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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
3 Months Ended
Nov. 25, 2018
USD ($)
warehouse
Nov. 26, 2017
USD ($)
Sep. 02, 2018
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 768    
Total Revenue $ 35,069 $ 31,809  
Deferred Revenue, Revenue Recognized 662    
Deferred Revenue, Current 1,695   $ 1,624
Reduction In Sales 350 317  
Revenue Recognition, Sales Returns, Reserve for Sales Returns 692   $ 649
Merchandise costs 30,623 27,617  
Gross Margin (1) 3,688    
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets 16    
Membership fees      
Summary Of Significant Accounting Policies [Line Items]      
Total Revenue 758 692  
Net sales      
Summary Of Significant Accounting Policies [Line Items]      
Total Revenue 34,311 $ 31,117  
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Merchandise costs 331    
Gross Margin (1) 9    
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Net sales      
Summary Of Significant Accounting Policies [Line Items]      
Total Revenue 340    
Calculated under Revenue Guidance in Effect before Topic 606 [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Merchandise costs 30,292    
Gross Margin (1) 3,679    
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Net sales      
Summary Of Significant Accounting Policies [Line Items]      
Total Revenue $ 33,971    
UNITED STATES      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 533    
CANADA      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 100    
MEXICO      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 39    
UNITED KINGDOM      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 28    
JAPAN      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 26    
KOREA      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 15    
TAIWAN      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 13    
AUSTRALIA      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 10    
SPAIN      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 2    
ICELAND      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 1    
FRANCE      
Summary Of Significant Accounting Policies [Line Items]      
Number of warehouses operated | warehouse 1