PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Impact of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates (Details) - Other than Pension Plans Post-retirement $ in Millions	12 Months Ended
	Jun. 30, 2018 USD ($)
Effects of one-percentage-point change in assumed health care cost trend rates for fiscal 2018
Effect of one-percentage-point increase on total service and interest costs	$ 1
Effect of one-percentage-point decrease on total service and interest costs	(1)
Effect of one-percentage-point increase on post-retirement benefit obligations	14
Effect of one-percentage-point decrease on post-retirement benefit obligations	$ (12)