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Contingencies (Details) - 9 months ended May 31, 2018
¥ in Millions, $ in Millions
CNY (¥)
patent
USD ($)
Pending Litigation | Qimonda AG Inotera Share Purchase Proceedings    
Loss Contingencies [Line Items]    
Percentage of total Inotera shares subject to litigation (in hundredths)   18.00%
Loss contingency, judgment under appeal | $   $ 1
Patent Matters | Pending Litigation | Elm 3DS Innovations, LLC    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 13  
Patent Matters | Pending Litigation | Innovative Memory Solutions, Inc.    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 8  
Patent Matters | Settled Litigation | Harvard University    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 2  
MXA and MSS | Patent Matters | Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd.    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 1  
Damages sought on alleged patent infringement | ¥ ¥ 98  
MXA and MSS | Patent Matters | Pending Litigation | United Microelectronics Corporation    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 1  
Damages sought on alleged patent infringement | ¥ ¥ 90  
MSS | Patent Matters | Pending Litigation    
Loss Contingencies [Line Items]    
Number of patents allegedly infringed 3  
MSS | Patent Matters | Pending Litigation | United Microelectronics Corporation Complaint 2    
Loss Contingencies [Line Items]    
Damages sought on alleged patent infringement | ¥ ¥ 90  
MSS | Patent Matters | Pending Litigation | United Microelectronics Corporation Complaint 3    
Loss Contingencies [Line Items]    
Damages sought on alleged patent infringement | ¥ 90  
MSS | Patent Matters | Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd. Complaint 2    
Loss Contingencies [Line Items]    
Damages sought on alleged patent infringement | ¥ ¥ 98