Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 01, 2011	Dec. 02, 2010
Earnings Per Share Basic And Diluted [Line Items]
Antidilutive potential common shares that could dilute basic earnings per share in the future (in shares)	285.5	162.2
Earnings Per Share Reconciliation [Abstract]
Net income (loss) available to Micron shareholders - Basic	$ (187)	$ 155
Net effect of assumed conversion of debt	0	2
Net income (loss) available to Micron shareholders - Diluted	$ (187)	$ 157
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - Basic (in shares)	981.4	972.9
Net effect of dilutive equity awards, escrow shares and assumed conversion of debt (in shares)	0	58.4
Weighted-average common shares outstanding - Diluted (in shares)	981.4	1,031.3
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.19)	$ 0.16
Diluted (in dollars per share)	$ (0.19)	$ 0.15

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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