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EMPLOYEE BENEFIT PLANS - Target and weighted-average asset allocations (Details) - U.S. Pension Plan
Jun. 30, 2017
Jun. 30, 2016
Equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Target Plan Asset Allocations 50.00%  
Actual Plan Asset Allocations 41.00% 25.00%
Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Target Plan Asset Allocations 40.00%  
Actual Plan Asset Allocations 39.00% 35.00%
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Target Plan Asset Allocations 10.00%  
Actual Plan Asset Allocations 20.00% 40.00%