v2.4.1.9
Equity Method Investments (Details)
3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Dec. 04, 2014
USD ($)
Nov. 28, 2013
USD ($)
Aug. 28, 2014
USD ($)
Dec. 04, 2014
Inotera [Member]
USD ($)
Nov. 28, 2013
Inotera [Member]
USD ($)
Dec. 04, 2014
Inotera [Member]
TWD
Aug. 28, 2014
Inotera [Member]
USD ($)
Dec. 04, 2014
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
Nov. 28, 2013
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
Dec. 04, 2014
Inotera [Member]
Nanya [Member]
Dec. 04, 2014
Inotera [Member]
Variable interest entity, not primary beneficiary [Member]
USD ($)
Dec. 04, 2014
Tera Probe [Member]
USD ($)
Nov. 28, 2013
Tera Probe [Member]
USD ($)
Aug. 28, 2014
Tera Probe [Member]
USD ($)
Aug. 29, 2013
Tera Probe [Member]
MMJ Acquisition [Member]
Dec. 04, 2014
Other [Member]
USD ($)
Nov. 28, 2013
Other [Member]
USD ($)
Aug. 28, 2014
Other [Member]
USD ($)
Schedule of Equity Method Investments [Line Items]                                    
Investment Balance $ 1,080,000,000us-gaap_EquityMethodInvestments   $ 971,000,000us-gaap_EquityMethodInvestments $ 1,028,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
[1]     $ 914,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
[1]         $ 36,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
  $ 48,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
  $ 16,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_OtherEquityMethodInvetmentsMember
  $ 9,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_OtherEquityMethodInvetmentsMember
Ownership Percentage (in hundredths)       33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
[1]     33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
[1]         40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
  40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
       
Variable Interest Entity Entity Maximum Loss Exposure Amount From Investment Balance                     1,028,000,000mu_VariableInterestEntityEntityMaximumLossExposureAmountFromInvestmentBalance
/ dei_LegalEntityAxis
= us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
             
Equity in net income of equity method investees, net of tax 124,000,000us-gaap_IncomeLossFromEquityMethodInvestments 86,000,000us-gaap_IncomeLossFromEquityMethodInvestments   129,000,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
84,000,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
            (7,000,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
2,000,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
    2,000,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_OtherEquityMethodInvetmentsMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_OtherEquityMethodInvetmentsMember
 
Percentage interest held by a third party (in hundredths)                   33.00%mu_EquityMethodInvestmentOwnershipPercentageHeldByThirdParty
/ mu_EntityWhichWePartnerWithInInvestmentAxis
= mu_NanyaMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
               
Market value of equity interests       3,370,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
                           
Equity Method Investment, Quoted Market Price Per Share           48.90mu_EquityMethodInvestmentQuotedMarketPricePerShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
                       
Amount in accumulated other comprehensive income (loss) for cumulative translation adjustments on its investment       25,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
    44,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
                     
Purchases of DRAM products from Inotera               729,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases
/ us-gaap_ProductOrServiceAxis
= mu_DramMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_InventoriesMember
587,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases
/ us-gaap_ProductOrServiceAxis
= mu_DramMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_InoteraMember
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_InventoriesMember
                 
Cumulative Percentage Ownership after All Transactions                             40.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
/ us-gaap_BusinessAcquisitionAxis
= mu_MMJAcquisitionMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
     
Tera Probe other-than-temporary Impairment                       10,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
           
Difference between cost of Tera Probe investment and underlying equity                       $ 34,000,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mu_TeraProbeMember
           
Weighted-average period for remaining Tera Probe amortization (in years)                       7 years            
[1] (1) Entity is a variable interest entity.