v2.4.0.6
Document and Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 30, 2012
Mar. 08, 2013
Jun. 24, 2012
Document And Entity Information      
Entity Registrant Name KRATOS DEFENSE & SECURITY SOLUTIONS, INC.    
Entity Central Index Key 0001069258    
Current Fiscal Year End Date --12-30    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 30, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Current Reporting Status Yes    
Entity Common Stock, Shares Outstanding   56,646,430  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Public Float     $ 232.0