Schedule II Condensed Financial Information of The Hartford Financial Services Group, Inc. Level 4 Cash Flow Disclosures (Details) (USD $)	1 Months Ended	3 Months Ended									12 Months Ended
	Jul. 29, 2014	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2009
Operating Activities
Net Income (Loss) Attributable to Parent		$ 382,000,000	$ 388,000,000	$ (467,000,000)	$ 495,000,000	$ 314,000,000	$ 293,000,000	$ (190,000,000)	$ (241,000,000)		$ 798,000,000	$ 176,000,000	$ (38,000,000)
Loss on extinguishment of debt										(587,000,000)	0	213,000,000	910,000,000
Net cash provided by operating activities											1,886,000,000	1,237,000,000	2,681,000,000
Investing Activities
Net sales (purchases) of short-term investments											(1,814,000,000)	318,000,000	1,400,000,000
Net cash used for investing activities											1,696,000,000	3,745,000,000	(2,557,000,000)
Financing Activities
Proceeds from the issuance of long-term debt												533,000,000	2,123,000,000
Repurchase of warrants											0	(33,000,000)	(300,000,000)
Treasury stock acquired	165,000,000
Dividends paid on preferred stock												(21,000,000)	(42,000,000)
Dividends paid on common stock											(282,000,000)	(202,000,000)	(175,000,000)
Net cash used for financing activities											(4,476,000,000)	(5,820,000,000)	(228,000,000)
Cash, Period Increase (Decrease)											(1,029,000,000)	(993,000,000)	(160,000,000)
Cash - beginning of period					1,428,000,000				2,421,000,000		1,428,000,000	2,421,000,000	2,581,000,000
Cash - end of period		399,000,000				1,428,000,000					399,000,000	1,428,000,000	2,421,000,000
Supplemental Disclosure of Cash Flow Information
Interest paid											377,000,000	402,000,000	461,000,000
Parent Company [Member]
Operating Activities
Net Income (Loss) Attributable to Parent											798,000,000	176,000,000	(38,000,000)
Loss on extinguishment of debt											0	176,000,000	910,000,000
Undistributed earnings (losses) of subsidiaries											(1,120,000,000)	(549,000,000)	(847,000,000)
Change in operating assets and liabilities											3,376,000,000	1,170,000,000	770,000,000
Net cash provided by operating activities											3,054,000,000	973,000,000	795,000,000
Investing Activities
Net sales (purchases) of short-term investments											(212,000,000)	(454,000,000)	213,000,000
Capital contributions to subsidiaries											(585,000,000)	1,211,000,000	(334,000,000)
Net cash used for investing activities											(797,000,000)	757,000,000	(121,000,000)
Financing Activities
Proceeds from the issuance of long-term debt											0	295,000,000	2,123,000,000
Repurchase of warrants											0	(33,000,000)	(300,000,000)
Repayments of long-term debt											(200,000,000)	(1,190,000,000)	(2,133,000,000)
Treasury stock acquired											(1,796,000,000)	(600,000,000)	(154,000,000)
Proceeds and Excess Tax Benefit from Share-based Compensation											21,000,000	20,000,000	7,000,000
Dividends paid on preferred stock											0	(21,000,000)	(42,000,000)
Dividends paid on common stock											(282,000,000)	(201,000,000)	(175,000,000)
Net cash used for financing activities											(2,257,000,000)	(1,730,000,000)	(674,000,000)
Cash, Period Increase (Decrease)											0	0	0
Cash - beginning of period					0				0		0	0		0
Cash - end of period		0				0					0	0	0	0
Supplemental Disclosure of Cash Flow Information
Interest paid											366,000,000	366,000,000	443,000,000
Dividends Received from Subsidiaries											$ 2,589,000,000	$ 1,096,000,000	$ 1,026,000,000