Document And Entity Information
 3 Months Ended
Mar. 30, 2014
May 01, 2014
Document and Entity Information [Abstract]    
Entity Registrant Name Spansion Inc.  
Document Type 10-Q  
Current Fiscal Year End Date --12-28  
Entity Common Stock, Shares Outstanding   60,371,219
Amendment Flag false  
Entity Central Index Key 0001322705  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Large Accelerated Filer  
Entity Well-known Seasoned Issuer Yes  
Document Period End Date Mar. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q1