EMPLOYEE BENEFIT PLANS (Net Actuarial Loss (Gain) and Prior Service Cost (Benefit) Activity Recorded in Accumulated Other Comprehensive Loss (Income)) (Details) $ in Millions	12 Months Ended
	Jun. 30, 2017 USD ($)
Retirement Income Plans [Member] | Other Postretirement Benefit Plan [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net actuarial loss (gain) as of beginning of year	$ 296
Amortization during the year	(11)
Loss (gain) during the year	(23)
Net actuarial loss (gain) as of end of year	262
Retirement Health Care [Member] | Retirement Health Care Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net actuarial loss (gain) as of beginning of year	(13)
Amortization during the year	1
Loss (gain) during the year	(4)
Net actuarial loss (gain) as of end of year	$ (16)