EMPLOYEE BENEFIT PLANS (Components of the Net Cost of Retirement Income and Health Care Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 15	$ 10	$ 14
Retirement Income | Retirement Income
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	1
Interest cost	15	20	23
Expected return on plan assets	(16)	(19)	(18)
Settlement loss recognized	5	0	0
Amortization of unrecognized items	11	10	9
Total	17	12	15
Retirement Health Care | Retirement Health Care
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	1	1	2
Expected return on plan assets	0	0	0
Settlement loss recognized	0	0	0
Amortization of unrecognized items	(2)	(3)	(3)
Total	$ (1)	$ (2)	$ (1)