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Acquisition of Inotera (Details) shares in Millions, $ in Millions, TWD in Billions |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 06, 2016 USD ($) payment | Dec. 06, 2016 TWD | Dec. 31, 2016 USD ($) shares | Dec. 06, 2016 TWD payment | Dec. 01, 2016 | Sep. 01, 2016
Subsequent Event | Inotera |  |  |  |  |  |
Acquisition of Inotera [Abstract] |  |  |  |  |  |
Percentage of Inotera voting interests acquired | 67.00% |  |  | 67.00% |  |
Aggregate consideration for Inotera shares not already owned | $ 4,100 |  |  |  |  |
Subsequent Event | Inotera | Private Placement |  |  |  |  |  |
Equity [Abstract] |  |  |  |  |  |
Number of Micron Shares issued to Nanya as consideration for Inotera shares not already owned (in shares) | shares |  |  | 58 |  |  |
Value of Micron Shares issued to Nanya as consideration for Inotera shares not already owned |  |  | $ 981 |  |  |
Treasury shares included in sale of Micron Shares to Nanya | shares |  |  | 54 |  |  |
Subsequent Event | Inotera | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
2021 Term Loan draw | $ 2,500 | TWD 80.0 |  |  |  |
Debt instrument, original term | 5 years | 5 years |  |  |  |
Debt instruments number of periodic payments | payment | 6 |  |  | 6 |  |
Debt Instrument, Covenant Compliance, Penalty Interest Percent | 0.25% |  |  | 0.25% |  |
Subsequent Event | Inotera | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. | Inotera Stock |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Percentage of post-acquisition Inotera shares subject to collateralization | 82.00% | 82.00% |  |  |  |
Subsequent Event | Inotera | TAIBOR | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Margin on variable rate financing | 2.05% | 2.05% |  |  |  |
Subsequent Event | Inotera | Maximum | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument Variable Reference Rate Period 1 | 6 months | 6 months |  |  |  |
Subsequent Event | Inotera | Maximum | Debt Covenant Period 2017_2018 | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 5.5 |  |  | 5.5 |  |
Subsequent Event | Inotera | Maximum | Debt Covenant Period 2019_2021 | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 4.5 |  |  | 4.5 |  |
Subsequent Event | Inotera | Maximum | Debt Covenant Period 2018_2019 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 3.0 |  |  | 3.0 |  |
Subsequent Event | Inotera | Maximum | Debt Covenant Period 2020_2021 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 2.5 |  |  | 2.5 |  |
Subsequent Event | Inotera | Maximum | Debt Covenant Period 2017 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 3.5 |  |  | 3.5 |  |
Subsequent Event | Inotera | Minimum | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument Variable Reference Rate Period 1 | 3 months | 3 months |  |  |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2017_2018 | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | $ 125 |  |  | TWD 4.0 |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2019_2020 | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | 203 |  |  | 6.5 |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2018_2019 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | 12,500 |  |  |  |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2020_2021 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | 16,500 |  |  |  |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2017 | 2021 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | 9,000 |  |  |  |  |
Subsequent Event | Inotera | Minimum | Debt Covenant Period 2021 | 2021 Secured Notes NTD Term Loan | Secured Debt | Micron Semiconductor Taiwan Co. Ltd. |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible net worth | $ 374 |  |  | TWD 12.0 |  |
Inotera |  |  |  |  |  |
Acquisition of Inotera [Abstract] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage (in hundredths) |  |  |  |  | 33.00% | 33.00%
Inotera | Nanya and certain of its affiliates |  |  |  |  |  |
Acquisition of Inotera [Abstract] |  |  |  |  |  |
Percentage interest held by a third party (in hundredths) |  |  |  |  | 32.00% |

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