v3.6.0.2
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Feb. 27, 2017
Jun. 30, 2016
Document and Entity Information [Abstract]      
Entity Registrant Name ST JOE CO    
Trading Symbol JOE    
Entity Central Index Key 0000745308    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Common Stock, Shares Outstanding   74,342,826  
Entity Public Float     $ 522.7