Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Fixed maturities, available-for-sale, at amortized cost	$ 80,021	$ 78,978
Fixed maturities, available-for-sale, variable interest entity assets	235	153
Fixed maturities, at fair value using the fair value option, variable interest entity assets	339	338
Short-term investment, variable interest entity assets	10
Equity securities, trading, at cost	30,212	32,928
Equity securities, available-for-sale, at cost	1,001	1,056
Mortgage loans loss, net of allowances	88	102
Limited partnerships and other alternative investments, variable interest entity assets	7	7
Other liabilities, variable interest entity liabilities	$ 461	$ 471
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock authorized	50,000,000	50,000,000
Convertible 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	469,746,638	469,750,171
Treasury stock, shares	28,881,233	27,211,115