v2.4.0.6
Document and Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2010
Feb. 18, 2011
Jun. 30, 2010
Document and Entity Information (Abstract)      
Entity Registrant Name ST JOE CO    
Entity Central Index Key 0000745308    
Document Type 10-K    
Document Period End Date Dec. 31, 2010    
Amendment Flag false    
Document Fiscal Year Focus 2010    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 2.1
Entity Common Stock, Shares Outstanding   92,568,657