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Earnings Per Shares (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Earnings Per Share (Textual) [Abstract]        
Increase in weighted average shares due to dilutive effect of unexercised capital stock options and unvested restricted stock units 1.3 1.0 1.2 0.7
Unexercised capital stock options and restricted stock units excluded from computation of diluted EPS   1.2 0.4 1.8