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Acquisition of Inotera (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Dec. 06, 2016
Dec. 05, 2016
Aug. 29, 2019
Aug. 30, 2018
Aug. 31, 2017
Sep. 01, 2016
Acquisition of Inotera            
Gain on remeasurement of previously-held equity interest in Inotera     $ 0 $ 0 $ 71  
Consideration            
Payments attributed to intercompany balances with Inotera     0 0 361  
Assets acquired and liabilities assumed            
Goodwill     1,228 1,228    
Unaudited Pro Forma Financial Information            
Net sales         20,317  
Net Income         5,172  
Net income attributable to Micron         $ 5,171  
Earnings per share, basic (in dollars per share)         $ 4.68  
Earnings per share, diluted (in dollars per share)         $ 4.42  
CNBU            
Assets acquired and liabilities assumed            
Goodwill     832 832    
MBU            
Assets acquired and liabilities assumed            
Goodwill     198 198    
EBU            
Assets acquired and liabilities assumed            
Goodwill     $ 97 $ 97    
Inotera | Nanya and certain of its affiliates            
Acquisition of Inotera            
Percentage interest in Inotera held by Nanya immediately prior to acquisition (in hundredths)   32.00%        
Inotera            
Acquisition of Inotera            
Ownership interest in Inotera immediately prior to acquisition (in hundredths)   33.00%        
Percentage of Inotera voting interests acquired (in hundredths) 67.00%          
Transaction costs incurred in connection with acquisition of Inotera         $ 13 $ 3
Gain on remeasurement of previously-held equity interest in Inotera         $ 71  
Micron Shares            
Proceeds from issuance of stock to Nanya $ 986          
Consideration            
Cash paid for Inotera Acquisition 4,099          
Less cash received from selling Micron Shares (986)          
Net cash paid for Inotera Acquisition 3,113          
Fair value of our previously-held equity interest in Inotera 1,441          
Fair value of Micron Shares exchanged for Inotera shares 995          
Other 3          
Payments attributed to intercompany balances with Inotera (361)          
Total fair value of consideration for Inotera including previously held equity interests 5,191          
Assets acquired and liabilities assumed            
Cash and equivalents 118          
Inventories 285          
Other current assets 27          
Property, plant, and equipment 3,722          
Deferred tax assets 82          
Goodwill 1,124          
Other noncurrent assets 130          
Accounts payable and accrued expenses (232)          
Debt (56)          
Other noncurrent liabilities (9)          
Total assets acquired and liabilities assumed, including goodwill 5,191          
Inotera | CNBU            
Assets acquired and liabilities assumed            
Goodwill 829          
Inotera | MBU            
Assets acquired and liabilities assumed            
Goodwill 198          
Inotera | EBU            
Assets acquired and liabilities assumed            
Goodwill $ 97          
Inotera | Shares Issued to Nanya            
Micron Shares            
Number of Micron Shares issued to Nanya as consideration for Inotera shares not already owned (in shares) 58          
Proceeds from issuance of stock to Nanya $ 986          
Discount for lack of transferability on Micron Shares issued to Nanya 81          
Consideration            
Less cash received from selling Micron Shares $ (986)          
Inotera            
Acquisition of Inotera            
Pre-acquisition purchases of DRAM products from Inotera   $ 504