SUPPLEMENTAL FINANCIAL INFORMATION - ADDITIONAL INFORMATION (Details) $ in Millions	12 Months Ended			24 Months Ended	72 Months Ended
	Jun. 30, 2017 USD ($) employees	Jun. 30, 2016 USD ($) employees	Jun. 30, 2015 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2017 USD ($) employees
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					$ 5,600
Restructuring Charges	$ 754	$ 977	$ 1,068
Severance Packages | employees	2,120	2,770			19,190
Severance Packages - Non Manufacturing Overhead | employees	380	920			9,920
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 137	$ 202
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	593	718
Non-manufacturing Overhead Personnel
Restructuring Cost and Reserve [Line Items]
Number of Positions Eliminated, Period Percent					26.00%
Separations
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	206	262			$ 2,500
Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	397	432			1,800
Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	151	$ 283			1,300
Minimum
Restructuring Cost and Reserve [Line Items]
Historical Restructuring Costs Before Tax	250				$ 250
Minimum | Non-manufacturing Overhead Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring And Related Cost, Expected Number Of Positions Eliminated, Percent					25.00%
Maximum
Restructuring Cost and Reserve [Line Items]
Historical Restructuring Costs Before Tax	$ 500				$ 500
Maximum | Non-manufacturing Overhead Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring And Related Cost, Expected Number Of Positions Eliminated, Percent					30.00%
Subsequent Event
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Over Multiple Years				$ 1,200