EMPLOYEE BENEFIT PLANS (Items Not Yet Recognized as a Component of Postretirement Expense) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Retirement Income Plans [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 262	$ 296
Prior service benefit	0
Net deferred income tax (assets) liabilities	(98)
Accumulated other comprehensive loss (income)	164
Retirement Health Care [Member] | Retirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(16)	$ (13)
Prior service benefit	(5)
Net deferred income tax (assets) liabilities	7
Accumulated other comprehensive loss (income)	$ (14)