PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Changes in Level 3 Plan Assets (Details) $ in Millions	12 Months Ended
Jun. 30, 2018 USD ($)
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	$ 1,366
Actual return on plan assets:
Fair value of plan assets at end of year	1,433
Level 3
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	48
Actual return on plan assets:
Fair value of plan assets at end of year	49
Insurance contracts
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	48
Actual return on plan assets:
Fair value of plan assets at end of year	49
Insurance contracts \| Level 3
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	48
Actual return on plan assets:
Relating to assets still held at the reporting date	1
Purchases, sales, issuances and settlements, net	(1)
Foreign exchange impact	1
Fair value of plan assets at end of year	$ 49

No definition available.

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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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.

+ Details

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- Definition

Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

+ Details

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from purchases, sales and settlements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(iv)(02)(B)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Details

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