2.4.0.82414403 - Disclosure - Micron Shareholders' Equity and Noncontrolling Interests in Subsidiaries Shareholders' Equity - Capped Call Transactions (Details)truefalseIn Millions, except Per Share data, unless otherwise specifiedfalse1false USDfalsefalse$D2013Q3YTDhttp://www.sec.gov/CIK0000723125duration2012-08-31T00:00:002013-05-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q3YTDhttp://www.sec.gov/CIK0000723125duration2011-09-02T00:00:002012-05-31T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$D2013Q3YTD_us-gaap_LongtermDebtTypeAxis_mu_ConvertibleSeniorNotesDue2033Member_us-gaap_OptionIndexedToIssuersEquityEquityAxis_us-gaap_PurchasedCallOptionMemberhttp://www.sec.gov/CIK0000723125duration2012-08-31T00:00:002013-05-30T00:00:00falsefalsePurchased Call Option [Member]us-gaap_OptionIndexedToIssuersEquityEquityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PurchasedCallOptionMemberus-gaap_OptionIndexedToIssuersEquityEquityAxisexplicitMemberfalsefalseConvertible Senior Notes Due 2033 [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimu_ConvertibleSeniorNotesDue2033Memberus-gaap_LongtermDebtTypeAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0usd_per_sharecappedcallDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.micron.com/20130530decimalmu0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDtruefalse$D2013Q1_us-gaap_LongtermDebtTypeAxis_mu_ConvertibleSeniorNotesDue2013Member_us-gaap_OptionIndexedToIssuersEquityEquityAxis_us-gaap_PurchasedCallOptionMemberhttp://www.sec.gov/CIK0000723125duration2012-08-31T00:00:002012-11-29T00:00:00falsefalsePurchased Call Option [Member]us-gaap_OptionIndexedToIssuersEquityEquityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PurchasedCallOptionMemberus-gaap_OptionIndexedToIssuersEquityEquityAxisexplicitMemberfalsefalse2013 convertible senior notes [Member]us-gaap_LongtermDebtTypeAxisxbrldihttp://xbrl.org/2006/xbrldimu_ConvertibleSeniorNotesDue2013Memberus-gaap_LongtermDebtTypeAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0usd_per_sharecappedcallDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.micron.com/20130530decimalmu0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_OptionIndexedToIssuersEquityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Option Indexed to Issuer's Equity [Line Items]2false 4us-gaap_OptionIndexedToIssuersEquityStrikePriceus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse10.9310.93falsefalsefalse4truefalsefalse5.085.08falsefalsefalseus-types:perUnitItemTypedecimalThe exercise (or strike) price stated in the contract. The fixed price at which the option holder can purchase, in the case of a call option, or sell, in the case of a put option, on the underlying security.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 00-19 -Paragraph 50 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 false0Option indexed to issuer's equity, strike price (in dollars per share)3false 4mu_CallOptionIndexedToIssuersEquityCappedCeilingmu_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse14.5114.51USD$falsetruefalse4truefalsefalse6.646.64USD$falsetruefalsenum:perShareItemTypedecimalThe cap price on a call option indexed to the entities own stock. A payment or receipt is triggered if the entities stock price is above the initial strike price with maximim proceeds dictated by the stated cap price.No definition available.false3Option Indexed to Issuer's Equity, capped ceiling (in dollars per share)4false 4us-gaap_OptionIndexedToIssuersEquitySharesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse5490000054.9falsefalsefalse4truefalsefalse4520000045.2falsefalsefalsexbrli:sharesItemTypesharesThe maximum number of shares that could be issued to net share settle a contract, if applicable. If a contract does not have a fixed or determinable maximum number of shares that may be required to be issued, disclose the fact that a potentially infinite number of shares could be issued to settle the contract.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 00-19 -Paragraph 50 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (b)(2),(c) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 false1Option indexed to issuer's equity, shares (in shares)5false 4mu_OptionIndexedToIssuersEquitySettlementMinimumProceedsmu_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUpon the settlement of the capped call transaction, the amount represents the minimum proceeds that could be received.No definition available.false2Option Indexed To Issuers Equity Settlement Minimum Proceeds6false 4mu_OptionIndexedToIssuersEquitySettlementMaximumProceedsmu_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse196000000196falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUpon the settlement of the capped call transaction, amount represents the maximum amount that could be received.No definition available.false2Option Indexed to Issuer's Equity, Settlement Maximum Proceeds7false 4mu_OptionIndexedToIssuersEquityCashPaidmu_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4800000048falsefalsefalse2truefalsefalse102000000102falsefalsefalse3truefalsefalse4800000048falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe entity (the buyer) purchases call options that provide it with the right, but not the obligation, to buy from the seller, shares of the entity's stock at a specified price.No definition available.false2Option indexed to issuers equity cash paid8false 4mu_OptionIndexedToIssuersEquitySettlementCashReceivedmu_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2400000024USD$falsetruefalse2truefalsefalse00USD$falsetruefalse3falsefalsefalse00falsefalsefalse4truefalsefalse2400000024USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe cash received upon the cash settlement of the options the entity bought which indexed to the company's own stock.No definition available.false2Option indexed to issuers equity cash received upon settlementfalseMicron Shareholders' Equity and Noncontrolling Interests in Subsidiaries Shareholders' Equity - Capped Call Transactions (Details) (USD $)MillionsHundredThousandsNoRoundingUnKnowntruefalsefalseSheethttp://www.micron.com/role/MicronShareholdersEquityAndNoncontrollingInterestsInSubsidiariesShareholdersEquityCappedCallTransactionsDetails48