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)