EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Weighted average long-term expected rate or return on plan assets			4.33%
Other Postretirement Benefits Plan [Member] | Retirement Income Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	6	5	12	11
Expected return on plan assets	(5)	(4)	(9)	(9)
Amortization of unrecognized items	3	2	5	5
Total	4	3	8	7
UNITED STATES | Retirement Income Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions	$ 2	$ 2	$ 4	$ 4