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PENSION PLANS - Fair Value of Pension Assets (Details) - USD ($) $ in Thousands | Jul. 25, 2020 | Jul. 27, 2019
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | $ 61 | $ 37
Equity Securities [Abstract] |  |
Company stock | 573 | 568
Mutual/Collective Trust Funds - U.S. | 1,214 | 4,401
Mutual/Collective Trust Funds - International | 396 | 2,613
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 68,439 | 57,554
Total | 70,683 | 65,173
Level 1 |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 61 | 37
Equity Securities [Abstract] |  |
Company stock | 573 | 568
Mutual/Collective Trust Funds - U.S. |  | 0
Mutual/Collective Trust Funds - International | 0 | 0
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 0 | 0
Total | 634 | 605
Assets Measured at NAV |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Cash | 0 | 0
Equity Securities [Abstract] |  |
Company stock | 0 | 0
Mutual/Collective Trust Funds - U.S. | 1,214 | 4,401
Mutual/Collective Trust Funds - International | 396 | 2,613
Fixed Income Securities [Abstract] |  |
Mutual/Collective Trust Funds - Fixed Income | 68,439 | 57,554
Total | $ 70,049 | $ 64,568

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