Document and Entity Information Document (USD $)	12 Months Ended
	Sep. 01, 2011	Oct. 18, 2011	Mar. 03, 2011
Entity Information [Line Items]
Entity Registrant Name	MICRON TECHNOLOGY INC
Entity Central Index Key	0000723125
Current Fiscal Year End Date	--09-01
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Sep. 01, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		987,573,286
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 9,100,000,000