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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Aug. 01, 2020 | Aug. 03, 2019 | Jul. 28, 2018 | Oct. 06, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Shipping and Handling Fees and Costs | $ 3,541,487,000 | $ 2,967,912,000 | $ 1,274,562,000 |
Loss (gain) on sale of assets | 17,132,000 | (499,000) | 0 |
Decrease in accounts payable |  |  | 20,900,000 |
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 |  | 15,000,000.0 |  |
Net book overdrafts | 267,800,000 | 236,900,000 |  |
LIFO inventory amount | $ 1,800,000,000 | 1,600,000,000 |  |
Stock repurchase program, authorized amount |  |  |  | $ 200,000,000.0
Repurchase of common stock (in shares) | 0 |  | 614,660 |
Repurchase of common stock |  |  | $ 24,231,000 |
Insurance liability discounts | $ 6,500,000 | 6,600,000 |  |
Due from insurance companies | $ 12,100,000 | 11,100,000 |  |
Continuing Operations |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Change in Accounting Estimate, effect on net income |  | $ (11,000,000.0) |  |
Change in accounting policy, increase to diluted earnings per share (in dollars per share) |  | $ 0.21 |  |
Minimum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Present value of claims, discount rate | 0.40% |  |  |
Lessee, operating lease, remaining lease term | 1 year |  |  |
Maximum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Present value of claims, discount rate | 2.00% |  |  |
Lessee, operating lease, remaining lease term | 12 years |  |  |
Loss (gain) on sale of assets |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loss (gain) on sale of assets | $ (50,000,000.0) |  |  |
Accrued expenses and other current liabilities |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Self Insurance Reserve, Current | (34,300,000) | $ (32,700,000) |  |
Other Long-Term Liabilities |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Self Insurance Reserve, Noncurrent | 66,500,000 | 56,100,000 |  |
Shipping and Handling |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Shipping and Handling Fees and Costs | 1,505,100,000 | $ 1,298,900,000 | $ 582,900,000 |
Property, Plant and Equipment | Loss (gain) on sale of assets |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loss (gain) on sale of assets | (38,800,000) |  |  |
Finite-Lived Intangible Assets | Loss (gain) on sale of assets |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Loss (gain) on sale of assets | $ (11,200,000) |  |  |

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