Document and Entity Information Document - Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 24, 2018
Document - Entity Information [Abstract]
Entity Registrant Name	HARTFORD FINANCIAL SERVICES GROUP INC/DE
Entity Central Index Key	0000874766
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		358,419,118