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Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Jun. 30, 2016
Fair Value [Line Items]    
Debt Instrument, Fair Value Disclosure $ 704.0  
Contracts Translated to U S Dollars [Member]    
Fair Value [Line Items]    
Derivative, Notional Amount 75.3 $ 53.3
Estimated Amount Of Receivable On Settlement Of Foreign Exchange Contracts (0.8) 0.3
Foreign Exchange Contract [Member]    
Fair Value [Line Items]    
Derivative, Notional Amount $ 75.3 $ 53.3