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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
3 Months Ended 8 Months Ended
May 12, 2019
USD ($)
warehouse
states
May 13, 2018
USD ($)
May 12, 2019
USD ($)
warehouse
states
May 13, 2018
USD ($)
Sep. 01, 2019
USD ($)
Sep. 02, 2018
USD ($)
Summary Of Significant Accounting Policies [Line Items]            
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets $ 16   $ 16      
Number of warehouses operated | warehouse 772   772      
Number of states in country | states 44   44      
Total Revenue $ 34,740 $ 32,361 $ 105,205 $ 97,165    
Reduction In Sales 346 316 1,060 962    
Revenue Recognition, Sales Returns, Reserve for Sales Returns 694   694     $ 649
Merchandise costs 30,233 28,131 91,576 84,481    
Gross Margin (1) 3,731   11,327      
Membership fees            
Summary Of Significant Accounting Policies [Line Items]            
Total Revenue 776 737 2,302 2,145    
Deferred Revenue, Current     1,451      
Net Sales            
Summary Of Significant Accounting Policies [Line Items]            
Total Revenue 33,964 $ 31,624 102,903 $ 95,020    
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Merchandise costs 342   856      
Gross Margin (1) 4   9      
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Net Sales            
Summary Of Significant Accounting Policies [Line Items]            
Total Revenue 346   865      
Calculated under Revenue Guidance in Effect before Topic 606 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Merchandise costs 29,891   90,720      
Gross Margin (1) 3,727   11,318      
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Net Sales            
Summary Of Significant Accounting Policies [Line Items]            
Total Revenue $ 33,618   $ 102,038      
UNITED STATES            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 535   535      
CANADA            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 100   100      
MEXICO            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 39   39      
UNITED KINGDOM            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 28   28      
JAPAN            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 26   26      
KOREA            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 16   16      
TAIWAN            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 13   13      
AUSTRALIA            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 11   11      
SPAIN            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 2   2      
ICELAND            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 1   1      
FRANCE            
Summary Of Significant Accounting Policies [Line Items]            
Number of warehouses operated | warehouse 1   1      
Scenario, Forecast [Member] | Maximum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Operating Lease, Right-of-Use Asset         $ 3,000  
Scenario, Forecast [Member] | Minimum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Operating Lease, Right-of-Use Asset         $ 2,500