Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fixed maturities, available-for-sale, at amortized cost	$ 29,627	$ 45,753
Fixed maturities, available-for-sale, variable interest entity assets	49	89
Fixed maturities, at fair value using the fair value option, variable interest entity assets	125	132
Equity securities, trading, at cost	10	1,614
Equity securities, available-for-sale, at cost	386	408
Mortgage loans loss, net of allowances	12	14
Limited partnerships and other alternative investments, variable interest entity assets	4	6
Short-term investment, variable interest entity assets	6	0
Other liabilities, variable interest entity liabilities	$ 73	$ 111
Common stock, par value	$ 5,690	$ 5,690
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock: shares outstanding	1,000	1,000