Equity Method Investment Net Carrying Value Of Shares Subject to Litigation

No definition available.

Name:	mu_EquityMethodInvestmentNetCarryingValueOfSharesSubjectToLitigation
Namespace Prefix:	mu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the aggregate value of each identified investment accounted for under the equity method of accounting subject to litigation based on the quoted market price for those investments in common stock for which a quoted market price is available.

+ References

No definition available.

+ Details

Name:	mu_EquityMethodInvestmentQuotedMarketValueOfSharesSubjecttoLitigation
Namespace Prefix:	mu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The approximate percentage of shares of an equity method investment owned by the entity which are currently subject to litigation.

+ References

No definition available.

+ Details

Name:	mu_EquityMethodInvestmentSharesOwnedSubjecttoLitigation
Namespace Prefix:	mu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of petitions submitted to the Patent and Trademark Office for inter-partes review, challenging the validity of the patents in suit.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyNumberOfPetitionsSubmittedForInterPartesReview
Namespace Prefix:	mu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of patents found to be invalid by the Patent and Trademark Office.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyPatentsFoundInvalidNumber
Namespace Prefix:	mu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of installment payments to be made upon final court approval of the class settlements.

+ References

No definition available.

+ Details

Name:	mu_LossContingencySettlementAgreementNumberOfInstallmentPayments
Namespace Prefix:	mu_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of year over which installment payments will be made upon final court approval of the class settlements.

+ References

No definition available.

+ Details

Name:	mu_LossContingencySettlementAgreementNumberOfYearsForInstallmentPayments1
Namespace Prefix:	mu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of U. S. states and territories whose Attorneys General filed suit.

+ References

No definition available.

+ Details

Name:	mu_NumberOfUsStatesAndTerritoriesFilingSuit
Namespace Prefix:	mu_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyDamagesAwardedValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of defendants named in a legal action.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfDefendants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The effective date of a duly executed litigation settlement agreement.

+ References

+ Details

Name:	us-gaap_LossContingencySettlementAgreementDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LitigationCaseAxis=mu_QimondaAgInoteraSharePurchaseProceedingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=mu_AntitrustMattersMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=mu_PatentMattersMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=mu_SecuritiesMatterMember
Namespace Prefix:
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Contingencies (Details) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended	1 Months Ended	29 Months Ended
Contingencies (Details) (USD $)	Mar. 13, 2014	Dec. 04, 2014 integer	Jun. 23, 2010 integer	Jul. 31, 2006 integer	Nov. 29, 2012	Mar. 10, 2014 integer
Qimonda AG Inotera Share Purchase Proceedings [Member] \| Inotera [Member]
Loss Contingencies [Line Items]
Loss contingency, damages awarded, value	$ 1,000,000
Equity method investment carrying value of shares acquired from Qimonda		568,000,000
Equity method investment quoted market value of shares acquired from Qimonda		1,860,000,000
Equity method investment approximate percentage of Inotera shares acquired from Qimonda		55.00%
Patent Matters [Member] \| HSM Portfolio LLC and Technology Properties LLC [Member]
Loss Contingencies [Line Items]
Number of other defendants		17
Number of patents allegedly infringed		4
Patent Matters [Member] \| HSM Portfolio LLC and Technology Properties LLC [Member] \| Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed		2
Patent Matters [Member] \| Board Of Trustees For The University Of Illinois [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed		3
Number of petitions submitted for inter-partes review		3
Number of patent claims found to be invalid by the Patent and Trademark Office						3
Patent Matters [Member] \| Semcon Tech, LLC [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed		1
Patent Matters [Member] \| Innovative Memory Solutions, Inc. [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed		8
Antitrust Matters [Member] \| DRAM Purported Class Action Price-fixing Lawsuit [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed		68
Approximate number of U.S. states and territories filing suit				40
Settlement agreement execution date		June 23, 2010
Settlement agreement amount			67,000,000
Settlement agreement number of installment payments			3
Settlement agreement, number of years for installment payments (in years)		2 years
Amount paid into an escrow account in connection with settlement					$ 67,000,000
Securities Matter [Member] \| Former Shareholders of Elpida Memory, Inc [Member] \| Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member]
Loss Contingencies [Line Items]
Number of plaintiffs		7