POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - FAIR VALUE OF PLAN ASSETS - ADDITIONAL INFORMATION (Details) - Pension Plan - USD ($) $ in Millions		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	$ 10,269	$ 10,605	$ 11,098
Fair Value, Inputs, Level 2 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		262	266
Fair Value, Inputs, Level 3 | Other Assets
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[2]	$ 128	$ 123

[1] Primarily non-U.S.-based defined benefit retirement plans.

[2] The Company's other pension and other retiree benefit plan assets measured at fair value are generally classified as Level 3 within the fair value hierarchy. There are no material other pension and other retiree benefit plan asset balances classified as Level 1 within the fair value hierarchy.