SHARE-BASED COMPENSATION AND POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]
Share-based Payment Arrangement, Expense		$ 123	$ 118	$ 325	$ 299
Pension Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	[1]	42	30	126	94
Other Postretirement Benefit Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	[1]	$ (52)	$ (41)	$ (156)	$ (124)

[1] The components of the total net periodic benefit cost for both pension benefits and other retiree benefits for these interim periods, on an annualized basis, do not differ materially from the amounts disclosed in the Annual Report on Form 10-K for the fiscal year ended June 30, 2019.