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Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Jun. 30, 2018
Fair Value [Line Items]    
Debt Instrument, Fair Value Disclosure $ 622.0 $ 996.4
Contracts Translated to U S Dollars [Member]    
Fair Value [Line Items]    
Derivative, Notional Amount 61.5 62.9
Estimated Amount Of Receivable On Settlement Of Foreign Exchange Contracts 0.2 0.8
Foreign Exchange Contract [Member]    
Fair Value [Line Items]    
Derivative, Notional Amount $ 61.5 $ 62.9