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Derivative Financial Instruments and Hedging - Summary of Notional Amounts and Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Derivative [Line Items]    
Gross notional amount $ 3,002.0 $ 1,697.0
Total 12.7 (1.0)
Other current assets    
Derivative [Line Items]    
Derivative asset fair value 13.0 1.3
Other current liabilities    
Derivative [Line Items]    
Liabilities at fair value (0.3) (2.3)
Designated    
Derivative [Line Items]    
Gross notional amount 2,530.0 863.0
Total 13.0 (2.3)
Designated | Other current assets    
Derivative [Line Items]    
Derivative asset fair value 13.0 0.0
Designated | Other current liabilities    
Derivative [Line Items]    
Liabilities at fair value 0.0 (2.3)
Non-Designated    
Derivative [Line Items]    
Gross notional amount 472.0 834.0
Total (0.3) 1.3
Non-Designated | Other current assets    
Derivative [Line Items]    
Derivative asset fair value 0.0 1.3
Non-Designated | Other current liabilities    
Derivative [Line Items]    
Liabilities at fair value $ (0.3) $ 0.0