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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2016
Feb. 23, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name HARTFORD FINANCIAL SERVICES GROUP INC/DE  
Entity Central Index Key 0000874766  
Document Type 10-K  
Document Period End Date Dec. 31, 2016  
Amendment Flag false  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q4  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   370,189,269
Entity Public Float $ 17.0