CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Investments
Fixed Maturity Securities, Amortized Cost	$ 38,920.4	$ 38,289.6
Stockholders' Equity
Common Stock, Par	$ 0.10	$ 0.10
Common Stock, Authorized	725,000,000	725,000,000
Common Stock, Issued	361,456,139	360,802,426
Treasury Stock, Shares at Cost	109,524,849	100,785,012