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Derivatives and Hedging (Narratives) (Details)
$ in Millions
12 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Contract
Jun. 30, 2018
USD ($)
Interest Rate Swap      
Derivative [Line Items]      
Notional principal amount of forward foreign currency contracts $ 200.0    
Maturity date Apr. 30, 2023    
Unrealized loss on interest rate cash flow hedges $ 1.8    
Estimated interest expense over next twelve months 0.8    
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts      
Derivative [Line Items]      
Foreign currency transactions realized gain (loss) 0.6 $ 0.1 $ (1.2)
Number of derivative financial instruments | Contract   0  
Notional principal amount of forward foreign currency contracts $ 4.0    
Maximum maturities for contracts 30 days    
Maximum      
Derivative [Line Items]      
Foreign currency transactions realized gain (loss) $ 0.1 $ 0.1 $ 0.1