EMPLOYEE BENEFIT PLANS (Components of the Net Cost of Retirement Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 0	$ 0	$ 1,000,000	$ 1,000,000
Weighted average long-term expected rate or return on plan assets			3.90%
Other Postretirement Benefits Plan [Member] | Retirement Income Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	$ 0	0
Interest cost	5,000,000	5,000,000	15,000,000	17,000,000
Expected return on plan assets	(5,000,000)	(4,000,000)	(14,000,000)	(13,000,000)
Amortization of unrecognized items	3,000,000	2,000,000	7,000,000	7,000,000
Total	$ 3,000,000	$ 3,000,000	$ 8,000,000	$ 11,000,000