v2.4.1.9

Debt - Schedule of Long-term Debt (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 05, 2015 | Mar. 05, 2015 | Feb. 12, 2015 | Dec. 02, 2014 | Aug. 28, 2014 | Feb. 03, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | $ 1,199,000,000us-gaap_DebtCurrent |  | $ 1,199,000,000us-gaap_DebtCurrent |  |  |  | $ 1,638,000,000us-gaap_DebtCurrent |  |
Long-term debt | 5,519,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations |  | 5,519,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations |  |  |  | 4,955,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations |  |
Debt | 6,718,000,000us-gaap_DebtAndCapitalLeaseObligations |  | 6,718,000,000us-gaap_DebtAndCapitalLeaseObligations |  |  |  | 6,593,000,000us-gaap_DebtAndCapitalLeaseObligations |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Share Price (in dollars per share) | $ 29.28us-gaap_SharePrice |  | $ 29.28us-gaap_SharePrice |  |  |  |  |  |
Capital lease obligations [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 369,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] | 369,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |  |  | 323,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |
Long-term debt | 576,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] | 576,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |  |  | 588,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |
Debt | 945,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] | 945,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |  |  | 911,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember | [1] |
Effective interest rate (in hundredths) | 3.90%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 3.90%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  | 4.30%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |
Capital Lease Obligations [Abstract] |  |  |  |  |  |  |  |  |
Capital Lease Obligations Incurred | 287,000,000us-gaap_CapitalLeaseObligationsIncurred / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage, Incurred in Current Period | 3.20%mu_DebtInstrumentInterestRateEffectivePercentageIncurredinCurrentPeriod / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount | (77,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | (77,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |  |
Remainder of 2015 | 202,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 202,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
2016 | 340,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 340,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
2017 | 164,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 164,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
2018 | 122,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 122,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
2019 | 85,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 85,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
2020 and thereafter | 109,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 109,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
Debt Instrument, Unamortized Discount | (77,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | (77,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
Capital Lease Obligations | 945,000,000us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  | 945,000,000us-gaap_CapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |
Capital lease obligations [Member] | Sales leaseback transactions [Member] |  |  |  |  |  |  |  |  |
Capital Lease Obligations [Abstract] |  |  |  |  |  |  |  |  |
Capital Lease Obligations Incurred | 254,000,000us-gaap_CapitalLeaseObligationsIncurred / us-gaap_DebtInstrumentAxis = mu_SalesLeasebackTransactionsMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CapitalLeaseObligationsMember |  |  |  |  |  |  |  |
Reorganization obligation [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 157,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  | 157,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |  |  | 192,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |
Long-term debt | 684,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  | 684,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |  |  | 939,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |
Debt | 841,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  | 841,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |  |  | 1,131,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |
Effective interest rate (in hundredths) | 6.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  | 6.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = mu_ReorganizationobligationMember |  |  |  |  |  |
Secured Debt [Member] | 2019 senior notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 92,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 92,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  | 92,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Long-term debt | 278,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 278,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  | 324,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Debt | 370,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 370,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  | 416,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |
Stated interest rate (in hundredths) | 1.258%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 1.258%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 1.97%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 1.97%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_SecuredDebt4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |  |  |
Corporate bonds [Member] | 2022 senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Long-term debt | 600,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 600,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 600,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Debt | 600,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 600,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 600,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Stated interest rate (in hundredths) | 5.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 5.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 6.14%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 6.14%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2022Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Corporate bonds [Member] | 2023 senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Long-term debt | 1,000,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 1,000,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Debt | 1,000,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 1,000,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 0us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Stated interest rate (in hundredths) | 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 5.43%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 5.43%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Unsecured Debt [Abstract] |  |  |  |  |  |  |  |  |
Face Value of Debt |  |  |  |  |  |  |  |  | 1,000,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember
Payments of Debt Issuance Costs |  |  | 12,000,000us-gaap_PaymentsOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Debt Instrument, Domestic Restricted Subsidiaries, Ownership Percentage by Parent | 80.00%mu_DebtInstrumentDomesticRestrictedSubsidiariesOwnershipPercentagebyParent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 80.00%mu_DebtInstrumentDomesticRestrictedSubsidiariesOwnershipPercentagebyParent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 105.25%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Corporate bonds [Member] | 2023 senior notes [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Redemption Price Percentage of Principal Amount Redeemable Using Equity Offering Proceeds |  |  | 35.00%mu_DebtInstrumentRedemptionPricePercentageofPrincipalAmountRedeemableUsingEquityOfferingProceeds / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Corporate bonds [Member] | 2025 senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Long-term debt | 1,150,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 1,150,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 1,150,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Debt | 1,150,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 1,150,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  | 1,150,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |
Stated interest rate (in hundredths) | 5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 5.56%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  | 5.56%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2025Member / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |  |  |  |  |  |
Convertible Debt [Member] |  |  |  |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Outstanding Principal | 2,289,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 2,289,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Underlying Shares (in shares) | 157mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 157mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion value in excess of principal |  |  | 2,334,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion rights, minimum number of trading days (in days) |  |  | 20us-gaap_DebtInstrumentConvertibleThresholdTradingDays / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion rights, consecutive trading period (in days) |  |  | 30 days |  |  |  |  |  |
Conversion rights, threshold percentage of applicable conversion price (in hundredths) |  |  | 130.00%us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt [Member] | 2031B convertible senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  | 362,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |
Debt | 0us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 0us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  | 362,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |
Stated interest rate (in hundredths) | 1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 6.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 6.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt [Member] | 2032C convertible senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Long-term debt | 314,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 314,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 314,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Debt | 314,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 314,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 314,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Stated interest rate (in hundredths) | 2.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 2.375%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 5.95%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 5.95%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Put Date Earliest |  |  | May 31, 2019 | [4] |  |  |  |  |
Outstanding Principal | 357,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 357,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Underlying Shares (in shares) | 37mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 37mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share (in dollars per share) | $ 9.63us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | $ 9.63us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share threshold (in dollars per share) |  |  | $ 12.52us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [5] |  |  |  |  |
Conversion value in excess of principal |  |  | 730,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [6] |  |  |  |  |
Convertible Debt [Member] | 2032D convertible senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Long-term debt | 265,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 265,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 288,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Debt | 265,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 265,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 288,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Stated interest rate (in hundredths) | 3.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 3.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 6.33%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 6.33%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Put Date Earliest |  |  | May 31, 2021 | [4] |  |  |  |  |
Outstanding Principal | 313,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 313,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Underlying Shares (in shares) | 31mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 31mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share (in dollars per share) | $ 9.98us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | $ 9.98us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share threshold (in dollars per share) |  |  | $ 12.97us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [5] |  |  |  |  |
Conversion value in excess of principal |  |  | 604,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [6] |  |  |  |  |
Convertible Debt [Member] | 2033E convertible senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 275,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 275,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 278,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Debt | 275,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 275,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 278,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Stated interest rate (in hundredths) | 1.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 1.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 4.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 4.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Put Date Earliest |  |  | Feb. 28, 2018 | [4] |  |  |  |  |
Outstanding Principal | 294,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 294,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Underlying Shares (in shares) | 27mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 27mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share (in dollars per share) | $ 10.93us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | $ 10.93us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share threshold (in dollars per share) |  |  | $ 14.21us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [5] |  |  |  |  |
Conversion value in excess of principal |  |  | 492,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [6] |  |  |  |  |
Convertible Debt [Member] | 2033F convertible senior note [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 268,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 268,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 265,000,000us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Long-term debt | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 0us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Debt | 268,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] | 268,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2],[3] |  |  | 265,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Stated interest rate (in hundredths) | 2.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 2.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 4.93%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 4.93%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Put Date Earliest |  |  | Feb. 28, 2020 | [4] |  |  |  |  |
Outstanding Principal | 300,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 300,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Underlying Shares (in shares) | 27mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 27mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share (in dollars per share) | $ 10.93us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | $ 10.93us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share threshold (in dollars per share) |  |  | $ 14.21us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [5] |  |  |  |  |
Conversion value in excess of principal |  |  | 504,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2033FMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [6] |  |  |  |  |
Convertible Debt [Member] | 2043G convertible senior notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |  |  | 0us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Long-term debt | 642,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] | 642,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |  |  | 636,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Debt | 642,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] | 642,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |  |  | 636,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [2] |
Stated interest rate (in hundredths) | 3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 6.76%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 6.76%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Convertible Debt Issuances [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument Put Date Earliest |  |  | Nov. 30, 2028 | [4],[7] |  |  |  |  |
Outstanding Principal | 1,025,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [7] | 1,025,000,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [7] |  |  |  |  |
Underlying Shares (in shares) | 35mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 35mu_DebtInstrumentConvertibleUnderlyingShares / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share (in dollars per share) | $ 29.16us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | $ 29.16us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion price per share threshold (in dollars per share) |  |  | $ 37.91us-gaap_DebtInstrumentConvertibleStockPriceTrigger / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Conversion value in excess of principal |  |  | 4,000,000us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember | [6] |  |  |  |  |
Debt Instrument Issued At A Discount, Original Principal Amount | 820,000,000mu_DebtInstrumentIssuedAtADiscountOriginalPrincipalAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 820,000,000mu_DebtInstrumentIssuedAtADiscountOriginalPrincipalAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Debt Instrument, Scheduled Accreted Principal Amount | 917,000,000mu_DebtInstrumentScheduledAccretedPrincipalAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  | 917,000,000mu_DebtInstrumentScheduledAccretedPrincipalAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNoteDue2043GMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |  |  |  |  |  |
Notes Payable, Other Payables [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Current debt | 38,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 38,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  | 126,000,000us-gaap_DebtCurrent / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |
Long-term debt | 10,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 10,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  | 116,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |
Debt | 48,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 48,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  | 242,000,000us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |
Stated interest rate (in hundredths) | 2.634%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 2.634%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  |  |  |
Effective interest rate (in hundredths) | 2.63%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 2.63%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 1 [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Debt instrument, original term |  |  |  |  | 3 years |  |  |  |
Terminated Line of Credit |  |  |  |  | 255,000,000mu_TerminatedLineofCredit / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility1Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 4 [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Debt instrument, original term |  |  | 5 years |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 750,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  | 750,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |
Percentage Of Collateral To Face Value Of Issued And Ouststanding Credit Facility | 80.00%mu_PercentageOfCollateralToFaceValueOfIssuedAndOuststandingCreditFacility / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  | 80.00%mu_PercentageOfCollateralToFaceValueOfIssuedAndOuststandingCreditFacility / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 704,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  | 704,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 4 [Member] | Libor [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Margin on variable rate financing (in hundredths) |  |  | 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 4 [Member] | Libor [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Margin on variable rate financing (in hundredths) |  |  | 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility4Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 2 [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Debt instrument, original term |  |  |  |  |  | 3 years |  |  |
Terminated Line of Credit |  |  |  |  |  | 153,000,000mu_TerminatedLineofCredit / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility2Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |
Line of Credit [Member] | Revolving Credit Facility 3 [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Debt instrument, original term |  |  | 5 years |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 540,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  | 540,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 473,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  | 473,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 3 [Member] | Libor [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Margin on variable rate financing (in hundredths) |  |  | 1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Line of Credit [Member] | Revolving Credit Facility 3 [Member] | Libor [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |
Margin on variable rate financing (in hundredths) |  |  | 1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mu_RevolvingCreditFacility3Member / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |
Loans Payable [Member] |  |  |  |  |  |  |  |  |
Long-term Debt, by Maturity [Abstract] |  |  |  |  |  |  |  |  |
Remainder of 2015 | 65,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 65,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
2016 | 287,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 287,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
2017 | 258,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 258,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
2018 | 551,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 551,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
2019 | 643,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 643,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
2020 and thereafter | 4,561,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 4,561,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
Debt Instrument, Unamortized Discount | (592,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | (592,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
Notes Payable | 5,773,000,000us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | 5,773,000,000us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount | $ (592,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  | $ (592,000,000)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember |  |  |  |  |  |
[1] | Weighted-average imputed rate of 3.9% and 4.3% as of March 5, 2015 and August 28, 2014, respectively.
[2] | We have either the obligation or the option to pay cash for the principal amount due upon conversion for all of our convertible notes. Since it is our current intent to settle in cash the principal amount of all of our convertible notes upon conversion, the dilutive effect of such notes on earnings per share is computed under the treasury stock method.
[3] | Since the closing price of our common stock for at least 20 trading days in the 30 trading day period ending on December 31, 2014 exceeded 130% of the conversion price per share, holders had the right to convert their notes at any time during the calendar quarter ended March 31, 2015. The closing price of our common stock also exceeded the thresholds for the calendar quarter ended March 31, 2015; therefore, these notes are convertible by the holders through June 30, 2015. The 2033 Notes are classified as current because the terms of these notes would require us to pay cash for the principal amount of any converted notes.
[4] | The terms of our convertible notes give holders the right to require us to repurchase all or a portion of their notes at a date prior to the contractual maturities of the notes.
[5] | Holders have the right to convert all or a portion of their notes at a date prior to the contractual maturity if, during any calendar quarter, the closing price of our common stock for at least 20 trading days in the 30 consecutive trading days ending on the last trading day of the preceding calendar quarter is more than 130% of the conversion price. The closing price of our common stock exceeded the thresholds for the calendar quarter ended March 31, 2015; therefore, our 2032 Notes and 2033 Notes notes are convertible by the holders through June 30, 2015.
[6] | Based on our closing share price of $29.28 as of March 5, 2015.
[7] | The original principal amount of $820 million accretes up to $917 million in November 2028 and $1.03 billion at maturity in 2043.

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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