EMPLOYEE BENEFIT PLANS (Net Actuarial Loss (Gain) and Prior Service Cost (Benefit) Activity Recorded in Accumulated Other Comprehensive Loss (Income)) (Details) $ in Millions	12 Months Ended
Jun. 30, 2018 USD ($)
Retirement Income Plans [Member] \| Other Postretirement Benefits Plan [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net actuarial loss (gain) as of beginning of year	$ 262
Amortization during the year	(10)
Loss (gain) during the year	(10)
Net actuarial loss (gain) as of end of year	242
Retirement Health Care [Member] \| Retirement Health Care Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net actuarial loss (gain) as of beginning of year	(16)
Amortization during the year	1
Loss (gain) during the year	(2)
Net actuarial loss (gain) as of end of year	$ (17)

The accumulated change in the value of either the projected benefit obligation or the plans assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost pursuant to FAS 87 and 106.

No definition available.

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- Definition

The adjustment out of other comprehensive income for actuarial gains (losses) recognized as a component of net periodic benefit cost during the period.

+ References

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580

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