EMPLOYEE BENEFIT PLANS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member] | Retirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit	$ 1	$ 1	$ 1	$ 1
Other Postretirement Benefits Plan [Member] | Retirement Income Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit	(2)	(4)	(5)	(8)
UNITED STATES | Retirement Income Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions	$ 2	$ 2	$ 4	$ 4