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Document and Entity Information
Aug. 08, 2019
Document And Entity Information [Line Items]  
Entity Registrant Name HARTFORD FINANCIAL SERVICES GROUP, INC.
Amendment Flag false
Entity Central Index Key 0000874766
Document Type 8-K
Document Period End Date Aug. 08, 2019
Entity Incorporation, State or Country Code DE
Entity File Number 001-13958
Entity Tax Identification Number 13-3317783
Entity Address, Address Line One One Hartford Plaza
Entity Address, City or Town Hartford
Entity Address, State or Province CT
Entity Address, Postal Zip Code 06155
City Area Code (860)
Local Phone Number 547-5000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol HIG
Security Exchange Name NYSE
6.10% Notes due October 1, 2041 [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security 6.10% Notes due October 1, 2041
Trading Symbol HIG 41
Security Exchange Name NYSE
Junior Subordinated Debt [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security 7.875% Fixed-to-Floating Rate Junior Subordinated Debentures due 2042
Trading Symbol HGH
Security Exchange Name NYSE
Depositary Shares, Each Representing a 1/1,00th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share  
Document And Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, Each Representing a 1/1,00th Interest in a Share of 6.000% Non-Cumulative
Trading Symbol HIG PR G
Security Exchange Name NYSE