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Investments in Affiliates (Investment in Affiliates) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 413.5 $ 442.7
Finance joint ventures    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates 359.2 395.3
Manufacturing joint ventures    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates 31.0 31.8
Other affiliates    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 23.3 $ 15.6