XML 79 R63.htm IDEA: XBRL DOCUMENT v3.21.2

Contingencies (Details) ¥ in Millions, $ in Millions	9 Months Ended		12 Months Ended
	Jun. 03, 2021 CNY (¥) patent lawsuit agreement	Jun. 03, 2021 USD ($) patent lawsuit agreement	Aug. 30, 2018
Pending Litigation | Micron vs United Microelectronics Corp and Fujian Jinhua Integrated Circuit Co
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Micron Intel JV Arbitration Matter | Minimum
Loss Contingencies [Line Items]
Loss Contingency, Agreements Allegedly Breached, Number | agreement	1	1
Pending Litigation | Allied Telesis K.K. vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Under Appeal | Qimonda AG Inotera Share Purchase Proceedings
Loss Contingencies [Line Items]
Percentage of total Inotera shares subject to litigation (in hundredths)	18.00%	18.00%
Loss contingency, judgment under appeal | $		$ 1
Loss Contingency, Pending Claims, Number	1	1
Under Appeal | Employee Class Action vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Innovative Memory Solutions, Inc. vs Micron-Complaint 1
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	8	8
Patent Matters | Pending Litigation | MLC Intellectual Property, LLC vs Micron
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Elm 3DS Innovations, LLC vs Micron
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	13	13
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Innovative Memory Solutions, Inc. vs Micron-Complaint 1
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	2	2
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 1
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 98
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 2
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 98
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | United Microelectronics Corporation vs Micron-Complaint 1
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 90
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | United Microelectronics Corporation vs Micron-Complaint 2
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 90
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Fuzhou Court Preliminary Injunction
Loss Contingencies [Line Items]
Percent of annualized revenue derived from impacted products			1.00%
Patent Matters | Pending Litigation | Flash-Control, LLC vs Micron
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	4	4
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Netlist Inc. vs Micron
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Netlist Inc vs Micron-Complaint 2
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	3	3
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Pending Litigation | Vervain LLC vs Micron
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	4	4
Loss Contingency, Pending Claims, Number	1	1
Patent Matters | Withdrawn Litigation | Innovative Memory Solutions, Inc. vs Micron-Complaint 1
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	6	6
Patent Matters | Withdrawn Litigation | United Microelectronics Corporation vs Micron-Complaint 3
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 90
Loss Contingency, Claims Withdrawn, Number	1	1
Antitrust Matters | Pending Litigation | Further Amended Consolidated Indirect Purchasers CA vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Antitrust Matters | Pending Litigation | Further Amended Consolidated Direct Purchasers CA vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Antitrust Matters | Pending Litigation | DRAM Purchasers Canada vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	6	6
Antitrust Matters | Joined Litigation | Initial direct DRAM Purchasers United States vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Joined, Number	1	1
Antitrust Matters | Joined Litigation | Subsequent direct DRAM Purchasers United States vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Joined, Number	4	4
Antitrust Matters | Dismissed Litigation | Initial indirect DRAM Purchasers United States vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Antitrust Matters | Dismissed Litigation | Subsequent indirect DRAM Purchasers United States vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	2	2
Antitrust Matters | Dismissed Litigation | Consolidated Amended Indirect Purchasers CA vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Antitrust Matters | Dismissed Litigation | Consolidated Amended Direct Purchasers CA vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Securities Matters | Pending Litigation | Shareholder Class Action Delaware Court vs Micron.
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Securities Matters | Pending Litigation | Shareholder Class Action Delaware Court_2 vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1

X

- Definition

Loss Contingency, Agreements Allegedly Breached, Number

+ References

No definition available.

+ Details

Name:	mu_LossContingencyAgreementsAllegedlyBreachedNumber
Namespace Prefix:	mu_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of claims joined or combined with other claims to form a single lawsuit.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyClaimsJoinedNumber
Namespace Prefix:	mu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of claims withdrawn by plaintiff.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyClaimsWithdrawnNumber
Namespace Prefix:	mu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loss contingency resulting from a judgment that is currently under appeal. While not probable as of the reporting date, this judgment could result in an obligation to pay the disclosed amount.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyJudgmentUnderAppeal
Namespace Prefix:	mu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The estimated percent of revenue that could potentially be impacted by a loss contingency.

+ References

No definition available.

+ Details

Name:	mu_LossContingencyPercentofPotentiallyImpactedRevenue
Namespace Prefix:	mu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of subsidiary or equity method investee shares that are subject to legal proceedings.

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Number of claims dismissed.

+ References

No definition available.

+ Details

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

X

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

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

X

- 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

X

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

+ Details

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

X

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_MicronvsUnitedMicroelectronicsCorpandFujianJinhuaIntegratedCircuitCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_MicronIntelJVArbitrationMatterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_AlliedTelesisKKMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=mu_UnderAppealMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_QimondaAgInoteraSharePurchaseProceedingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_EmployeeClassActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_LitigationCaseAxis=mu_InnovativeMemorySolutionsIncDelawareCourtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_MLCIntellectualPropertyLLC.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_Elm3DSInnovationsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_FujianJinhuaIntegratedCircuitCo.Ltd.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_FujianJinhuaIntegratedCircuitCo.Ltd.Complaint2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_UnitedMicroelectronicsCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_UnitedMicroelectronicsCorporationComplaint2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_FuzhouCourtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_FlashControlLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_NetlistIncComplaintMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_NetlistIncComplaint2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_VervainLLCComplaintMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=mu_WithdrawnLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_UnitedMicroelectronicsCorporationComplaint3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_LitigationCaseAxis=mu_FurtherAmendedConsolidatedIndirectPurchasersCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_FurtherAmendedConsolidatedDirectPurchasersCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_DRAMPurchasersCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=mu_JoinedLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_InitialdirectDRAMPurchasersUnitedStatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_SubsequentdirectDRAMPurchasersUnitedStatesMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=mu_DismissedLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_InitialindirectDRAMPurchasersUnitedStatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_SubsequentindirectDRAMPurchasersUnitedStatesMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_ConsolidatedAmendedIndirectPurchasersCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_ConsolidatedAmendedDirectPurchasersCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=mu_SecuritiesMattersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_ShareholderDerivativeComplaintDelawareCourtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=mu_ShareholderDerivativeComplaintDelawareCourt_2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: