SHARE-BASED COMPENSATION AND POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Allocated Share-based Compensation Expense		$ 79	$ 73	$ 181	$ 157
Pension Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	[1]	36	52	64	103
Other Postretirement Benefit Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	[1]	$ (42)	$ (38)	$ (83)	$ (76)

[1] The components of the total net periodic benefit cost for both pension benefits and other retiree benefits for those 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, 2018, as revised by the Form 8-K filed October 22, 2018 to update the Form 10-K to revise disclosures to reflect the adoption of the Financial Accounting Standards Board (FASB) ASU 2017-07 and 2016-18.