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Commitments and Contingencies (Tables) | 6 Months Ended
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Jun. 30, 2021
Commitments And Contingencies Disclosure [Abstract] |
Change in Accrued Environmental Remediation and Related Costs | The table below presents a summary of the activity in our accrued environmental costs during the first six months of 2021.
|  | Amount |
|  | (In millions) |
Balance at the beginning of the year |  | $ | 98.6 |
Additions charged to expense |  |  | .9 |
Payments, net |  |  | (1.1 | )
Balance at the end of the period |  | $ | 98.4 |
Amounts recognized in our Condensed Consolidated Balance Sheet at the end of the period: |  |  |  |
Current liabilities |  | $ | 3.9 |
Noncurrent liabilities |  |  | 94.5 |
Total |  | $ | 98.4 |

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