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Subsequent Events (Details) - USD ($)
$ in Millions
Jul. 15, 2020
Jun. 30, 2020
Jun. 30, 2019
Subsequent Event [Line Items]      
Notes Payable   $ 2,008.4 $ 2,010.9
Notes due on 2020 [Member]      
Subsequent Event [Line Items]      
Notes Payable     $ 1,000.0
Subsequent Event [Member] | Notes due on 2020 [Member]      
Subsequent Event [Line Items]      
Notes Payable $ 1,000.0    
Debt Instrument, Interest Rate, Stated Percentage 2.25%