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Acquisitions - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 01, 2017 | Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Business Acquisition [Line Items] |  |  |  |  |  |
Severance costs |  | $ 1.0 |  | $ 0.8 | $ 10.6 | $ 9.6
DuPont |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Supply agreement term | 5 years |  |  |  |  |
Revenues |  | $ 26.0 |  | $ 24.0 | 77.0 | $ 87.0
DuPont | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Severance costs |  |  | $ 3.0 |  |  |
DuPont | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Severance costs |  |  |  |  | $ 2.0 |

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