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RSU Measurement Date Assumptions (Details) - Restricted Stock Units (RSUs) [Member]
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
RSU grant date weighted average fair value assumptions      
Volatility 15.60% 17.80% 21.60%
Risk free interest rate 1.06% 1.06% 0.91%
Dividend yield 1.50% 1.50% 1.60%
Stock Beta 0.741 0.765 0.837