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Equity - Shareholder Rights Plan (Details) | 12 Months Ended
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Aug. 31, 2017 right_per_share
Equity [Abstract] |
Shareholder Rights Agreement, Purchase Discount Rights Received, Ratio | 1
Shareholder Rights Agreement, Beneficial Ownership Increase Trigger, Percent | 50.00%
Shareholder Rights Agreement, Ownership Evaluation Period | 3 years
Shareholder Rights Agreement, Beneficial Owner Status Trigger, Percent | 4.99%

X
- Definition The percentage threshold above which an equity holder (or group) becomes a beneficial owner. + References No definition available. + Details
Name: | mu_ShareholderRightsAgreementBeneficialOwnerStatusTriggerPercent
Namespace Prefix: | mu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percent increase in ownership resulting in beneficial ownership (or adding to a beneficial ownership interest) resulting in a triggering of rights under a shareholder rights agreement, assuming other conditions are met. + References No definition available. + Details
Name: | mu_ShareholderRightsAgreementBeneficialOwnershipIncreaseTriggerPercent
Namespace Prefix: | mu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The period of time in which ownership increases by a beneficial owner (or group) exceeding the percentage increase trigger must occur in order to initiate shareholder agreement rights. + References No definition available. + Details
Name: | mu_ShareholderRightsAgreementOwnershipEvaluationPeriod
Namespace Prefix: | mu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of share purchase rights received for each common share held (as of a record date) which become exercisable upon change of ownership triggering events. + References No definition available. + Details
Name: | mu_ShareholderRightsAgreementPurchaseDiscountRightsReceivedRatio
Namespace Prefix: | mu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration