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Investments in Affiliates (Investment in Affiliates) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 519.6 $ 512.7
Finance joint ventures    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates 471.4 464.3
Manufacturing joint ventures    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates 31.4 30.6
Other affiliates    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 16.8 $ 17.8