Document And Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 31, 2013
Common Class A [Member]
Jul. 31, 2013
Common Class B [Member]
Document Information [Line Items]      
Entity Registrant Name Spansion Inc.    
Document Type 10-Q    
Current Fiscal Year End Date --12-29    
Entity Common Stock, Shares Outstanding   58,729,476 1
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 No    
Document Period End Date Jun. 30, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus Q2