Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale securities, at fair value:
Fixed maturity securities (amortized cost)		$ 76,353
Variable interest entities' fixed maturity securities (amortized cost)	584
Equity securities (cost)	$ 235	$ 182
Stockholders Equity
Preferred stock - shares authorized (in shares)	10,000,000	10,000,000
Common stock - shares authorized (in shares)	800,000,000	800,000,000
Common stock - shares issued (in shares)	260,831,708	262,896,701
Common stock - shares outstanding (in shares)	260,831,708	262,896,701