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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 3 Months Ended 6 Months Ended
Sep. 08, 2012
Store
Sep. 08, 2012
Store
Jul. 17, 2012
Feb. 25, 2012
Sep. 08, 2012
Common Stock [Member]
Sep. 08, 2012
Capital in Excess of Par Value [Member]
Jul. 17, 2012
Amended And Restated [Member]
Sep. 10, 2011
Options And Restricted Stock [Member]
Sep. 08, 2012
Options And Restricted Stock [Member]
Sep. 08, 2012
Options And Restricted Stock [Member]
Sep. 10, 2011
Options And Restricted Stock [Member]
Significant Accounting Policies [Line Items]                      
Number of weeks in first quarter   16 weeks                  
Number of weeks in second, third and fourth quarter   12 weeks                  
Net book overdrafts $ 235 $ 235   $ 268              
Percentage of inventory valued under LIFO 78.00% 78.00%   78.00%              
Percentage of LIFO inventory valued under replacement cost method 41.00% 41.00%   42.00%              
Percentage of LIFO inventory valued under retail inventory method and weighted average 37.00% 37.00%   36.00%              
Percentage of FIFO inventory valued under cost, weighted average cost and retail inventory method 18.00% 18.00%   18.00%              
Percentage of FIFO inventory valued under replacement cost method 4.00% 4.00%   4.00%              
Underperforming or non-strategic stores 60 60                  
Impairment of long-lived assets related to store closures 35                    
Pre-tax non-cash impairment charge related to long-lived assets 24                    
Antidilutive Securities Excluded from Computation of Earnings Per Share               20 24 19 21
Common stock par value $ 0.01 $ 0.01 $ 1.00 $ 1.00     $ 0.01        
Capital in excess of par value         $ 228 $ 228