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Recently Adopted Accounting Standards Revenue Initial Application Period Cumulative Effect (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Feb. 28, 2019
Mar. 01, 2018
Feb. 28, 2019
Mar. 01, 2018
Aug. 31, 2018
Aug. 30, 2018
Income Statement [Abstract]            
Revenue $ 5,835 $ 7,351 $ 13,748 $ 14,154    
Cost of goods sold 2,971 3,081 6,269 6,137    
Interest expense (27) (88) (60) (212)    
Income tax provision (280) (143) (757) (257)    
Net income attributable to Micron 1,619 $ 3,309 4,912 $ 5,987    
Balance Sheet [Abstract]            
Receivables 4,416   4,416   $ 5,592 $ 5,478
Other current assets 211   211   180 164
Deferred tax assets 762   762   986 1,022
Accounts payable and accrued expenses 4,062   4,062     4,374
Other current liabilities 665   665   517 521
Other noncurrent liabilities 993   993   582 581
Retained earnings 29,364   29,364   24,487 $ 24,395
ASC 606            
Balance Sheet [Abstract]            
Receivables         114  
Other current assets         30  
Deferred tax assets         (92)  
Other current liabilities         (4)  
Other noncurrent liabilities         1  
Retained earnings         $ 50  
Difference between Revenue Guidance in Effect before and after Topic 606 | ASC 606            
Income Statement [Abstract]            
Revenue 20   115      
Cost of goods sold 28   69      
Interest expense (1)   (3)      
Income tax provision 8   5      
Net income attributable to Micron (1)   48      
Balance Sheet [Abstract]            
Receivables 154   154      
Other current assets 39   39      
Deferred tax assets (87)   (87)      
Accounts payable and accrued expenses 0   0      
Other current liabilities 7   7      
Other noncurrent liabilities 1   1      
Retained earnings 98   98      
Calculated under Revenue Guidance in Effect before Topic 606 | ASC 606            
Income Statement [Abstract]            
Revenue 5,815   13,633      
Cost of goods sold 2,943   6,200      
Interest expense (26)   (57)      
Income tax provision (288)   (762)      
Net income attributable to Micron 1,620   4,864      
Balance Sheet [Abstract]            
Receivables 4,262   4,262      
Other current assets 172   172      
Deferred tax assets 849   849      
Accounts payable and accrued expenses 4,062   4,062      
Other current liabilities 658   658      
Other noncurrent liabilities 992   992      
Retained earnings $ 29,266   $ 29,266