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Income Tax (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income Tax Examination [Line Items] |  |  |  |
Effective income tax rate (as a percent) | 10.10% | 42.30% | (15.10%) | 37.10%
Contingent liabilities - Pfenex |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Reduction in contingent liability | $ 3.8 |  | $ 37.6 |

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