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Goodwill and Intangible Assets - Schedule of Acquired Finite Lived Intangible Assets by Major Class (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  |  |  | $ 1,111.0 | $ 1,293.4 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  | (246.5) | (182.3) |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 864.5 | 1,111.1 |
Amortization of intangible assets |  |  |  |  |  | 95.4 | 99.4 | $ 75.3
Computer Software, Intangible Asset [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  |  |  | 45.8 | 38.0 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  | (27.6) | (20.1) |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 18.2 | 17.9 |
Customer Platforms - Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  |  |  | 856.2 | 952.2 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  | (174.4) | (123.5) |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 681.8 | 828.7 |
Customer Relationships - Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  |  |  | 53.0 | 147.0 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  | (9.4) | (16.5) |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 43.6 | 130.5 |
Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  |  |  |  |  | 156.0 | 156.2 |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  |  |  |  | (35.1) | (22.2) |
Finite-Lived Intangible Assets, Net |  |  |  |  |  | 120.9 | 134.0 |
Casting [Member] | Customer Platforms - Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible Assets, Written off Related to Sale of Business Unit, Gross |  |  |  |  |  | 96.0 |  |
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization |  |  |  |  |  | 17.2 |  |
Casting [Member] | Customer Relationships - Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible Assets, Written off Related to Sale of Business Unit, Gross |  |  |  |  |  | 94.0 |  |
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization |  |  |  |  |  | $ 14.6 |  |
Powertrain [Member] | Customer Relationships - Intangible Assets [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible Assets, Written off Related to Sale of Business Unit, Gross |  |  |  |  |  |  | 4.8 |
Intangible Assets, Written off Related to Sale of Business Unit, Accumulated Amortization |  |  |  |  |  |  | $ 0.3 |
Forecast [Member] |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization of intangible assets | $ 87.0 | $ 87.0 | $ 87.0 | $ 87.0 | $ 87.0 |  |  |

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