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Debt - Extinguishment of Debt (Details) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
6 Months Ended |
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Mar. 05, 2015
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Feb. 27, 2014
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Mar. 05, 2015
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Feb. 27, 2014
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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$ 723mu_DebtInstrumentIncreaseDecreaseNetPrincipal |
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| Debt Instrument, Increase (Decrease), Net |
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482us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet |
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| Cash, Increase (Decrease), Net Change As A Result Of Debt Restructure Activities |
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334mu_CashIncreaseDecreaseNetChangeAsAResultOfDebtRestructureActivities |
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| Debt Instrument, Decrease in Equity |
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(106)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent |
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| (Loss) gain on restructure of debt |
0mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet |
(80)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet |
(30)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet |
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(155)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet |
| Convertible Notes Payable [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(120)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Increase (Decrease), Net |
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(368)us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(407)mu_RepaymentstoSettleLongtermDebtObligationsGross / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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(14)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Volume-weighted-average price of our common stock period of consecutive trading days (in days) |
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20mu_DerivativeTermofContractConsecutiveTradingDays / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Interest and debt expense incurred through restructure of debt |
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112us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Face value of debt extinguished |
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351us-gaap_ExtinguishmentOfDebtAmount / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Convertible Notes Payable [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(36)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Extinguishment of debt carrying amount |
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(30)mu_ExtinguishmentOfDebtCarryingAmount / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(125)mu_RepaymentstoSettleLongtermDebtObligationsGross / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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(92)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Face value of debt extinguished |
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164us-gaap_ExtinguishmentOfDebtAmount / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Convertible Notes Payable [Member] | Exchanged [Member] |
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| Extinguishment of Debt [Line Items] |
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| Interest and debt expense incurred through restructure of debt |
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49us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ExchangedMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Face value of debt extinguished |
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440us-gaap_ExtinguishmentOfDebtAmount / mu_DebtRestructuringTypeAxis = mu_ExchangedMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Convertible Notes Payable [Member] | 2031B convertible senior notes [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(114)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Increase (Decrease), Net |
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(362)us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(389)mu_RepaymentstoSettleLongtermDebtObligationsGross / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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0mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Convertible Notes Payable [Member] | 2032C convertible senior notes [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(5)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Extinguishment of debt carrying amount |
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(4)mu_ExtinguishmentOfDebtCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(18)mu_RepaymentstoSettleLongtermDebtObligationsGross / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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(13)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Convertible Notes Payable [Member] | 2032D convertible senior notes [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(31)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Extinguishment of debt carrying amount |
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(26)mu_ExtinguishmentOfDebtCarryingAmount / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(107)mu_RepaymentstoSettleLongtermDebtObligationsGross / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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(79)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Convertible Notes Payable [Member] | 2033E convertible senior notes [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(6)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Increase (Decrease), Net |
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(6)us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(18)mu_RepaymentstoSettleLongtermDebtObligationsGross / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Debt Instrument, Decrease in Equity |
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(14)mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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| Corporate bonds [Member] | 2023 senior notes [Member] | Debt Issuance [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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1,000mu_DebtInstrumentIncreaseDecreaseNetPrincipal / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / mu_DebtRestructuringTypeAxis = mu_DebtIssuanceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |
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| Debt Instrument, Increase (Decrease), Net |
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1,000us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / mu_DebtRestructuringTypeAxis = mu_DebtIssuanceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |
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| Proceeds from Debt, Net of Issuance Costs |
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988us-gaap_ProceedsFromDebtNetOfIssuanceCosts / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / mu_DebtRestructuringTypeAxis = mu_DebtIssuanceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |
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| Debt Instrument, Decrease in Equity |
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0mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / mu_DebtRestructuringTypeAxis = mu_DebtIssuanceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |
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| Notes Payable, Other Payables [Member] | Prepayment [Member] |
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| Extinguishment of Debt [Line Items] |
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| Debt Instrument, Increase (Decrease), Net Principal |
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(121)mu_DebtInstrumentIncreaseDecreaseNetPrincipal / mu_DebtRestructuringTypeAxis = mu_PrepaymentMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |
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| Extinguishment of debt carrying amount |
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(120)mu_ExtinguishmentOfDebtCarryingAmount / mu_DebtRestructuringTypeAxis = mu_PrepaymentMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |
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| Repayments to Settle Long-term Debt Obligations, Gross |
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(122)mu_RepaymentstoSettleLongtermDebtObligationsGross / mu_DebtRestructuringTypeAxis = mu_PrepaymentMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |
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| Debt Instrument, Decrease in Equity |
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0mu_DebtInstrumentIncreaseDecreaseNetEquityComponent / mu_DebtRestructuringTypeAxis = mu_PrepaymentMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |
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| Other Non-Operating Income Expense Net [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(30)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(22)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Interest and debt expense incurred through restructure of debt |
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106us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(3)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Interest and debt expense incurred through restructure of debt |
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11us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Exchanged [Member] |
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| Extinguishment of Debt [Line Items] |
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| Interest and debt expense incurred through restructure of debt |
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38us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ExchangedMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2031B convertible senior notes [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(24)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2031BMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2032C convertible senior notes [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(1)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032CMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2032D convertible senior notes [Member] | Repurchase [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(2)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2032DMember / mu_DebtRestructuringTypeAxis = mu_RepurchaseMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2033E convertible senior notes [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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2mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_DebtInstrumentAxis = mu_ConvertibleSeniorNotesDue2033EMember / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Corporate bonds [Member] | 2023 senior notes [Member] | Debt Issuance [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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0mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / us-gaap_DebtInstrumentAxis = mu_Unsecuredseniorcorporatedebtdue2023Member / mu_DebtRestructuringTypeAxis = mu_DebtIssuanceMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_CorporateDebtSecuritiesMember |
[1] |
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| Other Non-Operating Income Expense Net [Member] | Notes Payable, Other Payables [Member] | Prepayment [Member] |
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| Extinguishment of Debt [Line Items] |
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| (Loss) gain on restructure of debt |
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(5)mu_GainsLossesOnExtinguishmentOfDebtAndDerivativeGainLossOnDerivativeNet / mu_DebtRestructuringTypeAxis = mu_PrepaymentMember / us-gaap_IncomeStatementLocationAxis = mu_OtherNonOperatingIncomeExpenseNetMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |
[1] |
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| Interest Expense [Member] | Convertible Notes Payable [Member] | Conversion And Settlement [Member] |
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| Extinguishment of Debt [Line Items] |
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| Interest and debt expense incurred through restructure of debt |
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6us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ConversionAndSettlementMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
| Interest Expense [Member] | Convertible Notes Payable [Member] | Exchanged [Member] |
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| Extinguishment of Debt [Line Items] |
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| Interest and debt expense incurred through restructure of debt |
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$ 11us-gaap_InterestAndDebtExpense / mu_DebtRestructuringTypeAxis = mu_ExchangedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember |
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