EMPLOYEE BENEFIT PLANS (Information for Retirement Income Plans with Accumulated Benefit Obligation in Excess of Plan Assets) (Details) - Retirement Income Plans [Member] - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 167	$ 571
Accumulated benefit obligation	166	571
Fair value of plan assets	$ 0	$ 395