EMPLOYEE BENEFIT PLANS (Narrative) (Details) $ in Millions	12 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($) item	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Scenario, Forecast [Member] | United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Future amortization of gain (loss)	$ (7)
Scenario, Forecast [Member] | Retirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Future amortization of gain (loss)	$ 3
Retirement Income Plans [Member] | United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions		$ 31	$ 31	$ 13
Retirement Income Plans [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions		31	31
Accumulated benefit obligation		$ 632	596	559
Domestic Retirement Health Care Plans [Member] | Retirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current assumed trend		6.50%
Ultimate trend rate		4.50%
Basis point increase (decrease) | item		100
Domestic Defined Contribution Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate cost of the defined contribution plans		$ 47	45	45
International Defined Contribution Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate cost of the defined contribution plans		$ 3	$ 3	$ 3