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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Effective income tax rate | 0.10% |  |  | (71.70%) |  |  | 8.70% | (95.70%)
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Impairment charges (reversals) - net | $ (57.2) |  |  | $ 134.4 |  |  | $ (55.7) | $ 134.4
Income tax benefits from impairment charges |  |  |  | (37.7) |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Income tax expense (benefit) related to change in deferred tax asset valuation allowance |  | $ 1.6 |  | 109.9 | $ 6.6 |  | (11.4) | $ 116.5
Foreign Jurisdictions [Member] |  |  |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Income tax expense (benefit) related to change in deferred tax asset valuation allowance | (8.2) |  | $ (4.8) |  |  |  | (13.0) |
Valuation allowance | 21.9 |  |  |  |  |  | 21.9 |
U.S. [Member] |  |  |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Valuation allowance | 90.1 |  |  |  |  |  | 90.1 |
Liquid-Cooled Automotive Business [Member] |  |  |  |  |  |  |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |
Impairment charges (reversals) - net | $ (57.2) |  |  | $ 134.4 |  | $ 1.2 | $ (56.0) |

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