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Commiments and Contingencies Commiments and Contingencies (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total contingencies | $ 13.0 | $ 13.0
Accrual for Environmental Loss Contingencies, Gross | 14.0 | 14.0
Current portion (included in Accrued liabilities) | (1.0) | (1.0)
Long-term portion (included in Other long-term liabilities) | 13.0 | 13.0
Environmental reserves |  |
Loss Contingencies [Line Items] |  |
Total contingencies | 14.0 | 14.0
Other reserves |  |
Loss Contingencies [Line Items] |  |
Total contingencies | $ 0.0 | $ 0.0

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