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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