POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - COMPONENTS OF NET PERIODIC BENEFIT COST - ADDITIONAL INFORMATION (Details) - Other Retiree Benefits - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017		Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Other Costs	$ 21	[1]	$ 12	$ 23
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Other Costs	$ 18

[1] Amortization of net actuarial loss / prior service cost due to settlement and curtailments and $18 of the special termination benefits are included in Net earnings from discontinued operations.