Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Feb. 21, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	HARTFORD FINANCIAL SERVICES GROUP INC/DE
Entity Central Index Key	0000874766
Document Type	10-Q/A
Document Period End Date	Sep. 30, 2012
Amendment Flag	true
Amendment Description	The Hartford Financial Services Group, Inc. (collectively, "The Hartford", the "Company", "we", or "our") is filing this Amendment No. 1 on Form 10-Q/A to amend and restate in their entirety the following items of our Quarterly Report on Form 10-Q for the three and nine months ended September 30, 2012 as originally filed with the Securities and Exchange Commission on November 1, 2012 (the “Original Form 10-Q”): (i) Item 1 of Part I, “Financial Statements,” (ii) Item 2 of Part I, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” (iii) Item 4 of Part I, "Controls and Procedures" and (iv) Item 6 of Part II, “Exhibits”. We have also updated the signature page, the Deloitte & Touche LLP Letter of Awareness in Exhibit 15.01, the certifications of our Chief Executive Officer and Principal Financial Officer in Exhibits 31.01, 31.02, 32.01 and 32.02, respectively, and our financial statements formatted in Extensible Business Reporting Language (XBRL) in Exhibits 101. No other sections were affected, or have been changed; however for the convenience of the reader, this report on Form 10-Q/A restates in its entirety, as amended, our Original Form 10-Q. This report on Form 10-Q/A is presented as of the filing date of the Original Form 10-Q and does not reflect events occurring after that date, or modify or update disclosures in any way, other than as required to reflect the restatement described below, the change in definition of the non-GAAP measure core earnings to be consistent with the manner in which management assesses the Company's performance and the closing of certain specified transactions as described herein. On September 27, 2012, the Company announced it had entered into a definitive agreement to sell its Individual Life insurance business to The Prudential Insurance Company of America ("Prudential"), a subsidiary of Prudential Financial, Inc., (the "Transaction") for cash consideration of $615 consisting primarily of a ceding commission. The sale, which is structured as a reinsurance transaction, closed on January 2, 2013. As part of the agreement, the Company will continue to sell life insurance products and riders during a transition period, and Prudential will assume all expenses and risk for these sales through a reinsurance agreement. Based on accounting review and validation procedures performed in connection with the financial reporting and close process for the fourth quarter of 2012 and subsequent to the filing of the Original Form 10-Q, the Company identified that the impact of certain reinsurance recoverable balances associated with the Transaction was incorrectly omitted in determining the estimated gain or loss on disposition associated with the Transaction. As a result of such identification, the Company concluded that it would be necessary to recognize an estimated pre-tax reinsurance loss on disposition of $533 comprised of the impairment of goodwill attributed to the Individual Life business of $342 and a loss accrual for a premium deficiency of $191, which should have been recorded in the third quarter of 2012. The estimate is subject to change pending final determination of net assets sold, transaction costs, and other adjustments.
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		436,598,310