Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2010 Hartford Investments Canada Corporation [Member]	Dec. 31, 2010 Hartford Advantage Investment Limited [Member]
Revenue
Fee income and other	$ 526	$ 569	$ 616
Net investment income (loss)	0	1	(1)
Net realized capital gains	0	1	0
Total revenues	526	571	615
Benefits, losses and expenses
Insurance operating costs and other expenses	384	374	413
Amortization of DAC	35	47	68
Goodwill impairment	149	0	0
Total benefits, losses and expenses	568	421	481
Income (loss) before income taxes	(42)	150	134
Income tax expense (benefit)	(13)	52	48
Income (loss) from operations of discontinued operations, net of tax	(29)	98	86
Net realized capital gain on disposal, net of tax	0	0	37	41	4
Income (loss) from discontinued operations, net of tax	$ (29)	$ 98	$ 123