BENEFIT PLANS - Benefit Plan Assumptions (Details)	12 Months Ended
Jul. 31, 2021	Aug. 01, 2020	Aug. 03, 2019
Net periodic benefit cost assumptions:
Rate of compensation increase	0.00%	0.00%	0.00%
Interest credit	5.00%	5.00%	5.00%
Retirement Plan, Before Age 65 \| Postemployment Retirement Benefits
Net periodic benefit cost assumptions:
Assumed healthcare cost trend rate	8.10%
Ultimate healthcare cost trend rate	4.50%
Retirement Plan, After Age 65 \| Postemployment Retirement Benefits
Net periodic benefit cost assumptions:
Assumed healthcare cost trend rate	5.40%
Minimum
Benefit obligation assumptions:
Discount rate	2.62%	1.74%	2.99%
Net periodic benefit cost assumptions:
Discount rate	1.17%	2.99%	4.30%
Expected return on plan assets	1.00%	2.00%	2.25%
Maximum
Benefit obligation assumptions:
Discount rate	2.75%	2.37%	3.49%
Net periodic benefit cost assumptions:
Discount rate	2.27%	3.49%	4.42%
Expected return on plan assets	5.50%	5.75%	6.50%

Defined Benefit Plan, Health Care Cost Trend Rate Assumed

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

+ References

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920

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- Definition

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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- Definition

Weighted-average interest crediting rate used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, cash balance and other defined benefit plans with promised interest crediting rate.

+ References

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- Definition

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

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