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SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets With Definite Lives (Details)
12 Months Ended
Aug. 03, 2019
Customer relationships | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 7 years
Customer relationships | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 20 years
Non-compete agreement | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 1 year
Non-compete agreement | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 10 years
Trademarks and tradenames | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 2 years
Trademarks and tradenames | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 10 years
Leases in place | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 1 year
Leases in place | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 9 years
Favorable operating leases | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 2 years
Favorable operating leases | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 25 years
Unfavorable operating leases | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 2 years
Unfavorable operating leases | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 25 years
Pharmacy prescription files | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 5 years
Pharmacy prescription files | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Finite-lived intangible asset, useful life 7 years