EMPLOYEE BENEFIT PLANS (Components of the Net Cost of Retirement Income and Health Care Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Retirement Health Care [Member] | Retirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0
Interest cost	2	2	2
Expected return on plan assets	0	0	0
Amortization of unrecognized items	(2)	(3)	2
Total	0	(1)	4
Retirement Income Plans [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2
Interest cost	22	26	25
Expected return on plan assets	(20)	(17)	(20)
Amortization of unrecognized items	11	10	12
Total	$ 14	$ 20	$ 19