Schedule II Condensed Financial Information of The Hartford Financial Services Group, Inc. Level 4 Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2014
Consolidated Statements of Operations and Comprehensive Income
Net investment income (loss)									$ 3,154	$ 3,264	$ 4,127
Net realized capital gains (losses)									(16)	(1,798)	(497)
Revenues	4,617	4,769	4,616	4,612	4,777	4,862	4,734	6,300	18,614	20,673	22,086
Interest expense									376	397	457
Total benefits, losses and expenses	4,173	4,273	4,466	4,003	4,295	4,416	4,497	5,994	16,915	19,202	22,175
Income Tax Expense (Benefit)									350	246	(309)
Net Income (Loss) Attributable to Parent	382	388	(467)	495	314	293	(190)	(241)	798	176	(38)
Other Comprehensive Income (Loss), Net of Tax									1,007	(2,922)	1,592
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									1,805	(2,746)	1,554
White River Life Reinsurance [Member]
Condensed Financial Statements, Captions [Line Items]
Accounts and Notes Receivable, Net												655
Parent Company [Member]
Consolidated Statements of Operations and Comprehensive Income
Net investment income (loss)									11	10	3
Net realized capital gains (losses)									6	7	6
Revenues									5	3	(3)
Interest expense									365	384	439
Other expenses									134	178	926
Total benefits, losses and expenses									499	562	1,365
Loss before income taxes and earnings (losses) of subsidiaries									(494)	(559)	(1,368)
Income Tax Expense (Benefit)									(172)	(187)	(482)
Loss Before Earnings Losses of Subsidiaries									(322)	(372)	(886)
Earnings (losses) of subsidiaries									1,120	548	848
Net Income (Loss) Attributable to Parent									798	176	(38)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax									0	(11)	0
Change in net unrealized gain/loss on securities									(10)	13	(1)
Change in pension and other postretirement plan adjustments									292	(127)	172
Other Comprehensive Income (Loss), Before Other Comprehensive Income of Subsidiaries, Net of Tax									(282)	103	(171)
Other comprehensive income of subsidiaries									$ 1,289	$ (3,025)	$ 1,763