Consolidated Balance Sheet (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Fixed maturities, available for sale at amortized cost	$ 28,409	$ 25,366
Equity securities, at cost	$ 1,279	$ 987
Common Stock, par value (USD per share)
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares outstanding	88,490,967	89,513,386