Consolidated Balance Sheet Parentheticals (Unaudited at September 30, 2015) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Consolidated Balance Sheet (Unaudited at September 30, 2015)
Fixed maturities, available for sale, amortized cost	$ 59,688	$ 60,801
Equity securities, available for sale, cost	$ 553	$ 579
Common stock, shares authorized	1,750.0	1,750.0
Common stock, shares issued	304.2	322.2
Common stock, shares outstanding	304.2	322.2	331.4	353.5
Treasury stock, at cost, shares	458.8	437.3