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Pension Benefits (Net Periodic Benefit Costs Assumptions) (Details) - Pension Benefits [Member]
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.02% 4.57% 3.78%
Expected long-term return on plan assets 7.00% 7.00% 7.00%