v2.4.1.9

Equity - Capped Calls (Details) (Call Option [Member], Purchased options [Member], Convertible Debt [Member], USD $) | 6 Months Ended
--- | ---
Mar. 05, 2015
Minimum [Member] |
Option Indexed to Issuer's Equity [Line Items] |
Option indexed to Issuer's Equity, strike price (in dollars per share) | $ 9.50us-gaap_OptionIndexedToIssuersEquityStrikePrice1 / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Option Indexed to Issuer's Equity, capped ceiling | $ 12.67mu_CallOptionIndexedToIssuersEquityCappedCeiling / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Option Indexed To Issuers Equity Settlement Proceeds | $ 0mu_OptionIndexedToIssuersEquitySettlementProceeds / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member] |
Option Indexed to Issuer's Equity [Line Items] |
Option indexed to Issuer's Equity, strike price (in dollars per share) | $ 10.93us-gaap_OptionIndexedToIssuersEquityStrikePrice1 / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Option Indexed to Issuer's Equity, capped ceiling | $ 16.04mu_CallOptionIndexedToIssuersEquityCappedCeiling / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Option Indexed To Issuers Equity Settlement Proceeds | $ 864,000,000mu_OptionIndexedToIssuersEquitySettlementProceeds / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember / us-gaap_OptionIndexedToIssuersEquityEquityAxis = us-gaap_CallOptionMember / us-gaap_PositionAxis = us-gaap_LongMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X
- Definition The 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. + References No definition available. + Details
Name: | mu_CallOptionIndexedToIssuersEquityCappedCeiling
Namespace Prefix: | mu_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Upon the settlement of the capped call transaction, the amount represents the proceeds that could be received. + References No definition available. + Details
Name: | mu_OptionIndexedToIssuersEquitySettlementProceeds
Namespace Prefix: | mu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_OptionIndexedToIssuersEquityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise or strike price stated in the contract for options indexed to the issuer's equity shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=6940734&loc=d3e22047-110879 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 + Details
Name: | us-gaap_OptionIndexedToIssuersEquityStrikePrice1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration