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Equity - Treasury Stock (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 06, 2016
Aug. 31, 2017
Treasury Stock    
Class of Stock [Line Items]    
Decrease in retained earnings (decrease in treasury stock) due to reissuance of treasury shares at price lower than purchase price   $ (1,029)
Retained Earnings    
Class of Stock [Line Items]    
Decrease in retained earnings (decrease in treasury stock) due to reissuance of treasury shares at price lower than purchase price   $ 104
Inotera    
Class of Stock [Line Items]    
Proceeds from issuance of stock to Nanya $ 986  
Inotera | Shares Issued to Nanya    
Class of Stock [Line Items]    
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  
Inotera | Shares Issued to Nanya | Treasury Stock    
Class of Stock [Line Items]    
Proceeds from issuance of stock to Nanya $ 925  
Treasury shares included in sale of shares to Nanya (in shares) 54  
Decrease in retained earnings (decrease in treasury stock) due to reissuance of treasury shares at price lower than purchase price $ (1,030)  
Inotera | Shares Issued to Nanya | Retained Earnings    
Class of Stock [Line Items]    
Decrease in retained earnings (decrease in treasury stock) due to reissuance of treasury shares at price lower than purchase price $ 104