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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income Tax Disclosure [Abstract] |  |  |  |
Income tax expense (benefit) | $ (5.1) | $ 56.9 | $ (1.6) | $ 48.7
Increase (decrease) due to tax audit settlements |  | $ (46.2) |  |
Effective tax rate (as a percent) | 38.30% |  |  |
Discrete tax expense (benefit) from revaluation of deferred tax liabilities | $ 1.3 |  | $ 0.8 | $ 2.7

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