PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Changes in Level 3 Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	$ 1,568
Actual return on plan assets:
Fair value of plan assets at end of year	1,686	$ 1,568
Level 3
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	49
Actual return on plan assets:
Fair value of plan assets at end of year	54	49
Insurance contracts
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	49
Actual return on plan assets:
Fair value of plan assets at end of year	54	49
Insurance contracts \| Level 3
Changes in Level 3 plan assets
Fair value of plan assets at beginning of year	49	49
Actual return on plan assets:
Relating to assets still held at the reporting date	1	2
Purchases, sales, issuances and settlements, net	(1)	(2)
Foreign exchange impact	5	0
Fair value of plan assets at end of year	$ 54	$ 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

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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 of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-Publisher FASB
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- Definition

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

+ References

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- Definition

Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment.

+ References

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