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Proposed Acquisition of Inotera (Details) TWD / shares in Units, $ / shares in Units, $ in Millions, TWD in Billions | 2 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 06, 2016 USD ($) payment $ / shares | Dec. 06, 2016 USD ($) payment $ / shares | Dec. 06, 2016 TWD | Dec. 06, 2016 TWD payment TWD / shares | Sep. 01, 2016 TWD / $ | Sep. 03, 2015
Inotera |  |  |  |  |  |
Proposed Acquisition of Inotera [Abstract] |  |  |  |  |  |
Current Equity Ownership Percentage (in hundredths) |  |  |  |  | 33.00% | 33.00%
Percentage interest held by a third party (in hundredths) |  |  |  |  | 67.00% |
Inotera | Nanya and certain of its affiliates |  |  |  |  |  |
Proposed Acquisition of Inotera [Abstract] |  |  |  |  |  |
Percentage interest held by a third party (in hundredths) |  |  |  |  | 32.00% |
Inotera |  |  |  |  |  |
Proposed Acquisition of Inotera [Abstract] |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation | TWD / $ |  |  |  |  | 31.7 |
Inotera | Scenario, Forecast |  |  |  |  |  |
Proposed Acquisition of Inotera [Abstract] |  |  |  |  |  |
Inotera Acquisition, Share Price | (per share) | $ 0.95 | $ 0.95 |  | TWD 30 |  |
Proposed Acquisition of Inotera, Acquisition Financing [Abstract] |  |  |  |  |  |
Aggregate consideration payable for Inotera shares not already owned |  | $ 4,100 |  |  |  |
Inotera | Scenario, Forecast | Private Placement |  |  |  |  |  |
Micron Shares |  |  |  |  |  |
Trading-day period used to derive average share value of equity interests issuable to Nanya |  | 30 days | 30 days |  |  |
Number of days prior to the optional share issuance to Nanya that pricing is established |  | 30 days | 30 days |  |  |
Inotera | Scenario, Forecast | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt instrument, original term | 5 years |  |  |  |  |
Debt instruments number of periodic payments | payment | 6 | 6 |  | 6 |  |
Period between draw and initial payment on term loan | 30 months |  |  |  |  |
Debt Instrument, Covenant Compliance, Penalty Interest Percent | 0.25% | 0.25% |  | 0.25% |  |
Inotera | Scenario, Forecast | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW | Inotera Stock |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Percentage of post-acquisition MTTW shares subject to collateralization | 80.00% |  |  |  |  |
Inotera | Scenario, Forecast | 2021 Convertible Notes | Convertible Notes |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |
Stated interest rate on potential convertible debt issuable to Nanya | 2.00% | 2.00% |  | 2.00% |  |
Inotera | Scenario, Forecast | TAIBOR | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Margin on variable rate financing | 2.05% |  |  |  |  |
Inotera | Scenario, Forecast | Maximum | Private Placement |  |  |  |  |  |
Micron Shares |  |  |  |  |  |
Value of equity interests issuable to Nanya at our option as consideration for Inotera shares not already owned |  | $ 991 | TWD 31.5 |  |  |
Inotera | Scenario, Forecast | Maximum | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Unused borrowing capacity on term loan | $ 2,500 | 2,500 |  | TWD 80.0 |  |
Debt Instrument Variable Reference Rate Period 1 | 6 months |  |  |  |  |
Inotera | Scenario, Forecast | Maximum | 2021 Convertible Notes | Convertible Notes |  |  |  |  |  |
Convertible Debt [Abstract] |  |  |  |  |  |
Value of convertible debt available to be issued to Nanya in lieu of equity |  | $ 396 | 12.6 |  |  |
Inotera | Scenario, Forecast | Maximum | Debt Covenant Period 2017_2018 | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 5.50 | 5.50 |  | 5.50 |  |
Inotera | Scenario, Forecast | Maximum | Debt Covenant Period 2019_2021 | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 4.50 | 4.50 |  | 4.50 |  |
Inotera | Scenario, Forecast | Maximum | Debt Covenant Period 2018_2019 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 3.00 | 3.00 |  | 3.00 |  |
Inotera | Scenario, Forecast | Maximum | Debt Covenant Period 2020_2021 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 2.50 | 2.50 |  | 2.50 |  |
Inotera | Scenario, Forecast | Maximum | Debt Covenant Period 2017 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Ratio Of Total Debt To EBITDA | 3.50 | 3.50 |  | 3.50 |  |
Inotera | Scenario, Forecast | Minimum | Private Placement |  |  |  |  |  |
Micron Shares |  |  |  |  |  |
Value of equity interests issuable to Nanya at our option as consideration for Inotera shares not already owned |  | $ 198 | TWD 6.3 |  |  |
Minimum price per share of equity interests issuable to Nanya | $ / shares |  | $ 10.00 |  |  |  |
Inotera | Scenario, Forecast | Minimum | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument Variable Reference Rate Period 1 | 3 months |  |  |  |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2017_2018 | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | $ 126 | $ 126 |  | TWD 4.0 |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2019_2020 | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | 205 | 205 |  | 6.5 |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2018_2019 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | 12,500 | 12,500 |  |  |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2020_2021 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | 16,500 | 16,500 |  |  |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2017 | 2022 Secured Notes NTD Term Loan | Secured Debt |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | 9,000 | 9,000 |  |  |  |
Inotera | Scenario, Forecast | Minimum | Debt Covenant Period 2021 | 2022 Secured Notes NTD Term Loan | Secured Debt | MSTW |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |
Debt Instrument, Covenant, Tangible Net Worth | $ 378 | $ 378 |  | TWD 12.0 |  |

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