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EMPLOYEE BENEFIT PLANS (Items Not Yet Recognized as a Component of Postretirement Expense) (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | ---
Retirement Income | Retirement Income |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net actuarial loss (gain) | $ 226 | $ 240
Prior service benefit | 0 |
Net deferred income tax (assets) liabilities | (54) |
Accumulated other comprehensive loss (income) | 172 |
Retirement Health Care | Retirement Health Care |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net actuarial loss (gain) | (10) | $ (12)
Prior service benefit | 0 |
Net deferred income tax (assets) liabilities | 2 |
Accumulated other comprehensive loss (income) | $ (8) |

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