POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - AMOUNTS EXPECTED TO BE AMORTIZED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME INTO NET PERIODIC BENEFIT COST (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Jun. 30, 2016
USD ($)
| |
| Pension Benefits | |
| Net actuarial loss | $ 270 |
| Prior service cost (credit) | 30 |
| Other Retiree Benefits | |
| Net actuarial loss | 78 |
| Prior service cost (credit) | $ (52) |