PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Assumed Health Care Cost Trend Rates (Details) - Other than Pension Plans Post-retirement	12 Months Ended
Jun. 30, 2018
Assumed health care cost trend rates
Assumed weighted-average health care cost trend rate for the coming year (as a percent)	6.66%
Weighted-average ultimate trend rate (as a percent)	4.53%
Period after which ultimate trend rate is expected to be reached	18 years

The period after which the ultimate health care cost trend rate is expected to be reached.

No definition available.

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- References

No definition available.

+ Details

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- Definition

Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

+ 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 (l)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

+ Details

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- Definition

Ultimate trend rate for health care cost for defined benefit postretirement plan.

+ References

+ Details

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- Details

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