SHARE-BASED COMPENSATION AND POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract]
Share-based Payment Arrangement, Expense		$ 92	$ 79	$ 202	$ 181
Pension Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	[1]	44	36	84	64
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)	$ (42)	$ (104)	$ (83)

[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.