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EMPLOYEE BENEFIT PLANS (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Domestic Defined Contribution Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Aggregate cost of the defined contribution plans | $ 49 | $ 47 | $ 47
International Defined Contribution Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Aggregate cost of the defined contribution plans | 4 | 3 | 3
Retirement Income Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discretionary contributions | 63 | 21 | 31
Retirement Income Plans [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discretionary contributions | 63 | 22 |
Future amortization of gain (loss) | (9) |  |
Accumulated benefit obligation | 603 | 592 | $ 632
Retirement Health Care [Member] | Retirement Health Care Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discretionary contributions | 3 | $ 4 |
Future amortization of gain (loss) | $ 3 |  |

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