Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Investments
Fixed maturities, available-for-sale, at amortized cost	$ 77,367	$ 78,419
Fixed maturities, available-for-sale, variable interest entity assets	177	406
Fixed maturities, at fair value using the fair value option, variable interest entity assets	333	323
Equity securities, trading, at cost	32,774	33,899
Equity securities, available-for-sale, at cost	1,070	1,013
Mortgage loans loss, net of allowances	171	155
Limited partnerships and other alternative investments, variable interest entity assets	7	14
Liabilities
Other liabilities, variable interest entity liabilities	$ 439	$ 394
Stockholders' Equity
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	575,000	575,000
Preferred stock, liquidation preference per share	$ 1,000	$ 1,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,500,000,000	1,500,000,000
Common stock, shares issued	469,754,771	469,754,771
Treasury stock, shares	24,468,484	25,205,283