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New Accounting Standards New Accounting Standards - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
New Accounting Standards [Abstract]    
Excess Tax Benefit from Share-based Compensation, Financing Activities $ 1.4  
Payments Related to Tax Withholding for Share-based Compensation   $ 2.8