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Basis of Presentation Basis of Presentation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 9 Months Ended
Mar. 31, 2017
Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]    
Effect of new accounting standard compared to old standard $ 0.5  
Effect of adoption of new accounting standard compared to old standard, EPS $ 0.02  
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted   The amendments relating to the presentation of excess tax benefits and tax deficiencies in the statement of cash flows were applied retrospectively. The effect of the retrospective adjustment was to eliminate the presentation of an operating cash outflow and a financing cash inflow for excess tax benefits on exercised stock options and vesting of deferred shares. These eliminations increased net cash provided by operating activities by $3.2 million and decreased net cash provided by financing activities by $3.2 million for the nine months ended March 31, 2016. Net cash flows did not change as a result of the retrospective adjustment.