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Consolidated Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended					1 Months Ended	12 Months Ended		12 Months Ended
	Sep. 01, 2011	Sep. 02, 2010	Sep. 03, 2009	May 31, 2009	Sep. 01, 2011 IM Flash [Member] Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member]	Sep. 02, 2010 IM Flash [Member] Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member]	Sep. 03, 2009 IM Flash [Member] Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member]	Sep. 01, 2011 MP Mask Technology Center, LLC [Member] Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member]	Sep. 03, 2009 MP Mask Technology Center, LLC [Member] Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member]	Sep. 30, 2011 Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member] IM Flash Singapore LLP [Member]	Sep. 01, 2011 Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member] IM Flash Singapore LLP [Member]	Sep. 01, 2011 Variable Interest Entities Which We Have Determined That We Are the Primary Beneficiary [Member] IM Flash Technologies, LLC [Member]	Sep. 03, 2009 MP Mask Technology Center, LLC [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage (in hundredths)								50.01%			86.00%	51.00%
Variable interest entity, ownership percentage by noncontrolling owners (in hundredths)								49.99%			14.00%	49.00%
Lag on change in ownership on right to receive Output (in months)											12M
Micron share of IMFS cost and supply											57.00%
Micron contributions to IM Flash					$ 1,580	$ 128	$ 25	$ 9		$ 103
Ownership percentage after stock transactions during period (in hundredths)										82.00%
R and D expenses reduced by reimbursements from Intel	95	104	107
IM Flash sales to Intel	884	764	886
Receivables from and payables to Intel: [Abstract]
Receivables from Intel for net sales	165	128
IM Flash's distributions to, and contributions from, shareholders [Abstract]
Distributions to Micron from consolidated VIE's					234	278	723						10
Distributions to noncontrolling interests from consolidated VIE's	225	267	705		225	267	695		10
Micron contributions to consolidated VIE's					1,580	128	25	9		103
Cash received from noncontrolling interests	8	38	24		0	38	24	8		131
Property Subject to or Available for Operating Lease, Net [Abstract]
Aggregate lease payments from Photronics				41
Photronics lease payments received	8	7
Carrying value of facility leased to Photronics	$ 44	$ 47