POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - DEFINED CONTRIBUTION RETIREMENT PLANS - ADDITIONAL INFORMATION (Details)	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan Contribution Rate	14.00%	14.00%	14.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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