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PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands | Jul. 31, 2021 | Jul. 25, 2020
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | $ 83 | $ 61
Equity Securities [Abstract] |  |
Mutual/Collective Trust Funds - U.S. | 1,174 | 1,214
Mutual/Collective Trust Funds - International | 387 | 396
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 60,891 | 68,439
Total | 63,047 | 70,683
Defined Benefit Plan, Equity Securities, Common Stock, Employer, Related Party |  |
Equity Securities [Abstract] |  |
Company stock | 512 | 573
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 83 | 61
Equity Securities [Abstract] |  |
Mutual/Collective Trust Funds - U.S. | 0 | 0
Mutual/Collective Trust Funds - International | 0 | 0
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 0 | 0
Total | 595 | 634
Level 1 | Defined Benefit Plan, Equity Securities, Common Stock, Employer, Related Party |  |
Equity Securities [Abstract] |  |
Company stock | 512 | 573
Assets Measured at NAV |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 0 | 0
Equity Securities [Abstract] |  |
Mutual/Collective Trust Funds - U.S. | 1,174 | 1,214
Mutual/Collective Trust Funds - International | 387 | 396
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 60,891 | 68,439
Total | 62,452 | 70,049
Assets Measured at NAV | Defined Benefit Plan, Equity Securities, Common Stock, Employer, Related Party |  |
Equity Securities [Abstract] |  |
Company stock | $ 0 | $ 0

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