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Derivative Financial Instruments (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 33.8 $ 8.0
Derivative Liabilities 38.3 9.5
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0.1 0.4
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 5.0 0.9
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1.6 7.6
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 1.2 8.6
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other Noncurrent Assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 32.1 0.0
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other Noncurrent Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 32.1 $ 0.0