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Equity - Treasury Stock (Details) - USD ($) shares in Millions, $ in Millions |  | 12 Months Ended
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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

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