PENSION AND OTHER POSTRETIREMENT BENEFITS Effect of one-percentage point change in assumed healthcare trend (Details) - Postretirement Health Benefits $ in Thousands	12 Months Ended
Jul. 31, 2019 USD ($)
Defined Benefit Plans and Postretirement Health Benefits
Effect of One Percentage Point Increase on total service and interest cost	$ 26
Effect of One Percentage Point Decrease on total service and interest cost	(22)
Effect of One Percentage Point Increase on accumulated postretirement benefit obligation	301
Effect of One Percentage Point Decrease on accumulated postretirement benefit obligation	$ (267)

Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate.

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 (m)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate.

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Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate.

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Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate.

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