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Debt MMJ Debt Restructure (Details)
¥ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2014
JPY (¥)
Sep. 03, 2015
USD ($)
decimal
Aug. 28, 2014
USD ($)
Aug. 29, 2013
USD ($)
Sep. 03, 2015
JPY (¥)
decimal
Assumed Debt Subject to Bankruptcy [Line Items]          
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities   $ 2,329 $ 3,843 $ 743  
Elpida Sponsor Agreement [Abstract]          
Debt Instrument, Unamortized Discount   (697) (898)    
Debt   $ 7,341 6,511    
Reorganization obligation [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Effective interest rate (in thousandths)   6.25%     6.25%
Elpida Sponsor Agreement [Abstract]          
Debt Instrument, Unamortized Discount   $ (150) (238)    
Debt   $ 862 $ 1,131    
Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member] | Reorganization obligation [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Reorganization Plan Payments, Total Cash Payments | ¥         ¥ 200,000
Reorganization Plan Number of Annual Installment Payments | decimal   7     7
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities | ¥ ¥ 21,000        
Elpida Sponsor Agreement [Abstract]          
Debt Instrument, Unamortized Discount   $ (150)     ¥ (17,981)
Debt   862     103,763
Scenario, Plan [Member] | Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member] | Reorganization obligation [Member]          
Elpida Sponsor Agreement [Abstract]          
2016   165     19,813
2017   165     19,840
2018   164     19,762
2019   238     28,687
2020   280     33,642
Estimated Reorganization Payment to Third Party Creditors, Total Cash Payments   $ 1,012     ¥ 121,744
Secured Creditors [Member] | Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member] | Reorganization obligation [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Reorganization Plan Number of Annual Installment Payments | decimal   6     6
Recovery Rate of Reorganization Plan Creditors   100.00%     100.00%
Unsecured Creditor [Member] | Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member] | Reorganization obligation [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Reorganization Plan Number of Annual Installment Payments | decimal   7     7
Unsecured Creditor [Member] | Elpida Memories, Inc. now known as Micron Memory Japan, Inc. [Member] | Reorganization obligation [Member] | Minimum [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Recovery Rate of Reorganization Plan Creditors   17.40%     17.40%
Unsecured Creditor [Member] | Akita, now known as Micron Akita, Inc. [Member] | Reorganization obligation [Member]          
Assumed Debt Subject to Bankruptcy [Line Items]          
Reorganization Plan Number of Annual Installment Payments | decimal   7     7
Recovery Rate of Reorganization Plan Creditors   19.00%     19.00%