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BASIS OF PRESENTATION and ACCOUNTING POLICIES - Disaggregated Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended
Oct. 30, 2021
Oct. 24, 2020
Revenue from External Customer [Line Items]    
Sales $ 494,211 $ 490,136
Percentage of total sales 100.00% 100.00%
Center Store    
Revenue from External Customer [Line Items]    
Sales $ 295,974 $ 295,940
Percentage of total sales 59.90% 60.40%
Fresh    
Revenue from External Customer [Line Items]    
Sales $ 179,823 $ 175,644
Percentage of total sales 36.40% 35.80%
Pharmacy    
Revenue from External Customer [Line Items]    
Sales $ 16,848 $ 16,432
Percentage of total sales 3.40% 3.40%
Other    
Revenue from External Customer [Line Items]    
Sales $ 1,566 $ 2,120
Percentage of total sales 0.30% 0.40%