Separate Accounts, Death Benefits and Other Insurance Benefit Features (Details) (Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Minimum deferral period for return initial investment of income benefit	P10Y
Minimum deferral period for earnings liquidity of income benefit	P15Y
Minimum deferral period for fixed annuity of income benefit	P20Y
Age of insurer up to return of premium and MAV	80
Invested in fixed income securities	16.00%	15.00%
Invested in equity securities	84.00%	85.00%
Percentage of GMDB Retained Net Amount Of Risk reinsured to a Hartford Affiliate	55.00%
Percentage of GMIB Net Amount Of Risk Reinsured To Hartford Affiliate	68.00%
MAV Only [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Age of insurer up to adjusted for withdrawls	80
With Five Percent Rollup [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Simple interest up to the earlier of age 80	5.00%
Adjusted premiums	100.00%
With Earnings Protection Benefit Rider (EPB) [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Premiums net of withdrawals	200.00%
Asset Protection Benefit ("APB") [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Greater of net premiums and MAV	25.00%
Number of past months adjusted for premiums	P12M
Reset [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Age of insurer up to adjusted for withdrawls	80
Japan GMIB [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Guaranteed Remaining Balance	$ 33,200	$ 33,900
Japan GMAB and GMWB [Member]
Separate Accounts, Death Benefits and Other Insurance Benefit Features (Textuals) [Abstract]
Guaranteed Remaining Balance	$ 687	$ 707