Document And Entity Information
3 Months Ended
Mar. 31, 2013
Apr. 26, 2013
Common Class A [Member]
Apr. 26, 2013
Common Class B [Member]
Entity Registrant Name Spansion Inc.    
Document Type 10-Q    
Current Fiscal Year End Date --12-29    
Entity Common Stock, Shares Outstanding   58,539,183 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 Mar. 31, 2013    
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus Q1