Equity - Shareholder Rights Agreement (Details)	Mar. 02, 2017 right_per_share
Equity [Abstract]
Shareholder Rights Plan, Purchase Discount Rights Received (per share)	1

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.

No definition available.

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