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Fair Value of Financial Instrument (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 15.3 $ 39.3
Derivative liabilities $ 26.7 $ 15.0
Senior Notes Due 2025, 1.002% [Member] [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Interest Rate 1.002% 1.002%
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 0.0 $ 0.0
Derivative liabilities 0.0 0.0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 15.3 39.3
Derivative liabilities 26.7 15.0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0.0 0.0
Derivative liabilities $ 0.0 $ 0.0