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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 24, 2017 | Apr. 28, 2018 | Aug. 03, 2019 | Jul. 28, 2018 | Jul. 29, 2017 | Oct. 06, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Decrease in accounts payable |  | $ 20,900,000 | $ (40,149,000) | $ 3,961,000 | $ 82,772,000 |
Inventory, LIFO reserve, increase to net income |  |  |  | $ 13,900,000 |  |
Change in accounting estimate, increase to per diluted share (in dollars per share) |  |  |  | $ 0.27 |  |
Inventory write-down |  |  | 15,000,000 |  |  |
Decrease to cash used in operating activities |  |  | $ 284,530,000 | $ 109,038,000 | 273,331,000 |
Original maturities of highly liquid investments |  |  | 3 months |  |  |
Bank overdrafts |  |  | $ 236,900,000 | $ 115,800,000 |  |
LIFO inventory amount |  |  | $ 1,600,000,000 |  |  |
Gain on investment | $ 6,100,000 |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 200,000,000
Repurchase of common stock (in shares) |  |  | 0 | 614,660 |  |
Repurchase of common stock |  |  |  | $ 24,231,000 |  |
Present value of claims, discount rate |  |  | 1.90% |  |  |
Insurance liabilities |  |  | $ 6,600,000 | 1,300,000 |  |
Due from insurance companies |  |  | 11,100,000 |  |  |
Continuing Operations |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
New accounting pronouncement or change in accounting principle, increase to net loss from continuing operations |  |  | $ 11,000,000 |  |  |
Change in accounting policy, increase to diluted earnings per share (in dollars per share) |  |  | $ 0.21 |  |  |
Change in Accounting for Book Overdrafts |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Decrease to cash used in operating activities |  |  |  | 400,000 | 7,400,000 |
Goodwill and Asset Impairment Charges |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassifications |  |  | $ 11,200,000 |  |  |
Restructuring, Acquisition and Integration Related Expenses |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassifications |  |  | $ 5,000,000 |  |  |
Closed Property Lease Liability | Minimum |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Closed property lease liabilities, term of contract |  |  | 1 year |  |  |
Closed Property Lease Liability | Maximum |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Closed property lease liabilities, term of contract |  |  | 12 years |  |  |
SUPERVALU |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Present value of claims, discount rate |  |  | 3.00% |  |  |
Other Long-Term Liabilities |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassifications |  |  | $ 7,400,000 |  |  |
Shipping and Handling |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Shipping, handling and transportation costs |  |  | $ 1,298,900,000 | $ 582,900,000 | $ 517,200,000 |

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