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Pension Benefits (Net Periodic Benefit Costs Assumptions) (Details) - Defined Benefit Pension Plans [Member]
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.07% 3.68% 3.39%
Expected long-term return on plan assets 7.00% 7.00% 7.00%