Variable Interest Entities (Details) (Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member], IM Flash Singapore LLP [Member])	Mar. 01, 2012
Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member] \| IM Flash Singapore LLP [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage (in hundredths)	82.00%

Percentage of the VIE's voting interest owned by the entity. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either does not have equity investors with voting rights or has equity investors that do not provide sufficient financial resources for the entity to support its activities.

No definition available.

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