  | 1.5 |  |  |  | 0.4 |
Less: Payments / Reductions |  |  | 0.5 |  |  |  | 0.3 |
Total Balance at End of Period |  |  | 8.8 |  |  |  | 4.8 |
Less: Current Portion |  |  | 0.8 |  |  |  | 0.8 |
Noncurrent Balance at End of Period |  | $ | 8.0 |  |  | $ | 4.0 |

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- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-10 + Details
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