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BUSINESS ACQUISITIONS - Additional Information (Details)
12 Months Ended
Dec. 08, 2017
USD ($)
Jun. 23, 2017
USD ($)
Feb. 24, 2018
USD ($)
Store
Feb. 25, 2017
USD ($)
Feb. 27, 2016
USD ($)
Store
Business Acquisition [Line Items]          
Cash payment related to acquisition     $ 240,000,000 $ 1,000,000 $ 7,000,000
Associated Grocers of Florida, Inc.          
Business Acquisition [Line Items]          
Total payment related to acquisition $ 193,000,000        
Cash payment related to acquisition $ 131,000,000        
Percentage of voting interests acquired (as a percentage) 100.00%        
Assumption of debt $ 62,000,000        
Merger and integration costs $ 5,000,000        
Unified          
Business Acquisition [Line Items]          
Total payment related to acquisition   $ 390,000,000      
Cash payment related to acquisition   $ 114,000,000      
Percentage of voting interests acquired (as a percentage)   100.00%      
Assumption of debt   $ 276,000,000      
Merger and integration costs   $ 32,000,000      
Cub Foods Stores          
Business Acquisition [Line Items]          
Payments to acquire minority equity interests     $ 6    
Number of businesses acquired | Store     6    
Series of Individually Immaterial Business Acquisitions          
Business Acquisition [Line Items]          
Payments to acquire productive assets         $ 7,000,000
Number of businesses acquired | Store         4
Joliet, IL | Distribution Center          
Business Acquisition [Line Items]          
Payments to acquire productive assets     $ 61    
Harrisburg, PA | Distribution Center          
Business Acquisition [Line Items]          
Payments to acquire productive assets     $ 37