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Equity Method Investments (Details)
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3 Months Ended |
6 Months Ended |
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3 Months Ended |
6 Months Ended |
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3 Months Ended |
6 Months Ended |
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3 Months Ended |
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3 Months Ended |
6 Months Ended |
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12 Months Ended |
3 Months Ended |
6 Months Ended |
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Mar. 05, 2015
USD ($)
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Feb. 27, 2014
USD ($)
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Mar. 05, 2015
USD ($)
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Feb. 27, 2014
USD ($)
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Aug. 28, 2014
USD ($)
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Mar. 05, 2015
Inotera [Member]
USD ($)
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Feb. 27, 2014
Inotera [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
USD ($)
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Feb. 27, 2014
Inotera [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
TWD
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Aug. 28, 2014
Inotera [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
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Feb. 27, 2014
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
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Feb. 27, 2014
Inotera [Member]
Inventories [Member]
DRAM [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
Nanya [Member]
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Mar. 05, 2015
Inotera [Member]
Income Tax Expense (Benefit), Adjustment of Deferred Tax (Asset) Liability [Member]
USD ($)
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Mar. 05, 2015
Inotera [Member]
Variable interest entity, not primary beneficiary [Member]
USD ($)
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Mar. 05, 2015
Tera Probe [Member]
USD ($)
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Dec. 04, 2014
Tera Probe [Member]
USD ($)
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Feb. 27, 2014
Tera Probe [Member]
USD ($)
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Mar. 05, 2015
Tera Probe [Member]
USD ($)
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Feb. 27, 2014
Tera Probe [Member]
USD ($)
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Mar. 05, 2015
Tera Probe [Member]
JPY (¥)
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Aug. 28, 2014
Tera Probe [Member]
USD ($)
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Aug. 29, 2013
Tera Probe [Member]
MMJ Acquisition [Member]
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Mar. 05, 2015
Other [Member]
USD ($)
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Feb. 27, 2014
Other [Member]
USD ($)
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Mar. 05, 2015
Other [Member]
USD ($)
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Feb. 27, 2014
Other [Member]
USD ($)
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Aug. 28, 2014
Other [Member]
USD ($)
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| Schedule of Equity Method Investments [Line Items] |
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| Investment Balance |
$ 1,239,000,000us-gaap_EquityMethodInvestments |
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$ 1,239,000,000us-gaap_EquityMethodInvestments |
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$ 971,000,000us-gaap_EquityMethodInvestments |
$ 1,190,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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$ 1,190,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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$ 914,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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$ 32,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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$ 32,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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$ 48,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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$ 17,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
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$ 17,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
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$ 9,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
| Ownership Percentage (in hundredths) |
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33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
[1] |
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40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Variable Interest Entity Entity Maximum Loss Exposure Amount From Investment Balance |
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1,190,000,000mu_VariableInterestEntityEntityMaximumLossExposureAmountFromInvestmentBalance / dei_LegalEntityAxis = us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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| Equity in net income of equity method investees, net of tax |
208,000,000us-gaap_IncomeLossFromEquityMethodInvestments |
134,000,000us-gaap_IncomeLossFromEquityMethodInvestments |
332,000,000us-gaap_IncomeLossFromEquityMethodInvestments |
220,000,000us-gaap_IncomeLossFromEquityMethodInvestments |
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206,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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131,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
335,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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215,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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65,000,000us-gaap_IncomeLossFromEquityMethodInvestments / mu_IncomeTaxesAxis = mu_IncomeTaxExpenseBenefitAdjustmentofDeferredTaxAssetLiabilityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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1,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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4,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
(6,000,000)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
6,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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1,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
(1,000,000)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
3,000,000us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
(1,000,000)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_OtherEquityMethodInvetmentsMember |
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| Percentage interest held by a third party (in hundredths) |
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33.00%mu_EquityMethodInvestmentOwnershipPercentageHeldByThirdParty / mu_EntityWhichWePartnerWithInInvestmentAxis = mu_NanyaMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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| Market value of equity interests |
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3,090,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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3,090,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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33,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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33,000,000us-gaap_EquityMethodInvestmentQuotedMarketValue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Equity Method Investment, Quoted Market Price Per Share |
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45.25mu_EquityMethodInvestmentQuotedMarketPricePerShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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¥ 1,076mu_EquityMethodInvestmentQuotedMarketPricePerShare / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Amount in accumulated other comprehensive income (loss) for cumulative translation adjustments on its investment |
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(19,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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(19,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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44,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember |
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| Purchases of DRAM products from Inotera |
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628,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_ProductOrServiceAxis = mu_DramMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember |
714,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_ProductOrServiceAxis = mu_DramMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember |
1,360,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_ProductOrServiceAxis = mu_DramMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember |
1,300,000,000us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases / us-gaap_ProductOrServiceAxis = mu_DramMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_InoteraMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember |
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| Cumulative Percentage Ownership after All Transactions |
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40.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / us-gaap_BusinessAcquisitionAxis = mu_MMJAcquisitionMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Tera Probe other-than-temporary Impairment |
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10,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Difference between cost of Tera Probe investment and underlying equity |
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$ 31,000,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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$ 31,000,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mu_TeraProbeMember |
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| Weighted-average period for remaining Tera Probe amortization (in years) |
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7 years |
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