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EMPLOYEE BENEFIT PLANS (Weighted-Average Assumptions Used to Estimate the Net Periodic Pension and Other Postretirement Benefit Costs) (Details)
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Retirement Income [Member]      
Weighted-average assumptions used to estimate the actuarial present value of benefit obligations:      
Discount rate 3.42% 4.20%  
Rate of compensation increase 2.92% 3.37%  
Weighted-average assumptions used to estimate the net periodic pension and other postretirement benefit costs:      
Discount rate 4.20% 4.05% 4.39%
Rate of compensation increase 3.37% 4.46% 3.44%
Expected return on plan assets 4.34% 5.28% 6.61%
Retirement Health Care [Member]      
Weighted-average assumptions used to estimate the actuarial present value of benefit obligations:      
Discount rate 3.42% 4.16%  
Weighted-average assumptions used to estimate the net periodic pension and other postretirement benefit costs:      
Discount rate 4.16% 4.00% 4.33%