Document And Entity Information
9 Months Ended
Sep. 30, 2012
Oct. 25, 2012
Common Class A [Member]
Oct. 25, 2012
Common Class B [Member]
Entity Registrant Name Spansion Inc.    
Document Type 10-Q    
Current Fiscal Year End Date --12-30    
Entity Common Stock, Shares Outstanding   60,203,084 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 Sep. 30, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q3