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OTHER LONG-TERM LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2021
Other Liabilities Disclosure [Abstract] |
Schedule of other long-term liabilities | Other long-term liabilities consisted of the following:
(in millions) |  | December 31, 2021 |  | December 31, 2020
Environmental liabilities |  | $ | 142.1 |  |  | $ | 141.9 |
Defined benefit pension plan liabilities |  | 47.0 |  |  | 73.5 |
Contingent consideration |  | 29.4 |  |  | — |
Post-retirement medical plan liabilities |  | 18.2 |  |  | 22.0 |
Early railcar return liability |  | 6.0 |  |  | 13.9 |
Other |  | 9.7 |  |  | 17.2 |
Total other long-term liabilities |  | $ | 252.4 |  |  | $ | 268.5 |

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