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Income Taxes (Details 1) (MMJ Group [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 05, 2015
Feb. 27, 2014
Mar. 05, 2015
Feb. 27, 2014
MMJ Group [Member]
       
Deferred [Abstract]        
Deferred foreign income tax provision $ 33us-gaap_DeferredForeignIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= mu_MMJGroupMember
$ 55us-gaap_DeferredForeignIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= mu_MMJGroupMember
$ 71us-gaap_DeferredForeignIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= mu_MMJGroupMember
$ 128us-gaap_DeferredForeignIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= mu_MMJGroupMember