Consolidated Balance Sheet Parentheticals (Unaudited at March 31, 2014) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheet (Unaudited at March 31, 2014)
Fixed maturities, available for sale, amortized cost	$ 61,995	$ 62,196
Equity securities, available for sale, cost	$ 660	$ 686
Common stock, shares authorized	1,750.0	1,750.0
Common stock, shares issued	347.5	353.5
Common stock, shares outstanding	347.5	353.5	376.4	377.4
Treasury stock, at cost, shares	410.0	401.5