Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed Maturities, cost	$ 35,469	$ 36,958
Equity Securities, cost	$ 1,060	$ 1,089
Common Stock, Par Value	$ 1	$ 1
Common Stock, Shares issued	371,980,460	371,980,460
Treasury Stock, Shares	144,924,588	139,551,071