Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Fixed maturity securities, available-for-sale, at fair value	$ 9,729	$ 9,488
Common stock Par Value (per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	181,158,708	182,177,866
Common stock, shares outstanding	181,158,708	182,177,866
Accumulated other comprehensive income, tax provision	$ 117	$ 71
Deferred equity compensation, shares	320,193	320,193