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Derivative Financial Instruments and Hedging - Summary of Notional Amounts and Fair Value (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Derivative [Line Items]    
Gross notional amount $ 2,251.0 $ 1,697.0
Total 1.0 (1.0)
Other current assets    
Derivative [Line Items]    
Derivative asset fair value 4.3 1.3
Other current liabilities    
Derivative [Line Items]    
Liabilities at fair value (3.3) (2.3)
Designated    
Derivative [Line Items]    
Gross notional amount 1,727.0 863.0
Total 4.3 (2.3)
Designated | Other current assets    
Derivative [Line Items]    
Derivative asset fair value 4.3 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 524.0 834.0
Total (3.3) 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 $ (3.3) $ 0.0